Patent Publication Number: US-2023148836-A1

Title: Compact multi-viewing element endoscope system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 17/141,512, entitled “Compact Multi-Viewing Element Endoscope System,” and filed on Jan. 5, 2021, which is a continuation of U.S. Nonprovisional patent application Ser. No. 16/191,184, entitled “Compact Multi-Viewing Element Endoscope System,” and filed on Nov. 14, 2018, which is a continuation of U.S. patent application Ser. No. 15/413,773, entitled “Compact Multi-Viewing Element Endoscope System,” and filed on Jan. 24, 2017, which is a continuation application of U.S. patent application Ser. No. 14/229,699, entitled “Compact Multi-Viewing Element Endoscope System” and filed on Mar. 28, 2014, which relies on, for priority, the following United States Provisional Patent Applications, which are also herein incorporated by reference in their entirety: 
     U.S. Provisional Patent Application No. 61/806,065, entitled “Multi Camera, Multi Jet Endoscope Having Two Side Service Channels” and filed on Mar. 28, 2013; 
     U.S. Provisional Patent Application No. 61/812,709, entitled “Multi Camera, Multi Jet Endoscope Having Two Side Service Channels” and filed on Apr. 16, 2013; 
     U.S. Provisional Patent Application No. 61/817,237, entitled “Method and System for Video Processing in a Multi-Viewing Element Endoscope” and filed on Apr. 29, 2013; 
     U.S. Provisional Patent Application No. 61/820,100, entitled “Image Capture Assembly for Use with Endoscope” and filed on May 6, 2013; 
     U.S. Provisional Patent Application No. 61/821,579, entitled “Operational Interface in a Multi-Viewing Element Endoscope” and filed on May 9, 2013; 
     U.S. Provisional Patent Application No. 61/822,563, entitled “Systems and Methods of Displaying a Plurality of Contiguous Images with Minimal Distortion”, and filed on May 13, 2013. 
     U.S. Provisional Patent Application No. 61/824,236, entitled “Multi-Viewing Endoscope” and filed on May 16, 2013; 
     U.S. Provisional Patent Application No. 61/824,653, entitled “Interface Unit for Endoscopic System” and filed on May 17, 2013; 
     U.S. Provisional Patent Application No. 61/824,863, entitled “Multi-Viewing Element Endoscope Having Two Front Service Channels” and filed on May 17, 2013; 
     U.S. Provisional Patent Application No. 61/828,039, entitled “Multi-Viewing Element Endoscope Having Two Front Service Channels” and filed on May 28, 2013; U.S. Provisional Patent Application No. 61/840,691, entitled “Multi-Viewing Element Endoscope With Modular Imaging Units” and filed on Jun. 28, 2013; 
     U.S. Provisional Patent Application No. 61/840,706, entitled “Multi-Jet Distributor For An Endoscope” and filed on Jun. 28, 2013; 
     U.S. Provisional Patent Application No. 61/841,863, entitled “Circuit Board Assembly of a Multi Viewing Elements Endoscope” and filed on Jul. 1, 2013; 
     U.S. Provisional Patent Application No. 61/881,661, entitled “Circuit Board Assembly of An Endoscope” and filed on Sep. 24, 2013; 
     U.S. Provisional Patent Application No. 61/897,896, entitled “Circuit Board Assembly of a Multi Viewing Elements Endoscope” and filed on Oct. 31, 2013; 
     U.S. Provisional Patent Application No. 61/899,465, entitled “Illuminator Circuit Board Assembly of An Endoscope” and filed on Nov. 4, 2013; 
     U.S. Provisional Patent Application No. 61/910,863, entitled “Multi-Jet Endoscope” and filed on Dec. 2, 2013; 
     U.S. Provisional Patent Application No. 61/925,080, entitled “Circuit Board Assembly of a Multi Viewing Elements Endoscope” and filed on Jan. 8, 2014; 
     U.S. Provisional Patent Application No. 61/926,732, entitled “Multi-Jet Endoscope” and filed on Jan. 13, 2014; 
     U.S. Provisional Patent Application No. 61/935,647, entitled “Circuit Board Assembly of An Endoscope” and filed on Feb. 4, 2014; 
     U.S. Provisional Patent Application No. 61/936,562, entitled “Method and System for Video Processing In A Multi-Viewing Element Endoscope” and filed on Feb. 6, 2014; 
     U.S. Provisional Patent Application No. 61/948,009, entitled “Manifold for Multi-Viewing Element Endoscope” and filed on Mar. 4, 2014; 
     U.S. Provisional Patent Application No. 61/950,696, entitled “Service Channel Connector of An Endoscope” and filed on Mar. 10, 2014; and 
     U.S. Provisional Patent Application No. 61/968,436, entitled “System for Connecting and Disconnecting A Main Connector and A Main Control Unit of An Endoscope” and filed on Mar. 21, 2014. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/984,028, entitled “Multi-Element Cover for a Multi-Camera Endoscope”, filed on Aug. 22, 2013, and issued as U.S. Pat. No. 9,101,266 on Aug. 11, 2015, which is a 371 National Stage Entry of PCT Application Number PCT/IL2012/050037, of the same title and filed on Feb. 6, 2012, which, in turn, relies upon U.S. Provisional Patent Application No. 61/439,948, filed on Feb. 7, 2011, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/992,021, entitled “Fluid Channeling Component of a Multi-Camera Endoscope”, filed on Jun. 6, 2013, and issued as U.S. Pat. No. 9,320,419 on Apr. 26, 2016, which is a 371 National Stage Entry of PCT Application Number PCT/IL2011/050050, entitled “Flexible Electronic Circuit Board Multi-Camera Endoscope” and filed on Dec. 8, 2011, which, in turn, relies upon U.S. Provisional Patent Application No. 61/421,240, filed on Dec. 9, 2010, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/992,014, entitled “Flexible Electronic Circuit Board for a Multi-Camera Endoscope” and filed on Jun. 6, 2013, which is a 371 National Stage Entry of PCT Application Number PCT/IL2011/050049, of the same title and filed on Dec. 8, 2011, which, in turn, relies upon U.S. Provisional Patent Application No. 61/421,238, filed on Dec. 9, 2010, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/882,004, entitled “Optical Systems for Multi-Sensor Endoscopes” and filed on May 23, 2013, which is a 371 National Stage Entry of PCT Application Number PCT/IL2011/000832, of the same title and filed on Oct. 27, 2011, which, in turn, relies upon U.S. Provisional Patent Application No. 61/407,495, filed on Oct. 28, 2010, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/822,908, entitled “Multi-Camera Endoscope Having Fluid Channels” and filed on Mar. 13, 2013, which is a 371 National Stage Entry of PCT Application Number PCT/IL2011/000745, of the same title and filed on Sep. 20, 2011, which, in turn, relies upon U.S. Provisional Patent Application No. 61/384,354, filed on Sep. 20, 2010, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/713,466, entitled “Rotatable Connector for an Endoscope”, filed on Dec. 13, 2012, and issued as U.S. Pat. No. 9,314,147 on Apr. 19, 2016, which, in turn, relies upon United States Provisional Patent Application No. 61/569,798, of the same title and filed on Dec. 13, 2011, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/713,449, entitled “Removable Tip Endoscope” and filed on Dec. 13, 2012, which, in turn, relies upon United States Provisional Patent Application No. 61/569,796, of the same title and filed on Dec. 13, 2011, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of the following United States Patent Applications, which are herein incorporated by reference in their entirety: 
     U.S. patent application Ser. No. 13/655,120, entitled “Multi-Camera Endoscope” and filed on Oct. 18, 2012; 
     U.S. patent application Ser. No. 13/212,627, entitled “Multi-Viewing Element Endoscope”, filed on Aug. 18, 2011, and issued as U.S. Pat. No. 9,492,063 on Nov. 15, 2016; and 
     U.S. patent application Ser. No. 13/190,968, entitled “Multi-Camera Endoscope”, filed on Jul. 26, 2011, and issued as U.S. Pat. No. 9,101,268 on Aug. 11, 2015, all of which are continuation-in-part applications of U.S. patent application Ser. No. 13/119,032, entitled “Multi-Camera Endoscope” and filed on Jul. 15, 2011, which is a 371 National Stage Entry of PCT Application Number PCT/IL2010/000476, of the same title and filed on Jun. 16, 2010, which, in turn, relies upon U.S. Provisional Patent Application No. 61/218,085, for priority. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/413,252, entitled “Multi Camera Endoscope Assembly Having Multiple Working Channels”, filed on Mar. 6, 2012, and issued as U.S. Pat. No. 9,101,287 on Aug. 11, 2015, which, in turn, relies upon U.S. Provisional Patent Application No. 61/449,746, of the same title and filed on Mar. 7, 2011, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/413,141, entitled “Multi Camera Endoscope Having a Side Service Channel”, filed on Mar. 6, 2012, and issued as U.S. Pat. No. 8,926,502 on Jan. 6, 2015, which, in turn, relies upon U.S. Provisional Patent Application No. 61/449,743, of the same title and filed on Mar. 7, 2011, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/413,059, entitled “Endoscope Circuit Board Assembly”, filed on Mar. 6, 2012, and issued as U.S. Pat. No. 9,402,533 on Aug. 2, 2016, which, in turn, relies upon U.S. Provisional Patent Application No. 61/449,741, of the same title and filed on Mar. 7, 2011, for priority, and is herein incorporated by reference. 
     U.S. patent application Ser. No. 14/229,699 is also a continuation-in-part application of U.S. patent application Ser. No. 13/412,974, entitled “Camera Assembly for Medical Probes” and filed on Mar. 6, 2012, which, in turn, relies upon U.S. Provisional Patent Application No. 61/449,739, of the same title and filed on Mar. 7, 2011, for priority, and is herein incorporated by reference. 
     All of the above-mentioned applications are herein incorporated by reference in their entirety. 
    
    
     FIELD 
     The present specification relates generally to a multi-viewing element endoscope assembly comprising a tip section with a modular or component-based structure thus enabling the tip section to be compactly packed in accordance with various embodiments. 
     BACKGROUND 
     Endoscopes have attained great acceptance within the medical community since they provide a means for performing procedures with minimal patient trauma while enabling the physician to view the internal anatomy of the patient. Over the years, numerous endoscopes have been developed and categorized according to specific applications, such as cystoscopy, colonoscopy, laparoscopy, upper GI endoscopy and others. Endoscopes may be inserted into the body&#39;s natural orifices or through an incision in the skin. 
     An endoscope is usually an elongated tubular shaft, rigid or flexible, having a video camera or a fiber optic lens assembly at its distal end. The shaft is connected to a handle which sometimes includes an ocular for direct viewing. Viewing is also usually possible via an external screen. Various surgical tools may be inserted through a working channel in the endoscope for performing different surgical procedures. 
     Endoscopes, such as colonoscopes, that are currently being used typically have a front camera for viewing the internal organ, such as the colon, an illuminator, a fluid injector for cleaning the camera lens and sometimes also the illuminator, and a working channel for insertion of surgical tools, for example, for removing polyps found in the colon. Often, endoscopes also have fluid injectors (“jet”) for cleaning a body cavity, such as the colon, into which they are inserted. The illuminators commonly used are fiber optics which transmit light, generated remotely, to the endoscope tip section. The use of light-emitting diodes (LEDs) for illumination is also known. 
     Among the disadvantages of such endoscopes are their limited field of view and their limited options for operating medical and surgical tools. 
     There is thus a need in the art for endoscopes, such as colonoscopes, that provide a broader field of view and allow extended access of surgical tools and also enable efficient packing of all necessary elements in the tip section, while maintaining their functionality. 
     SUMMARY 
     The following embodiments and aspects thereof are described and illustrated in conjunction with systems, tools and methods, which are meant to be exemplary and illustrative, not limiting in scope. The present application discloses numerous embodiments. 
     One embodiment is directed toward a manifold for use in an endoscope, comprising: 1) a manifold housing having a partially cylindrical shape with a curved top surface, a partially curved first side and a partially curved second side wherein the manifold housing comprises a base portion with a first width, a first length, and a proximal surface and an elongated portion, which is attached to the base portion, with a second width, a second length, and a distal surface, wherein the first width is greater than the second width and the first length is less than the second length; 2) a first channel extending from the base portion through the elongated portion, wherein the first channel has an entrance port positioned on said proximal surface of the base portion and an exit port positioned on a distal surface of the elongated portion; 3) a second channel extending from the base portion through the elongated portion, wherein the second channel has an entrance port positioned on said proximal surface of the base portion and an exit port positioned on a distal surface of the elongated portion; 4) a Y-shaped fluid conduit comprising a central stem portion, a first prong portion, and a second prong portion, wherein the central stem portion extends from an entrance port on the proximal surface of the base portion through the base portion, wherein the first prong portion extends from an end of the central portion through the base portion to an exit port on the partially curved first side; and wherein the second prong portion extends from an end of the central portion through the base portion to an exit port the partially curved second side; 5) a third channel extending from an entrance port on the proximal surface of the base portion through to an exit port on the partially curved first side; and 6) a fourth channel extending from an entrance port on the proximal surface of the base portion through to an exit port on the partially curved second side, wherein each of the first, second, third, and fourth channels are fluidically isolated and separated from each other. 
     Optionally, the manifold further comprises a fifth channel extending from the base portion through the elongated portion, wherein the third channel has an entrance port positioned on said proximal surface of the base portion and an exit port positioned on a distal surface of the elongated portion and wherein the first, second, third, fourth, and fifth channels are fluidically isolated and separated from each other. The manifold housing is formed from a unitary block of material. The exit port on the partially curved first side of the first prong portion is positioned in a depression in the partially curved first side. The exit port on the partially curved second side of the second prong portion is positioned in a depression in the partially curved second side. A portion of the third channel proximate to the exit port positioned on the partially curved first side bends at an angle relative a portion of the third channel proximate to the entrance port. The angle of bending ranges from 45 degrees to 135 degrees relative to the longitudinal axis of the endoscope. A portion of the fourth channel proximate to the exit port positioned on the partially curved first side bends at an angle relative a portion of the fourth channel proximate to the entrance port. 
     Optionally, the angle of bending ranges from 45 degrees to 135 degrees relative to the longitudinal axis of the endoscope. The third and fourth channels have diameters ranging from approximately 2.8 to 3.2 millimeters. The first channel manifold has a substantially constant diameter within a range from 2.8 millimeters to 4.8 millimeters. The manifold is configured to be a heat sink for transferring heat generated by a plurality of illuminators. The manifold further comprises a groove located on a side of the base portion for receiving a utility cable. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of an endoscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising: 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, 2) a manifold comprising: a manifold housing having a partially cylindrical shape with a curved top surface, a partially curved first side and a partially curved second side wherein the manifold housing comprises a base portion with a first width, a first length, and a proximal surface and an elongated portion, which is attached to the base portion, with a second width, a second length, and a distal surface, wherein the first width is greater than the second width and the first length is less than the second length; a first channel extending from the base portion through the elongated portion, wherein the first channel has an entrance port positioned on said proximal surface of the base portion and an exit port positioned on a distal surface of the elongated portion; a second channel extending from the base portion through the elongated portion, wherein the second channel has an entrance port positioned on said proximal surface of the base portion and an exit port positioned on a distal surface of the elongated portion; a Y-shaped fluid conduit comprising a central stem portion, a first prong portion, and a second prong portion, wherein the central stem portion extends from an entrance port on the proximal surface of the base portion through the base portion, wherein the first prong portion extends from an end of the central portion through the base portion to an exit port on the partially curved first side; and wherein the second prong portion extends from an end of the central portion through the base portion to an exit port the partially curved second side; a third channel extending from an entrance port on the proximal surface of the base portion through to an exit port on the partially curved first side; and a fourth channel extending from an entrance port on the proximal surface of the base portion through to an exit port on the partially curved second side, wherein each of the first, second, third, and fourth channels are fluidically isolated and separated from each other, wherein the elongated portion of the manifold is configured to occupy a first portion of the interior volume; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face; 4) a first side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned in the first curved side face; and 5) a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor and the electrical assembly of the first side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     Optionally, the exit port of third channel is positioned 9.5 to 10.5 millimeters from the first side image sensor. The image capture section further comprises a second side image sensor, defined by a third optical axis, having a lens and an electrical assembly, wherein the lens is positioned in the second curved side face. The first integrated circuit assembly further comprises the electrical assembly of the second side image sensor. Each of the front image sensor, first side image sensor, and second side image sensor generates and receives at least 12 signals each. Each of the front image sensor, first side image sensor, and second side image sensor generates and receives at least 12 signals each. The first integrated circuit assembly is connected to a video processing system via a utility cable and wherein less than 36 signals are transmitted between the first integrated assembly and video processing system. The image capture section further comprises a plurality of discrete illuminators. The manifold is configured to be a heat sink for transferring heat generated by the plurality of discrete illuminators. 
     Optionally, a maximum volume of the partially enclosed interior volume ranges from 2.75 cm 3  to 3.5 cm 3  and wherein each of the front image sensor and first side image sensor is configured to generate a field of view ranging from 120 to 180 degrees, a depth of field ranging from 3 to 100 mm, have a peripheral distortion of less than 80% without reliance on any aspherical components, and have a maximum focal length in a range of 1 to 1.4 mm. 
     In one embodiment, the application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a colonscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising: 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a manifold comprising an elongated housing extending the length of the image capture section and having a first end and a second end, wherein the manifold has at least three separate and fluidically isolated conduits extending through said elongated housing from the first end through the second end and wherein the manifold is configured to occupy a first portion of the interior volume; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume; 6) a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume; 7) a front working channel comprising an exit port and a conduit, wherein the exit port is positioned along the vertical axis of the substantially flat front face and is at least partially in the top left quadrant and the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; and 8) a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned in the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. 
     The embodiment further comprising a jet channel comprising an exit port and a conduit, wherein the exit port is positioned in the top left quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; a first side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; at least two first side illuminators, each comprising a first side transparent cover and a first side electrical assembly, wherein the first side transparent covers are positioned on either side of the lens of the first side image sensor within the depression in the first curved surface and the first side electrical assemblies are positioned within the interior volume; a first side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the first side image sensor; a second side image sensor, defined by a third optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the second curved side face and configured to capture images within a range of 0 to 80 degrees from the third optical axis, wherein the third optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; at least two second side illuminators, each comprising a second side transparent cover and a second side electrical assembly, wherein the second side transparent covers are positioned on either side of the lens of the second side image sensor within the depression in the second curved surface and the second side electrical assemblies are positioned within the interior volume; a second side fluid injector having an exit port positioned within the depression in the second curved side face and configured to eject fluid on the lens of the second side image sensor; and a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, the electrical assembly of the first side image sensor, and the electrical assembly of the second side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     Optionally, the manifold further comprises at least one side service channel comprising at least one exit port and at least one conduit, wherein the at least one exit port is positioned within the depression in at least one of the curved side faces and wherein at least one proximal section of the at least one conduit extends through the elongated housing from the first end of said fluid manifold and at least one distal section of the at least one conduit bends towards at least one of the curved side faces. 
     Optionally, the at least one exit port of said at least one side service channel is positioned 9.5 to 10.5 millimeters and preferably 10.2 millimeters from the second and/or third optical axes of said first and/or second side image sensors. 
     Optionally, the at least one conduit of said at least one side service channel has a diameter ranging from approximately 2.8 to 3.2 millimeters. 
     Optionally, the at least one distal section of the at least one conduit bends at acute angles relative to the longitudinal axis of the colonoscope. The at least one distal section of the at least one conduit bends at an angle ranging from 45 to 60 degrees relative to the longitudinal axis of the colonoscope. The at least one distal section of the at least one conduit bends at an angle of 90 degrees relative to the longitudinal axis of the colonoscope. The at least one distal section of the at least one conduit bends at obtuse angles relative to the longitudinal axis of the colonoscope. The at least one distal section of the at least one conduit bends at an angle ranging from 120 to 135 degrees relative to the longitudinal axis of the colonoscope. The at least one exit port has an angle of exit ranging from 5 to 90 degrees. The at least one exit port has an angle of exit of 45 degrees. 
     Optionally, the housing is a cover for the image capture section that is configured to cover and fluidly seal said first integrated circuit assembly and said fluid manifold, said substantially flat front face of the housing comprising a first opening corresponding to the exit port of the front working channel, a second opening corresponding to the exit port of the fluid injection channel, a third opening corresponding to the exit port of the jet channel, a fourth opening corresponding to the lens of the front image sensor, a fifth opening corresponding to the first front illuminator, a sixth opening corresponding to the second front illuminator, a seventh opening corresponding to the third front illuminator. 
     Optionally, the housing is a cover for the image capture section that is configured to cover and fluidly seal said first integrated circuit assembly and said manifold, said first curved side of the housing comprising a first opening corresponding to the lens of the first side image sensor, a second opening corresponding to the exit port of the first side fluid injection channel, and a third and fourth opening corresponding to the two first side illuminators. 
     Optionally, the housing is a cover for the image capture section that is configured to cover and fluidly seal said first integrated circuit assembly and said manifold, said second curved side of the housing comprising a first opening corresponding to the lens of the second side image sensor, a second opening corresponding to the exit port of the second side fluid injection channel, and a third and fourth opening corresponding to the two second side illuminators. Optionally, the manifold functions as a heat sink for transferring heat generated by the front and side illuminators. 
     Optionally, the image capture section has a diameter ranging from approximately 10 to 15 millimeters or approximately 9 to 17 millimeters or approximately 5 to 18 millimeters or approximately 7 to 12 millimeters or approximately 11.7 millimeters or approximately 11.9 millimeters. Optionally, the lens of said front image sensor has a focal length of about 3 to 100 millimeters, 100 millimeters or 110 millimeters. Optionally, the lens of said first and/or second side image sensor has a focal length of about 3 to 100 millimeters or 2 to 33 millimeters or 2 to 100 millimeters. 
     Optionally, the second and third optical axes of the first and second side image sensors are approximately 8 to 10 millimeters from the flat front face, approximately 7 to 11 millimeters from the flat front face, 9 or 9.1 millimeters from the flat front face, approximately 6 to 9 millimeters from the flat front face, or 7.8 or 7.9 millimeters from the flat front face 
     Optionally, the respective centers of the at least two first side illuminators are separated by a distance ranging from 5.5 to 6.5 millimeters. Optionally, the respective centers of the at least two second side illuminators are separated by a distance ranging from 5.5 to 6.5 millimeters. 
     Optionally, the conduit of said front working channel is substantially constant extending through the shaft and the image capture section and wherein said conduit has a diameter ranging from approximately 2.8 to 4.8 millimeters, ranging from approximately 3.2 to 4.8 millimeters or ranging from approximately 4.2 to 4.8 millimeters. Optionally, the diameter is 3.2 millimeters, 3.8 millimeters, or 4.8 millimeters 
     Optionally, the lens of each of the front image sensor, first side image sensor, and second side image senor is configured to generate peripheral distortion of less than 80%. Optionally, the lens of each of the front image sensor, first side image sensor, and second side image senor is configured to have an optical length of up to 5 millimeters. Optionally, the lens of each of the front image sensor, first side image sensor, and second side image senor is configured to have a field of view of at least 90 degrees and up to essentially 180 degrees. Optionally, the exit ports of the corresponding first and second side fluid injectors are respectively positioned at a distance ranging from 5.8 to 7.5 millimeters and preferably 6.7 millimeters from the second and third optical axes. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a colonscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising: 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a fluid manifold, having a first end and a second end, comprising a base portion with a first width and a first length attached to an elongated housing, having a second width and a second length, wherein the second width is less than the first width and wherein the second length is longer than the first length and extends the length of the image capture section, wherein the fluid manifold has at least three separate and fluidically isolated conduits extending through said elongated housing and said base portion from the first end through the second end, wherein the manifold is configured to occupy a first portion of the interior volume, wherein a bottom surface of the base portion comprises a proximal section of a service channel conduit extending through a center of the base portion, wherein the proximal section of the service channel conduit splits into a first distal section of the service channel conduit that bends towards the first curved side face leading to an exit port and a second distal section of the service channel conduit that bends towards the second curved side face leading to an exit port, and wherein the exit port of the first distal section is located in the depression in the first curved surface and the exit port of the second distal section is located in the depression in the second curved surface; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume; 6) a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume; 7) a front working channel comprising an exit port and a conduit, wherein the exit port is positioned along the vertical axis of the substantially flat front face and is at least partially in the top left quadrant and the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 8) a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned in the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. 
     Optionally, the embodiment comprises a jet channel comprising an exit port and a conduit, wherein the exit port is positioned in the top left quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. Optionally, the embodiment comprises a first side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume. Optionally, the embodiment comprises at least two first side illuminators, each comprising a first side transparent cover and a first side electrical assembly, wherein the first side transparent covers are positioned on either side of the lens of the first side image sensor within the depression in the first curved surface and the first side electrical assemblies are positioned within the interior volume. Optionally, the embodiment comprises a first side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the first side image sensor. Optionally, the embodiment comprises a second side image sensor, defined by a third optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the second curved side face and configured to capture images within a range of 0 to 80 degrees from the third optical axis, wherein the third optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume. 
     Optionally, the embodiment comprises at least two second side illuminators, each comprising a second side transparent cover and a second side electrical assembly, wherein the second side transparent covers are positioned on either side of the lens of the second side image sensor within the depression in the second curved surface and the second side electrical assemblies are positioned within the interior volume. Optionally, the embodiment comprises a second side fluid injector having an exit port positioned within the depression in the second curved side face and configured to eject fluid on the lens of the second side image sensor. Optionally, the embodiment comprises a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, the electrical assembly of the first side image sensor, and the electrical assembly of the second side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     In another embodiment, the present application discloses a manifold for use in an image capture section in an endoscope, the manifold having a first end and a second end and comprising a base portion with a first width and a first length attached to an elongated housing, having a second width and a second length, wherein the second width is less than the first width and wherein the second length is longer than the first length and extends the length of the image capture section, wherein the manifold has at least three separate and fluidically isolated conduits extending through said elongated housing and said base portion from the first end through the second end, wherein the manifold is configured to occupy a first portion of the interior volume, wherein a bottom surface of the base portion comprises a proximal section of a service channel conduit extending through a center of the base portion, wherein the proximal section of the service channel conduit splits into a first distal section of the service channel conduit that bends towards a first curved side face leading to an exit port and a second distal section of the service channel conduit that bends towards a second curved side face leading to an exit port, and wherein the exit port of the first distal section is located in a depression in the first curved surface and the exit port of the second distal section is located in a depression in the second curved surface. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a colonscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising: 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a fluid manifold, having a first end and a second end, comprising a base portion with a first width and a first length attached to an elongated housing, having a second width and a second length, wherein the second width is less than the first width and wherein the second length is longer than the first length and extends the length of the image capture section, wherein the fluid manifold has at least three separate and fluidically isolated conduits extending through said elongated housing and said base portion from the first end through the second end, wherein the manifold is configured to occupy a first portion of the interior volume, wherein a bottom surface of the base portion comprises a proximal section of a service channel conduit extending through a center of the base portion and a distal section of the service channel conduit bends towards the first curved side face leading to an exit port, and wherein the exit port is located in the depression in the first curved surface; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume. 
     Optionally, the present embodiment discloses a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume. Optionally, the present embodiment discloses a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume. Optionally, the present embodiment discloses a front working channel comprising an exit port and a conduit, wherein the exit port is positioned along the vertical axis of the substantially flat front face and is at least partially in the top left quadrant and the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. Optionally, the present embodiment discloses a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned in the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. Optionally, the present embodiment discloses a jet channel comprising an exit port and a conduit, wherein the exit port is positioned in the top left quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. Optionally, the present embodiment discloses a first side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume. 
     Optionally, the present embodiment discloses at least two first side illuminators, each comprising a first side transparent cover and a first side electrical assembly, wherein the first side transparent covers are positioned on either side of the lens of the first side image sensor within the depression in the first curved surface and the first side electrical assemblies are positioned within the interior volume. Optionally, the present embodiment discloses a first side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the first side image sensor. Optionally, the present embodiment discloses a second side image sensor, defined by a third optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the second curved side face and configured to capture images within a range of 0 to 80 degrees from the third optical axis, wherein the third optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume. Optionally, the present embodiment discloses at least two second side illuminators, each comprising a second side transparent cover and a second side electrical assembly, wherein the second side transparent covers are positioned on either side of the lens of the second side image sensor within the depression in the second curved surface and the second side electrical assemblies are positioned within the interior volume. 
     Optionally, the present embodiment discloses a second side fluid injector having an exit port positioned within the depression in the second curved side face and configured to eject fluid on the lens of the second side image sensor. Optionally, the present embodiment discloses a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, the electrical assembly of the first side image sensor, and the electrical assembly of the second side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     In another embodiment, the present application discloses a fluid manifold for use in an image capture section in an endoscope, the fluid manifold having a first end and a second end and comprising a base portion with a first width and a first length attached to an elongated housing, having a second width and a second length, wherein the second width is less than the first width and wherein the second length is longer than the first length and extends the length of the image capture section, wherein the fluid manifold has at least three separate and fluidically isolated conduits extending through said elongated housing and said base portion from the first end through the second end, wherein the manifold is configured to occupy a first portion of the interior volume, wherein a bottom surface of the base portion comprises a proximal section of a service channel conduit extending through a center of the base portion and a distal section of the service channel conduit that bends towards the first curved side face leading to an exit port, and wherein the exit port is located in a depression in the first curved surface. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a colonscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a manifold, having a first end and a second end, comprising a base portion with a first width and a first length attached to an elongated housing, having a second width and a second length, wherein the second width is less than the first width and wherein the second length is longer than the first length and extends the length of the image capture section, wherein the manifold has at least three separate and fluidically isolated conduits extending through said elongated housing and said base portion from the first end through the second end, wherein the manifold is configured to occupy a first portion of the interior volume, wherein a bottom surface of the base portion comprises a proximal section of a first service channel conduit extending through the base portion and a distal section of the first service channel conduit that bends towards the first curved side face leading to an exit port, and wherein the exit port is located in the depression in the first curved surface; and a proximal section of a second service channel conduit also extending through the base portion and a distal section of the second service channel conduit that bends towards the second curved side face leading to an exit port, and wherein the exit port is located in the depression in the second curved surface; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; and 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume. 
     Optionally, the present application discloses a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume. Optionally, the present application discloses a front working channel comprising an exit port and a conduit, wherein the exit port is positioned along the vertical axis of the substantially flat front face and is at least partially in the top left quadrant and the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. Optionally, the present application discloses a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned in the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. Optionally, the present application discloses a jet channel comprising an exit port and a conduit, wherein the exit port is positioned in the top left quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold. Optionally, the present application discloses a first side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume. Optionally, the present application discloses at least two first side illuminators, each comprising a first side transparent cover and a first side electrical assembly, wherein the first side transparent covers are positioned on either side of the lens of the first side image sensor within the depression in the first curved surface and the first side electrical assemblies are positioned within the interior volume. 
     Optionally, the present application discloses a first side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the first side image sensor. Optionally, the present application discloses a second side image sensor, defined by a third optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the second curved side face and configured to capture images within a range of 0 to 80 degrees from the third optical axis, wherein the third optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume. Optionally, the present application discloses at least two second side illuminators, each comprising a second side transparent cover and a second side electrical assembly, wherein the second side transparent covers are positioned on either side of the lens of the second side image sensor within the depression in the second curved surface and the second side electrical assemblies are positioned within the interior volume. Optionally, the present application discloses a second side fluid injector having an exit port positioned within the depression in the second curved side face and configured to eject fluid on the lens of the second side image sensor. Optionally, the present application discloses a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, the electrical assembly of the first side image sensor, and the electrical assembly of the second side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     In another embodiment, the present application discloses a manifold for use in an image capture section in an endoscope, the fluid manifold having a first end and a second end and comprising a base portion with a first width and a first length attached to an elongated housing, having a second width and a second length, wherein the second width is less than the first width and wherein the second length is longer than the first length and extends the length of the image capture section, wherein the fluid manifold has at least three separate and fluidically isolated conduits extending through said elongated housing and said base portion from the first end through the second end, wherein the manifold is configured to occupy a first portion of the interior volume, wherein a bottom surface of the base portion comprises a proximal section of a first service channel conduit extending through the base portion and a distal section of the first service channel conduit that bends towards a first curved side face leading to an exit port, and wherein the exit port is located in a depression in the first curved surface; and a proximal section of a second service channel conduit also extending through the base portion and a distal section of the second service channel conduit that bends towards a second curved side face leading to an exit port, and wherein the exit port is located in the depression in the second curved surface. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a colonscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a fluid manifold comprising an elongated housing extending the length of the image capture section and having a first end and a second end, wherein the fluid manifold has at least three separate and fluidically isolated conduits extending through said elongated housing from the first end through the second end and wherein the fluid manifold is configured to occupy a first portion of the interior volume; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume; 6) a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume; 7) a front working channel comprising an exit port and a conduit, wherein the exit port is positioned along the vertical axis of the substantially flat front face and is at least partially in the top left quadrant and the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 8) a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned in the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 9) a jet channel comprising an exit port and a conduit, wherein the exit port is positioned in the top left quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 10) a first side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 11) at least two first side illuminators, each comprising a first side transparent cover and a first side electrical assembly, wherein the first side transparent covers are positioned on either side of the lens of the first side image sensor within the depression in the first curved surface and the first side electrical assemblies are positioned within the interior volume; 12) a first side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the first side image sensor; 13) a second side image sensor, defined by a third optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the second curved side face and configured to capture images within a range of 0 to 80 degrees from the third optical axis, wherein the third optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 14) at least two second side illuminators, each comprising a second side transparent cover and a second side electrical assembly, wherein the second side transparent covers are positioned on either side of the lens of the second side image sensor within the depression in the second curved surface and the second side electrical assemblies are positioned within the interior volume; 15) a second side fluid injector having an exit port positioned within the depression in the second curved side face and configured to eject fluid on the lens of the second side image sensor; 16) at least one side jet channel comprising at least two exit ports and at least one conduit, wherein the at least two exit ports are positioned around a periphery of said housing and wherein the at least one conduit has at least one corresponding entry port at the first end of said fluid manifold; 17) a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, the electrical assembly of the first side image sensor, and the electrical assembly of the second side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume 
     Optionally, the present application discloses at least one of said at least two exit ports of the at least one side jet channel is partially positioned within the depression. Optionally, one or both of the side fluid injectors are positioned between the at least two exit ports of said at least one side jet channel. Optionally, the at least two exit ports of the at least one side jet channel comprise 2, 4, 6 or 8 exit ports. Optionally, the at least one conduit of the at least one side jet channel has a diameter of approximately 1.4 to 1.7 millimeters. Optionally, the at least one exit port of the at least one side jet channel has an acute angle of exit. Optionally, the at least one exit port of the at least one side jet channel has an obtuse angle of exit. Optionally, the at least one exit port of the at least one side jet channel has an angle of exit ranging from 45 to 60 degrees. Optionally, the at least one exit port of the at least one side jet channel has an angle of exit ranging from 120 to 135 degrees. Optionally, the at least one exit port of the at least one side jet channel operates at a predefined algorithm. Optionally, the at least one exit port of the at least one side jet channel operates at a different predefined algorithm. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a gastroscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a fluid manifold comprising an elongated housing extending the length of the image capture section and having a first end and a second end, wherein the fluid manifold has at least three separate and fluidically isolated conduits extending through said elongated housing from the first end through the second end and wherein the fluid manifold is configured to occupy a first portion of the interior volume; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the gastroscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume; 6) a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume; 7) a front working channel comprising an exit port and a conduit, wherein the exit port is positioned along the vertical axis of the substantially flat front face and is at least partially in the top left quadrant and the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 8) a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned in the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 9) a jet channel comprising an exit port and a conduit, wherein the exit port is positioned in the top left quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 10) a side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the gastroscope, and wherein the electrical assembly is positioned in the interior volume; 11) at least two side illuminators, each comprising a side transparent cover and a side electrical assembly, wherein the side transparent covers are positioned on either side of the lens of the side image sensor within the depression in the first curved surface and the side electrical assemblies are positioned within the interior volume; 12) a side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the side image sensor; and 13) a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, and the electrical assembly of the side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a gastroscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising: 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a fluid manifold comprising an elongated housing extending the length of the image capture section and having a first end and a second end, wherein the fluid manifold has at least three separate and fluidically isolated conduits extending through said elongated housing from the first end through the second end and wherein the fluid manifold is configured to occupy a first portion of the interior volume; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the gastroscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume; 6) a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume; 7) a front working channel comprising an exit port and a conduit, wherein the exit port is positioned along the vertical axis of the substantially flat front face and is at least partially in the top left quadrant and the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 8) a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned in the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 9) a jet channel comprising an exit port and a conduit, wherein the exit port is positioned in the top left quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 10) a side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the gastroscope, and wherein the electrical assembly is positioned in the interior volume; 11) at least two side illuminators, each comprising a side transparent cover and a side electrical assembly, wherein the side transparent covers are positioned on either side of the lens of the side image sensor within the depression in the first curved surface and the side electrical assemblies are positioned within the interior volume; 12) a side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the side image sensor; 13) a side service channel comprising an exit port and a conduit, wherein the exit port is positioned within the depression in the first curved side face and wherein a proximal section of the conduit extends through said elongated housing from the first end of said fluid manifold and a distal section of the conduit bends towards the first curved side face; 14) a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, and the electrical assembly of the side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a gastroscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising: 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a fluid manifold comprising an elongated housing extending the length of the image capture section and having a first end and a second end, wherein the fluid manifold has at least three separate and fluidically isolated conduits extending through said elongated housing from the first end through the second end and wherein the fluid manifold is configured to occupy a first portion of the interior volume; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the gastroscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume; 6) a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume; 7) a front working channel comprising an exit port and a conduit, wherein the exit port is positioned along the vertical axis of the substantially flat front face and is at least partially in the top left quadrant and the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 8) a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned in the top right quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 9) a jet channel comprising an exit port and a conduit, wherein the exit port is positioned in the top left quadrant and wherein the conduit is defined by one of said three separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 10) a side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the gastroscope, and wherein the electrical assembly is positioned in the interior volume; 11) at least two side illuminators, each comprising a side transparent cover and a side electrical assembly, wherein the side transparent covers are positioned on either side of the lens of the side image sensor within the depression in the first curved surface and the side electrical assemblies are positioned within the interior volume; 12) a side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the side image sensor; 13) at least one side jet channel comprising at least one exit port and at least one conduit, wherein the at least one exit port is positioned around a periphery of said housing and wherein the at least one conduit has at least one corresponding entry port at the first end of said fluid manifold; and 14) a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, and the electrical assembly of the side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     Optionally, the present application discloses at least one exit port of the at least one side jet channel is partially positioned within the depression. The at least one exit port of the at least one side jet channel comprises 2, 4, 6 or 8 exit ports. The at least one exit port of the at least one side jet channel is positioned at a distance ranging from 8.5 to 9.5 millimeters from the optical axis of the corresponding side image sensor. The fluid exiting the at least one exit port of the at least one side jet channel forms an angle ranging from 50 to 60 degrees relative to a lateral plane containing the lens of the corresponding side image sensor and side illuminators. The at least one conduit of the at least one side jet channel has a diameter of approximately 1.4 to 1.7 millimeters. The at least one exit port of the at least one side jet channel has an acute angle of exit. The at least one exit port of the at least one side jet channel has an obtuse angle of exit. The at least one exit port of the at least one side jet channel has an angle of exit ranging from 45 to 60 degrees. The at least one exit port of the at least one side jet channel has an angle of exit ranging from 120 to 135 degrees. The at least one exit port of the at least one side jet channel operates at a predefined algorithm. The at least one exit port of the at least one side jet channel operates at a different predefined algorithm. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a colonscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a fluid manifold comprising an elongated housing extending the length of the image capture section and having a first end and a second end, wherein the fluid manifold has at least four separate and fluidically isolated conduits extending through said elongated housing from the first end through the second end and wherein the fluid manifold is configured to occupy a first portion of the interior volume; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is oval and positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is oval and positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume; 6) a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is oval and positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume; 7) a first front working channel comprising an exit port and a conduit, wherein a substantial portion of the exit port is positioned in the top right quadrant of the substantially flat front face and wherein the conduit is defined by one of said four separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 8) a second front working channel comprising an exit port and a conduit, wherein a substantial portion of the exit port is positioned in the top left quadrant of the substantially flat front face and wherein the conduit is defined by one of said four separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 9) a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned at least partially within said top right quadrant and bottom right quadrant and wherein the conduit is defined by one of said four separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 10) a jet channel comprising an exit port and a conduit, wherein the exit port is positioned at least partially within said top left quadrant and top right quadrant and wherein the conduit is defined by one of said four separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 11) a first side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 12) at least two first side illuminators, each comprising a first side transparent cover and a first side electrical assembly, wherein the first side transparent covers are oval and positioned on either side of the lens of the first side image sensor within the depression in the first curved surface and the first side electrical assemblies are positioned within the interior volume; 13) a first side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the first side image sensor; 14) a second side image sensor, defined by a third optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the second curved side face and configured to capture images within a range of 0 to 80 degrees from the third optical axis, wherein the third optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the colonoscope, and wherein the electrical assembly is positioned in the interior volume; 15) at least two second side illuminators, each comprising a second side transparent cover and a second side electrical assembly, wherein the second side transparent covers are oval and positioned on either side of the lens of the second side image sensor within the depression in the second curved surface and the second side electrical assemblies are positioned within the interior volume; 16) a second side fluid injector having an exit port positioned within the depression in the second curved side face and configured to eject fluid on the lens of the second side image sensor; and 17) a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, the electrical assembly of the first side image sensor, and the electrical assembly of the second side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     Optionally, said first and second front working channels are both adapted for insertion of a medical tool. The first and second front working channels are both adapted for applying suction. One of said first and second front working channel is adapted for insertion of a medical tool and another of said first and second front working channel is adapted for applying suction. The distance between the exit ports of said first and second working channels is in a range of 0.40 to 0.45 millimeters. The conduit of said first working channel has a diameter in a range of 3.6 to 4.0 millimeters and the conduit of said second working channel has a diameter in a range of 2.6 to 3.0 millimeters. The conduit of said first working channel has a diameter of 3.8 millimeters and the conduit of said second working channel has a diameter of 2.8 millimeters. 
     In another embodiment, the present application discloses an image capture section having a length and adapted to be attached to an end of a shaft of a gastroscope, wherein the shaft has a length defining a longitudinal axis, the image capture section comprising 1) a housing that defines a partially enclosed interior volume and that is substantially cylindrical with a substantially flat front face, a first curved side face, a second curved side face, wherein the substantially flat front face comprises four quadrants defined by a vertical axis passing through a center of said substantially flat front face and a horizontal axis passing through said center, said four quadrants including a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant and wherein each of said first curved surface and second curved surface comprises a substantially flat depression; 2) a fluid manifold comprising an elongated housing extending the length of the image capture section and having a first end and a second end, wherein the fluid manifold has at least four separate and fluidically isolated conduits extending through said elongated housing from the first end through the second end and wherein the fluid manifold is configured to occupy a first portion of the interior volume; 3) a front image sensor, defined by a first optical axis, having a lens and an electrical assembly, wherein the lens is positioned on a surface of said substantially flat front face and configured to capture images within at least a range of 0 to 80 degrees from the first optical axis, wherein the first optical axis is positioned in a center of the lens and in parallel to said longitudinal axis of the gastroscope, and wherein the electrical assembly is positioned in the interior volume; 4) a first front illuminator comprising a first transparent cover and a first electrical assembly, wherein the first transparent cover is oval and positioned at least partially within said bottom right quadrant and bottom left quadrant of the substantially flat front face and the first electrical assembly is positioned within the interior volume; 5) a second front illuminator comprising a second transparent cover and a second electrical assembly, wherein the second transparent cover is oval and positioned at least partially within said bottom left quadrant of the substantially flat front face and the second electrical assembly is positioned within the interior volume; 6) a third front illuminator comprising a third transparent cover and a third electrical assembly, wherein the third transparent cover is oval and positioned at least partially within said bottom right quadrant of the substantially flat front face and the third electrical assembly is positioned within the interior volume; 7) a first front working channel comprising an exit port and a conduit, wherein a substantial portion of the exit port is positioned in the top right quadrant of the substantially flat front face and wherein the conduit is defined by one of said four separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 8) a second front working channel comprising an exit port and a conduit, wherein a substantial portion of the exit port is positioned in the top left quadrant of the substantially flat front face and wherein the conduit is defined by one of said four separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 9) a fluid injector channel comprising an exit port and a conduit, wherein the exit port is positioned at least partially within said top right quadrant and bottom right quadrant and wherein the conduit is defined by one of said four separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 10) a jet channel comprising an exit port and a conduit, wherein the exit port is positioned at least partially within said top left quadrant and top right quadrant and wherein the conduit is defined by one of said four separate and fluidically isolated conduits extending through the elongated housing of the fluid manifold; 11) a side image sensor, defined by a second optical axis, having a lens and an electrical assembly, wherein the lens is positioned within the depression in the first curved side face and configured to capture images within a range of 0 to 80 degrees from the second optical axis, wherein the second optical axis is positioned in a center of the lens and perpendicular to said longitudinal axis of the gastroscope, and wherein the electrical assembly is positioned in the interior volume; 12) at least two side illuminators, each comprising a side transparent cover and a side electrical assembly, wherein the side transparent covers are oval and positioned on either side of the lens of the side image sensor within the depression in the first curved surface and the side electrical assemblies are positioned within the interior volume; 13) a side fluid injector having an exit port positioned within the depression in the first curved side face and configured to eject fluid on the lens of the first side image sensor; and 14) a first integrated circuit assembly comprising a print circuit board having mounted thereon the electrical assembly of the front image sensor, and the electrical assembly of the side image sensor, wherein the first integrated circuit assembly is configured to occupy a second portion of the interior volume. 
     Optionally, the first and second front working channels are both adapted for insertion of a medical tool. The first and second front working channels are both adapted for applying suction. One of said first and second front working channel is adapted for insertion of a medical tool and another of said first and second front working channel is adapted for applying suction. The distance between the exit ports of said first and second working channels is in a range of 0.40 to 0.45 millimeters. The conduit of said first working channel has a diameter in a range of 3.6 to 4.0 millimeters and the conduit of said second working channel has a diameter in a range of 2.6 to 3.0 millimeters. The conduit of said first working channel has a diameter of 3.8 millimeters and the conduit of said second working channel has a diameter of 2.8 millimeters. 
     Optionally, the optical axis of said at least one side-looking viewing element forms an obtuse angle with an optical axis of said at least one front-pointing viewing element. The optical axis of said at least one side-looking viewing element forms an acute angle with an optical axis of said at least one front-pointing viewing element. The openings are positioned to allow at least one said side-looking camera to view a medical tool protruding from the openings. 
     In conjunction with any of the above embodiments, the at least one side jet channel circulates a fluid through a groove connected to the at least one side jet channel, wherein said housing further comprises a plurality of holes drilled above the groove, and wherein the plurality of holes allow the fluid circulating through the groove to exit. The one or more side jet channels comprise two side jet channels positioned on opposing sides of the tip section of the endoscope assembly. The plurality of holes bend at acute angles relative to a long dimension of the endoscope assembly. The plurality of holes bend at 90 degrees relative to a long dimension of the endoscope assembly. The plurality of holes bend at obtuse angles relative to a long dimension of the endoscope assembly. The plurality of holes bend at angles that are a combination of acute, right and obtuse angles, relative to a long dimension of the endoscope assembly. The plurality of holes are placed linearly, above the groove. Each hole of the plurality of holes is at a distance of at least 0.2 millimeters from each adjacent hole. Each hole of the plurality of holes has a diameter of 5 millimeters. 
     Optionally, the at least one side jet channel circulates a fluid through a removable ring assembly placed on said housing, the removable ring assembly comprising a peripheral groove placed on an internal periphery of the ring assembly, wherein the at least two exit ports of the at least one side jet channel are aligned with the peripheral groove; and a plurality of holes drilled along the peripheral groove, wherein the plurality of holes allow exit of the fluid circulating through the removable ring assembly. 
     Optionally, the first diameter of the tip cover is less than a second diameter of the peripheral grove. The one or more side jet channels comprise two side jet channels positioned on opposing sides of the tip section of the endoscope assembly. The plurality of holes bend at acute angles relative to a long dimension of the endoscope assembly. The plurality of holes bend at 90 degrees relative to a long dimension of the endoscope assembly. The plurality of holes bend at obtuse angles relative to a long dimension of the endoscope assembly. The plurality of holes bend at angles that are a combination of acute, right and obtuse angles, relative to a long dimension of the endoscope assembly. The plurality of holes are placed linearly, above the peripheral groove. Each hole of the plurality of holes is at a distance of at least 0.2 millimeters from each adjacent hole. Each of the plurality of holes has a diameter of 5 millimeters. 
     In conjunction with any of the above embodiments, the present application discloses a sprinkler assembly in a tip section. The tip section of a multi-viewing elements endoscope assembly, comprises: 1) one or more jet channels circulating a fluid; 2) a tip cover associated with the tip section and comprising one or more jet channel openings aligned with the one or more jet channels; and 3) a removable sprinkler assembly comprising a patch placed above each of the one or more jet channel openings and a plurality of holes drilled along the patch, wherein the plurality of holes allow exit of the fluid circulated through the one or more jet channels. 
     Optionally, the one or more jet channels comprise two side jet channels positioned on opposing sides of the tip section of the endoscope assembly. The one or more jet channels comprise a front jet channel positioned on a front panel of the tip section of the endoscope assembly. The plurality of holes bend at acute angles relative to a long dimension of the endoscope assembly. The plurality of holes bend at 90 degrees relative to a long dimension of the endoscope assembly. The plurality of holes bend at angles that are a combination of acute, right and obtuse angles, relative to a long dimension of the endoscope assembly. The plurality of holes bend at different angles relative to a long dimension of the endoscope assembly. The plurality of holes are placed linearly on the patch, along a circumference of the tip cover. The one or more jet channel openings operate at a predefined algorithm. Each of the one or more jet channel openings operate at a different predefined algorithm. 
     Optionally, the tip section further comprises a front injector; at least one side injector; at least one front-pointing viewing element and at least one front illuminator associated therewith; at least one side-looking viewing element and at least one side illuminator associated therewith; and a front working channel configured for insertion of a medical tool. 
     In conjunction with any of the above embodiments, the present application discloses a multi jet distributor for supplying fluid to a plurality of jet openings in a tip section of a multi-viewing elements endoscope, the multi jet distributor comprising a distributor housing; a distributor motor located within the distributor housing; a motor shaft coupled to the distributor motor and located within the distributor housing; and a distributor disc located within the distributor housing and coupled with the motor shaft, wherein the distributor disc comprises an entering fluid pipeline for supplying said fluid to the multi jet distributor; and at least one exiting fluid pipeline for providing said fluid supplied by the entering fluid pipeline to the plurality of jet openings. 
     Optionally, the plurality of jet openings comprise a front jet opening and at least one side jet opening. The plurality of jet openings comprise a front jet opening; a first side jet opening and a second side jet opening. The distributor housing further comprises a locking element for fixedly positioning the distributor disc within the distributor housing. The distributor disc further comprises a plug for connecting the distributor disc with the motor shaft. The distributor disc further comprises a groove on an outer surface of said distributor disc for receiving the locking element. The pump supplies said fluid to the entering fluid pipeline. The multi jet distributor is connected to the endoscope via a main connector. The main connector has a multi-jet controller comprising a shaft leading to a valve placed in a housing that operatively connects the valve to the main connector through a jet connector, wherein the valve has screws formed thereon, and wherein a first position of the shaft rotates the screws causing the fluid to exit only the front jet opening and a second position of the shaft rotates the screws causing the fluid to exit through both the front jet opening and the at least one side jet opening. 
     Optionally, the distributor disc has a distributor rate ranging between 30 rounds per minute to 100 rounds per minute. The distributor disc has a distributor rate ranging between 50 and 65 rounds per minute. The at least one exiting fluid pipeline comprises three fluid pipelines for providing said fluid supplied by the entering fluid pipeline to the plurality of jet openings. The plurality of jet openings comprise a front jet opening and at least one side jet opening. The plurality of jet openings comprise a front jet opening; a first side jet opening and a second side jet opening. The at least one exiting fluid pipeline comprises two exiting fluid pipelines for providing said fluid supplied by the entering fluid pipeline to the plurality of jet openings. The plurality of jet openings comprise a front jet opening and at least one side jet opening. The plurality of jet openings comprise a front jet opening; a first side jet opening and a second side jet opening. The main connector has a multi jet controller comprising a shaft leading to a valve placed in a housing that operatively connects the valve to the main connector through a jet connector, wherein the valve has screws formed thereon, and wherein a first position of the shaft rotates the screws causing the fluid to exit only the front jet opening and a second position of the shaft rotates the screws causing the fluid to exit through both the front jet opening and the at least one side jet opening. 
     In conjunction with any of the above embodiments, the present application discloses a housing with a front portion and a rear portion, and wherein said image capture section further comprises a front sealed modular unit comprising said front image sensor, lens and an associated front printed circuit board; a first side sealed modular unit comprising said first side image sensor, lens and an associated first side printed circuit board; a second side sealed module unit comprising said second side image sensor, lens and an associated second side printed circuit board, wherein the front, first side and second side printed circuit boards are coupled to each other; and a holder to encapsulate the front and side modular units from each other, the said holder having a front concave area to carry the front sealed modular unit, a first side compartment to carry the first side sealed modular unit, a second side compartment to carry the second side sealed modular, and a rectangular strip to carry an electrical cable connected to the coupled printed circuit boards of the front and side modular units, wherein the compartments have slots configured to carry the lens of the side modular units and wherein the holder is configured to occupy a third portion of the interior volume. 
     Optionally, the housing comprises a front portion and a rear portion, and wherein said image capture section further comprises: a front sealed modular unit comprising said front image sensor, lens and an associated front printed circuit board; a first side sealed modular unit comprising said first side image sensor, lens and an associated first side printed circuit board; a second side sealed module unit comprising said second side image sensor, lens and an associated second side printed circuit board, wherein the front, first side and second side printed circuit boards are coupled to each other; a holder comprising a front surface, a first side surface, a second side surface and a rear portion, wherein each of the front and side surfaces have a plurality of recesses configured to receive a plurality of connectors of the front and side modular units and wherein the rear portion is configured to carry an electrical cable to supply power to and transmit data from the front and side modular units; and a frame to support the holder, said frame comprising a front concave area to accommodate the front modular unit, a first side with a slot configured to carry the lens of the first side modular unit and a second side with a slot configured to carry the lens of the second side modular unit, wherein the holder and the frame are configured to occupy a third portion of the interior volume. 
     In conjunction with any of the above embodiments, the present application discloses an electronic circuit board of a tip section of a multi-viewing elements endoscope, the electronic circuit board comprising one or more optical assemblies, wherein each of said one or more optical assemblies comprise 1) at least one lens assembly and 2) an image sensor, wherein each of said one or more optical assemblies supports said at least one lens assembly and the image sensor, wherein the image sensor is placed in a folded position with a first surface facing a tip section end of the endoscope and an opposing second surface facing away from the tip section end of the endoscope, and wherein the first surface is a front surface and the second surface is a back surface, the first surface receiving an associated lens assembly of said at least one lens assembly; one or more illuminators associated with said at least one lens assembly; an upper base board and a lower base board adapted to support said one or more optical assemblies; and a plurality of grooves on said upper and lower base boards for supporting said one or more illuminators. 
     Optionally, the first surface is a glass surface. The second surface comprises an electronic chip. The second surface comprises a printed circuit board. Each of said one or more optical assemblies is a metal frame functioning as a heat sink for heat generated by one or more illuminators. 
     In conjunction with any of the above embodiments, the present application discloses an electronic circuit board of a tip section of a multi-viewing elements endoscope, the electronic circuit board comprising a plurality of viewing element holders, each viewing element holder supporting an optical lens assembly and an associated image sensor, and one or more illuminators associated with the optical lens assembly, and wherein each viewing element holder comprises one or more grooves for supporting the one or more illuminators. 
     Optionally, the image sensor is placed in a folded position with a first front surface facing a tip section end of the endoscope, and an opposing second back surface facing away from the tip section end of the endoscope, the first front surface receiving the associated optical lens assembly. The first front surface is a glass surface. The second back surface comprises an electronic chip. The second back surface comprises a printed circuit board. The electronic circuit board comprises an upper base board and a lower base board. The viewing element holder is a metal frame functioning as a heat sink for heat generated by said one or more illuminators. The metal component is placed between said plurality of viewing element holders to act as a heat sink for said one or more illuminators and support the viewing element holders fixedly between an upper and a lower base boards. 
     Optionally, the electronic circuit board comprises one or more viewing element holders of a tip section of a multi-viewing elements endoscope, wherein each of said one or more viewing element holder comprises at least one optical lens assembly, an image sensor, one or more illuminators, and one or more grooves for supporting the one or more illuminators. 
     Optionally, the tip section further comprises a front injector; at least one side injector; a front jet; at least one side jet; and a front working channel configured for insertion of a medical tool. The front jet and said front injector are positioned adjacent to each other and on a side of said front working channel. The front jet and said front injector are positioned on either side of said front working channel. 
     In conjunction with any of the above embodiments, the present application discloses an illuminator electronic circuit board assembly for a tip section of a multi-viewing elements endoscope, the illuminator electronic circuit board assembly comprising: a front illuminator electronic circuit board supporting one or more front illuminators associated with a front optical assembly, wherein said front optical assembly comprises a front lens assembly and a front image sensor; at least one side illuminator electronic circuit board supporting one or more side illuminators associated with one or more side optical assemblies wherein each of said one or more side optical assemblies comprise a side lens assembly and a side image sensor; and an upper base board and a lower base board adapted to hold therebetween said front and at least one side illuminator electronic circuit boards. 
     Optionally, the illuminator electronic circuit board assembly comprises a metal frame having front and rear portions supporting said front illuminator electronic circuit board and said at least one side illuminator electronic circuit board. The metal frame functions as a heat sink for said one or more front and side illuminators. The metal frame approximates an H shape with four side support walls extending outwardly at 90 degrees from each leg of said H shape and two front support walls are positioned at an end of and perpendicular to two of said four side support walls. The front illuminator electronic circuit board and said at least one side illuminator electronic circuit board are U shaped. The front illuminator electronic circuit board supports three illuminators. Two of said three illuminators are positioned between said upper and lower base boards and one of said three illuminators is placed above said upper base board. The at least one side illuminator electronic circuit board supports two illuminators. The at least one side illuminator electronic circuit board comprises two side illuminator electronic circuit boards, one on either side of said tip section. The tip section further comprises: a front injector; at least one side injector; a front jet; at least one side jet; and a front working channel configured for insertion of a medical tool. The front jet and said front injector are positioned adjacent to each other and on a side of said front working channel. The front jet and said front injector are positioned on either side of said front working channel. 
     In conjunction with any of the above embodiments, the present application discloses an electronic circuit board assembly for a tip section of a multi-viewing elements endoscope, the electronic circuit board assembly comprising: a base board configured to carry a first metal frame to support a front looking viewing element and a second metal frame to support a side looking viewing element; a front illumination circuit board comprising a front panel configured to carry three sets of front illuminators for illuminating a field of view of the front looking viewing element, and a side illumination circuit board comprising a side panel configured to carry at least one set of side illuminators for illuminating a field of view of the side looking viewing element. 
     Optionally, each of said three sets of front illuminators comprise 2, 3 or 4 illuminator elements. Each of said at least one side illuminators comprise 2, 3 or 4 illuminator elements. The front illumination circuit board and said side illumination circuit board approximate a U shape. The base board is roughly L shaped comprising: a first member extending in a y direction and in an x direction and a second member extending in a y direction and in an x direction, wherein the first member is integrally formed with the second member, wherein said first member and said second member lie in a same horizontal plane and wherein said second member extends from said first member at an angle of substantially 90 degrees. The front looking viewing element comprises a front looking image sensor and a corresponding lens assembly with an associated printed circuit board. The side looking viewing element comprises a side looking image sensor and a corresponding lens assembly with an associated printed circuit board. The axes of said first and second metal frames make an angle within a range of 70 to 135 degrees with each other. The axes of said first and second metal frames make an angle of 90 degrees with each other. 
     In conjunction with any of the above embodiments, the present application discloses a tip section of a multi-viewing elements endoscope, the tip section comprising: a front looking viewing element and three sets of front illuminators associated therewith; a side looking viewing element and two sets of side illuminators associated therewith; and an electronic circuit board assembly, comprising: a base board configured to carry a first metal frame to support the front looking viewing element and a second metal frame to support the side looking viewing element; and an illumination circuit board comprising a front foldable panel configured to carry the three sets of front illuminators for illuminating a field of view of the front looking viewing element, and a side panel configured to carry a set of side illuminators for illuminating a field of view of the side looking viewing element. 
     Optionally, the front looking viewing element comprises a front looking image sensor and a corresponding lens assembly with an associated printed circuit board. The side looking viewing element comprises a side looking image sensor and a corresponding lens assembly with an associated printed circuit board. The axes of said first and second metal frames make an angle within a range of 70 to 135 degrees with each other. The axes of said first and second metal frames make an angle of 90 degrees with each other. The tip section further comprises a tip cover and a fluid channeling component. The diameter of said tip section is less than 11 millimeters. The diameter of said tip section is 10.5 millimeters. The fluid channeling component comprises a front working channel adapted for insertion of a medical tool; a front jet channel adapted to clean a body cavity into which said endoscope is inserted; and an injector opening having a nozzle aimed at the front looking viewing element and associated illuminators. 
     Optionally, the fluid channeling component further comprises a side injector opening having a nozzle aimed at the side looking viewing element and associated illuminators. The fluid channeling component further comprises at least one side jet channel opening. The front working channel is adapted to apply suction. The front working channel has a diameter ranging from 2.8 to 4.8 millimeters. The front working channel has a diameter ranging from 3.2 to 3.5 millimeters. The front working channel has a diameter ranging from 3.8 to 4.2 millimeters. 
     In conjunction with any of the above embodiments, the present application discloses an interface unit configured to functionally associate with an endoscope system which comprises at least two simultaneously operating imaging channels associated with at least two displays, respectively, wherein the interface unit comprises: an image processor functionally associated with said at least two imaging channels and configured to generate images comprising image data received simultaneously from said at least two imaging channels, and an interface unit display, functionally associated with said image processor, wherein images generated by said image processor and comprising image data from said at least two imaging channels are displayable on said interface unit display. 
     Optionally, each imaging channel is associated with an image capturing device, respectively. The interface unit display is substantially portable. The interface unit display is functionally associated with said image processor wirelessly. The image capturing devices capture video images, and said image data in each of said at least two imaging channels comprise an incoming video stream corresponding to video images, and said image processor is configured to generate a single video stream displayable on said interface unit display, so that reduced-size images corresponding to each incoming video stream are simultaneously displayed on said interface unit display. The image processor is configured to generate a single video stream from the at least two incoming video streams substantially in real time. 
     Optionally, the interface unit further comprises an interface unit computer operating a files managing system and comprising a files storage module, wherein said interface unit computer is configured to generate and store in said files storage module files of images generated by said image processor. The interface unit further comprises a user interface module allowing a user to command said computer. 
     Optionally, the user interface module comprises a touch screen. The interface unit further comprises a communication channel configured to allow communication between said interface unit computer and a computer network at least for transferring files between said interface unit computer and said computer network. The computer network is a local computer network. The local computer network is a hospital network. The computer network is the Internet. The communication channel comprises a LAN communication interface port, and operates an Internet Protocol. The communication channel comprises a WiFi communication interface port. The communication channel comprises a video/audio communication interface port, configured for outputting a video stream. The communication interface port comprises an S-video or a composite port. The communication interface port comprises an HDMI port. The interface unit is configured to communicate through said communication interface port to a network computer, substantially in real time, a video stream generated by said image processor. The image processor is configured, when commanded, to capture a substantially single video frame in each of said imaging channels at the moment of said command and to communicate through said communication interface port to a network computer, a video stream comprising sequentially, still images of said single video frames wherein each such still image is included in the video stream for a pre-determined time period. 
     Optionally, the interface unit further comprises a synchronization module functionally associated with at least two of said image capturing devices, and configured for generating a synchronization signal for synchronizing incoming video streams in the imaging channels corresponding to said at least two image capturing devices. 
     In conjunction with any of the above embodiments, the present application discloses a method for capturing images using an interface unit in an endoscope system, said endoscope system comprising a plurality of simultaneously operating imaging channels, said interface unit having an interface unit display and capable of receiving and individually capturing an image from each one of said plurality of imaging channels, said method comprising the steps of: triggering an image capture event; displaying a first image from a first imaging channel of said plurality of imaging channels on said interface unit display; sending a first trigger pulse from said interface unit to an image capture computer to notify said image capture computer to save a digital copy of said first image on a non-volatile medium; displaying a second image from a second imaging channel of said plurality of imaging channels on said interface unit display; and sending a second trigger pulse from said interface unit to an image capture computer to notify said image capture computer to save a digital copy of said second image on a non-volatile medium, wherein, said first and second images are captured and saved sequentially and the original aspect ratio of said first and second images is preserved. 
     Optionally, said triggering an image capture event is accomplished by pressing a button on the endoscope of said endoscope system. The triggering an image capture event is accomplished by pressing a button on said interface unit. The interface unit display includes a touchscreen and said triggering an image capture event is accomplished by pressing a portion of said touchscreen. The interface unit and said capture computer are connected via a serial connection. 
     In conjunction with any of the above embodiments, the present application discloses a system of displaying videos generated in a native aspect ratio corresponding to a left-side looking, a front-looking and a right-side looking viewing element of an endoscopic tip, the system comprising: a left-side wide-screen monitor for displaying a first video from the left-side looking viewing element; a center square monitor for displaying a second video from the front-looking viewing element; a right-side wide-screen monitor for displaying a third video from the right-side looking viewing element; and a main control unit for aligning and modulating a native aspect ratio of the first and third videos, wherein said first video is right-aligned and said third video is left-aligned, and wherein said left-side, center and right-side monitors are placed contiguously so that the respective bottom edges of each of said first, second, and third videos are at a substantially same level. 
     Optionally, the native aspect ratio is 4:3 or 5:4. The main control unit modulates the native aspect ratio of said first and third videos by no more than 30%. The main control unit modulates the native aspect ratio of said first and third videos by 5%, 10%, 15%, 20%, 25% or 30%. The main control unit modulates the native aspect ratio of said first and third videos by 0%. The left-side and right-side monitors have respective longer edges horizontal. The left-side, center and right-side monitors are placed linearly. The first portion to the left of said right-aligned first video and a second portion to the right of said left-aligned third video, comprise a plurality of patient related information. 
     In conjunction with any of the above embodiments, the present application discloses a method of displaying videos generated in a native aspect ratio corresponding to a left-side looking, a front-looking and a right-side looking viewing element of an endoscopic tip, the method comprising: displaying a first video from the left-side looking viewing element onto a left-side wide-screen monitor; displaying a second video from the front-looking viewing element onto a center square monitor; displaying a third video from the right-side looking viewing element onto a right-side wide-screen monitor; and aligning and modulating the native aspect ratio of the first and third videos, wherein said first video is right-aligned and said third video is left-aligned, and wherein said first video, second video, and third video are positioned contiguously so that respective top edges of said videos are at a substantially same level. 
     Optionally, the native aspect ratio is 4:3 or 5:4. The native aspect ratio of said first and third videos is modulated by no more than 30%. The native aspect ratio of said first and third videos is modulated by 5%, 10%, 15%, 20%, 25% or 30%. The native aspect ratio of said first and third videos is modulated by 0%. The left-side and right-side monitors have respective longer edges horizontal. The left-side, center and right-side monitors are placed linearly. The first portion to the left of said right-aligned first and a second portion to the right of said left-aligned third video, comprise a plurality of patient related information. 
     In conjunction with any of the above embodiments, the present application discloses a system of displaying videos generated in a native aspect ratio corresponding to a left-side looking, a front-looking and a right-side looking viewing element of an endoscopic tip, the system comprising: a left-side wide-screen monitor for displaying a first video from the left-side looking viewing element; a center wide-screen monitor for displaying a second video from the front-looking viewing element; a right-side wide-screen monitor for displaying a third video from the right-side looking viewing element; and a main control unit for aligning, rotating and modulating the native aspect ratio of at least one of said first, second or third videos, wherein said left-side, center and right-side monitors are placed contiguously. The left-side, center and right-side monitors are integrated within a unitary frame encasement. Optionally, the left-side and right-side monitors are placed at an angle ‘N’ with reference to said center monitor. The angle ‘N’ may range from 10 to 30 degrees. 
     Optionally, the native aspect ratio is 4:3 or 5:4. The native aspect ratio of said first and third videos is modulated by no more than 30%. The native aspect ratio of said first and third videos is modulated by 5%, 10%, 15%, 20%, 25% or 30%. The left-side and right-side monitors have respective longer edges horizontal. The left-side, center and right-side monitors are placed linearly. The first portion to the left of said right-aligned first and a second portion to the right of said left-aligned third video, comprise a plurality of patient related information. The main control unit modulates the native aspect ratio of said first, second and third videos by 0%. The left-side and right-side widescreen monitors have respective longer edges horizontal and said center widescreen monitor has a shorter edge horizontal. The bottom edges of said left-side, center and right-side widescreen monitors are at a substantially same level. The first, second and third videos are respectively right, bottom and left-aligned. The second video is also rotated for display on said center widescreen monitor. A first portion on the left of said right-aligned first video, a second portion on the top of said bottom-aligned second video and a third portion on the right of said left-aligned third video, comprise plurality of patient related information. The top edges of said left-side, center and right-side widescreen monitors are at a substantially same level. The first, second and third videos are respectively right, top and left-aligned. The second video is also rotated for display on said center widescreen monitor. The first, second and third videos are respectively right, vertically-center and left aligned. The left-side, center and right-side widescreen monitors have respective shorter edges horizontal. The respective centroids of said left-side, center and right-side monitors are at a substantially same level. The first, second and third videos are all bottom-aligned. The first, second and third videos are all rotated for display on said respective left-side, center and right-side widescreen monitors. The first, second and third portions to the top of said bottom aligned first, second and third videos, comprise a plurality of patient related information. The first, second and third videos are all top-aligned. The left-side, center and right-side monitors are integrated within a unitary frame encasement. Optionally, the left-side and right-side monitors are placed at an angle ‘N’ with reference to said center monitor. The angle ‘N’ may range from 10 to 30 degrees. 
     In conjunction with any of the above embodiments, the present application discloses a method of displaying videos generated in a native aspect ratio corresponding to a left-side looking, a front-looking and a right-side looking viewing element of an endoscopic tip, the method comprising: displaying a first video from the left-side looking viewing element onto a left-side wide-screen monitor; displaying a second video from the front-looking viewing element onto a center wide-screen monitor; displaying a third video from the right-side looking viewing element onto a right-side wide-screen monitor; and aligning, rotating and modulating the native aspect ratio of at least one of said first, second or third videos, wherein a top edge and a bottom edge of each of said first, second, and third videos are linearly contiguous. 
     In conjunction with any of the above embodiments, the present application discloses a system of displaying first, second and third videos generated in a native aspect ratio corresponding to a left-side looking, a front-looking and a right-side looking viewing element of an endoscopic tip, the system comprising: a monitor; and a main control unit for combining the first, second and third videos into a resultant single video frame, wherein said resultant single video frame represents an integrated field of view of said left-side looking, front-looking and right-side looking viewing elements, wherein said main control unit slices said resultant single video frame to generate modulated left, center and right video frames for contiguous display on said monitor, and wherein said modulated left and right video frames are displayed as skewed with respect to said modulated center video frame. 
     Optionally, the center video frame comprises a sum of X degrees of views on either side of a center of the integrated field of view of the resultant single video frame and wherein the left and right video frames comprise respective remaining left and right portions of the resultant single video frame. X is approximately 15 degrees. X ranges from 15 degrees up to 30 degrees. The left, center and right video frames are separated by black image stripes. The black image stripes are no more than 6 inches wide. The native aspect ratio is 4:3 or 5:4. The main control unit modulates the left, center and right video frames by no more than 30%. 
     In conjunction with any of the above embodiments, the present application discloses a method of displaying first, second and third videos generated in a native aspect ratio corresponding to a left-side looking, a front-looking and a right-side looking viewing element of an endoscopic tip, the method comprising: combining the first, second and third videos into a resultant single video frame, wherein said resultant single video frame represents an integrated field of view of said left-side looking, front-looking and right-side looking viewing elements; and slicing said resultant single video frame to generate modulated left, center and right video frames for contiguous display on a monitor, wherein said modulated left and right video frames are displayed as skewed with respect to said modulated center video frame. 
     Optionally, the center video frame comprises a sum of X degrees of views on either side of a center of the integrated field of view of the resultant single video frame and wherein the left and right video frames comprise respective remaining left and right portions of the resultant single video frame. X is approximately 15 degrees. X ranges from 15 degrees up to 30 degrees. The left, center and right video frames are separated by black image stripes. The black image stripes are no more than 6 inches wide. 
     In conjunction with any of the above embodiments, the present application discloses a system of displaying one of first, second and third videos generated in a native aspect ratio corresponding to a left-side looking, a front-looking and a right-side looking viewing element of an endoscopic tip, the system comprising: a monitor; and a main control unit for slicing selected one of said first, second and third videos to generate modulated left, center and right video frames for contiguous display on said monitor, wherein said modulated left and right video frames are displayed as skewed with respect to said modulated center video frame. 
     In conjunction with any of the above embodiments, the present application discloses a method of displaying one of first, second and third videos generated in a native aspect ratio corresponding to a left-side looking, a front-looking and a right-side looking viewing element of an endoscopic tip, the method comprising: selecting one of said first, second and third videos for display on a monitor; and slicing said selected one of said first, second and third videos to generate modulated left, center and right video frames for contiguous display on said monitor, wherein said modulated left and right video frames are displayed as skewed with respect to said modulated center video frame. 
     In conjunction with any of the above embodiments, the present application discloses an endoscope configured to provide quasi-simultaneous N views, N being greater than 1, said endoscope comprising N optical systems configured to collect light from directions associated with said N views, and further comprising M image capturing devices, where M is smaller than N, and said image capturing devices are configured to capture light collected by said N optical systems, thereby providing N views quasi-simultaneously. Optionally, at least one of said M image capturing devices comprises a CCD. M is approximately 1. The image capturing device comprises a single planar light sensitive surface. Each of the optical systems is configured to transfer collected light onto an associated portion of said planar light-sensitive surface. N is approximately 3. The first optical system collects light from a first direction substantially facing said light sensitive surface, and a second optical system and a third optical system, respectively, collect light from directions substantially perpendicular to said first direction. At least two of said optical systems are configured to transfer collected light onto a same portion of said planar light-sensitive surface. 
     Optionally, the endoscope further comprises a step-wise rotating optical element configured to be controllably positioned in at least two positions corresponding to said at least two optical systems, respectively, wherein in each such position said step-wise rotating optical element allows transfer of collected light from said respective optical system to said portion of said planar light-sensitive surface. The step-wise rotating optical element comprises a mirror. The mirror comprises a semi transparent portion. The step-wise rotating optical element comprises a lens. The endoscope further comprises at least one shutter operable to be shut and opened synchronously with said step-wise rotating optical element. The image capturing device comprises N planar light sensitive surfaces, and each of said optical systems is configured to transfer light to one of said N planar light sensitive surfaces, respectively. The image capturing device is substantially rigid and said N planar light sensitive surfaces are tilted at a fixed angle relative to one another. The image capturing device comprises a substantially flexible portion allowing to controllably tilt at an angle one of said N planar light sensitive surfaces relative to another one of said N planar light sensitive surfaces. The image capturing device comprises two planar light sensitive surfaces, aligned back to back thereby facing substantially opposite directions. M is greater than one and N is greater than two and at least two of said optical systems transfer light onto a light sensitive planar element of one of said image capturing devices. M is equal to two and N is equal to three. 
     In conjunction with any of the above embodiments, the present application discloses an endoscopic tip comprising: a first lens positioned on a front face of said tip; a second lens positioned on a lateral side of said tip; a third lens positioned on a lateral side of said tip and substantially opposite said second lens; an imager having a plurality of light sensitive surfaces; a first light guide for directing light from said first lens to one of said plurality of light sensitive surfaces; a second light guide for directing light from said second lens to a second of said plurality of light sensitive surfaces; and, a third light guide for directing light from said third lens to a third one of said plurality of light sensitive surfaces, wherein light waves passing through each of said first, second, and third light guides are isolated from each other. 
     In conjunction with any of the above embodiments, the present application discloses an endoscopic tip comprising: a first lens positioned on a front face of said tip; a second lens positioned on a lateral side of said tip; a third lens positioned on a lateral side of said tip and substantially opposite said second lens; a first imager having a first light sensitive surface; a second imager having a plurality of light sensitive surfaces; a first light guide for directing light from said first lens to said first light sensitive surface of said first imager; a second light guide for directing light from said second lens to a first one of said plurality of light sensitive surfaces of said second imager; and, a third light guide for directing light from said third lens to a second one of said plurality of light sensitive surfaces of said second imager, wherein light waves passing through each of said first, second, and third light guides are isolated from each other. 
     In conjunction with any of the above embodiments, the present application discloses an endoscopic tip comprising: a first lens positioned on a front face of said tip; a second lens positioned on a lateral side of said tip; a third lens positioned on a lateral side of said tip and substantially opposite said second lens; a double-sided imager having a first side and a second side wherein said first side is substantially opposite said second side, further wherein said first side comprises a first light sensitive surface and said second side comprises a plurality of light sensitive surfaces; a first light guide for directing light from said first lens to said first light sensitive surface of said first side of said double-sided imager; a second light guide for directing light from said second lens to a first one of said plurality of light sensitive surfaces of said second side of said double-side imager; and a third light guide for directing light from said third lens to a second one of said plurality of light sensitive surfaces of said second side of said double-sided imager, wherein light waves passing through each of said first, second, and third light guides are isolated from each other. 
     In conjunction with any of the above embodiments, the present application discloses a main control unit connected to an image capture section of an endoscope using a utility tube, wherein the image capture section comprises a front viewing element along with associated at least one front illuminator, a first side viewing element along with associated at least one first side illuminators and a second side viewing element along with associated at least one second side illuminators, the main control unit comprising: a video processing system comprising a camera circuit board, a power supply, an electronic memory and a plurality of interfaces and additional processing elements; an electrical cable that runs through the utility tube to connect the front and side viewing elements and associated illuminators with the camera circuit board, wherein a set of N signals are configured to be transmitted between the camera circuit board and the image capture section, wherein M signals out of the N signals are shared so that N&lt;36 and wherein the camera board processes the M signals to generate signals specific to each of the viewing elements. 
     Optionally, the M signals comprise synchronization signals for the viewing elements. The M signals comprise clock signals for the viewing elements. The M signals comprise supply voltage of the viewing elements. The electrical cable has a diameter ranging from 2 to 2.5 millimeters. 
     In conjunction with any of the above embodiments, the present application discloses an image capture section or tip where a maximum volume of the image capture section ranges from 2.75 cm 3  to 3.5 cm 3 , where each of the viewing elements is configured to generate a field of view ranging from 120 to 180 degrees, a depth of field ranging from 3 to 100 mm and a peripheral distortion of less than 80% without reliance on any aspherical components, and a maximum focal length in a range of 1 to 1.4 mm. Optionally, the depth of field ranges from 3.5 to 50 mm. The maximum volume of the image capture section is 3.12 cm 3  and maximum focal length of said viewing elements is approximately 1.2 mm. The field of views of the front and at least one of side viewing element intersects over a depth of field ranging from 3 to 100 mm. The field of views of the front and at least one side viewing element intersects within a distance of 15 mm from the side viewing element. 
     In conjunction with any of the above embodiments, the present application discloses a method for operating an endoscope with multiple viewing elements, the method comprising: generating a front view using a front-pointing viewing element located on a front panel of a tip section of the endoscope; generating one or more side views using one or more side-pointing viewing elements located at or in proximity to a distal end of said tip section, wherein fields of view of said front and one or more side viewing elements overlap; displaying said front and side views in real-time on at least one display; generating data indicative of which display should be selected based upon an interaction with an interface on a handle of the endoscope; and switching between said front and side views on the at least one display based upon the generated data. 
     Optionally, the handle comprises a plurality of buttons, wherein manipulation of said buttons causes said display to zoom in and out, record, capture or freeze images in at least one of said front and side views. The front and side views are displayed on a single screen. The front and side views are displayed on different screens. The handle comprises a plurality of buttons and wherein manipulation of said buttons causes said at least one display to record, capture or freeze images in all of said front and side views concurrently. 
     In conjunction with any of the above embodiments, the present application discloses a method for operating an endoscope with multiple viewing elements, the method comprising: generating a front view using a front-pointing viewing element located in a tip section of the endoscope; generating at least one side view using at least one side-pointing viewing element located at or in proximity to a distal end of said tip section; displaying said front and side views concurrently and in real-time on at least one display; generating data indicative of which display should be selected based upon a manipulation of at least one button on a endoscope handle; and performing at least one action selected from recording, zooming or freezing, said at least one selected action being performed on the front view, the at least one side view, or both, based upon the generated data, wherein at least one icon or indicator is also displayed related to said at least one selected action. 
     Optionally, the method further comprises the step of displaying a timer that visually shows a progression of the endoscope through an anatomical region based on time. The timer counts down from a pre-set amount of time, as the endoscope progresses. 
     In conjunction with any of the above embodiments, the present application discloses an endoscope with multiple viewing elements, comprising: a front-pointing viewing element located in a tip section of the endoscope for generating a front view; at least one side-pointing viewing element located at or in proximity to a distal end of said tip section for generating at least one side view; one or more displays for displaying said front and side views concurrently and in real-time; at least one button on an endoscope handle that can be manipulated to generate data indicative of which display should be selected; and processing means for performing at least one action selected from recording, zooming or freezing, the at least one selected action being performed on the front view, the at least one side view, or both, based upon the generated data, wherein at least one icon or indicator is also displayed related to said at least one selected action. Optionally, the processing means comprises an FPGA processor and an MPEG digital signal processor. 
     In conjunction with any of the above embodiments, the present application discloses a method of visualizing navigation path way of an endoscope assembly, wherein said endoscope assembly comprises a tip section having a front-pointing viewing element and two side-pointing viewing elements, the method comprising: inserting the endoscope assembly into a lumen of a body cavity; navigating the endoscope assembly through the lumen, wherein said lumen defines a navigation pathway and wherein said navigation pathway comprises a plurality of junctures in which the pathway changes substantially; operating the endoscope assembly to display a video output from each of the front and side-pointing viewing elements on to at least one monitor, said video output representative of the navigation pathway within the body cavity; and maneuvering the endoscope assembly through the lumen when obstructed by said plurality of junctures, wherein said maneuvering is guided by at least one visual highlight on said at least one monitor. 
     In conjunction with any of the above embodiments, the present application discloses a service channel connector comprising: at least one service channel opening positioned at a proximal end of the connector; a working channel opening positioned at a distal end of the connector, wherein said service channel opening and working channel opening are in communication via an intermediate channel for inserting medical instruments therethrough, the working channel opening being coupled with an insertion tube of an endoscope; a front wall comprising a first portion, a second portion, and a third portion; a back wall, comprising a first portion, a second portion, and a third portion, each portion having a substantially flat surface; and two side walls. 
     Optionally, the service channel connector of claim  1  wherein said first, second and third portions of said front wall further comprise four portions each, connected at an angle to one another, and wherein said first, second and third portions of said back wall are substantially straight, rectangular and without any surface indentations. The two side walls approximate a “Y” shape. The service channel connector further comprises a suction channel. The intermediate channel is a service channel. The intermediate channel is a combined channel formed from a service channel and a suction channel. The service channel connector comprises a first section and a second section, wherein said first and second sections are fixedly connected to each other forming the service channel connector. The first section and the second section are joined together by using a laser welding process. The second section is a mirror image of the first section. The first section and the second section are joined together by aligning one or more edges of the two sections leaving no gap between the two sections along a joint line. The first section and the second section are fabricated using a milling process. The first section and the second section comprise smooth internal surfaces. When measured from said proximal end to said distal end and along the back wall, the connector has a length in a range of approximately 15 to 21 millimeters. The working channel opening has an internal diameter in a range of approximately 2.5-8 millimeters. 
     In conjunction with any of the above embodiments, the present application discloses an endoscope assembly comprising a handle for connecting the endoscope to a control unit, the handle comprising a Y-shaped service channel connector comprising: a first section and a second section, each section comprising at least a service channel opening coupled with a working channel opening via an intermediate channel for inserting medical instruments therethrough, wherein said first and second section are fixedly connected to each other forming the service channel connector, the first section being a mirror image of the second section. Each section further comprises a suction channel. The intermediate channel is a service channel. The intermediate channel is a combined channel formed from a service channel and a suction channel. The first section and the second section are fixably connected to each by using a laser welding process. 
     Optionally, the first section and the second section are fixably connected to each other leaving at least one service channel opening at a top proximal end of the service channel connector and at least one working channel opening at a bottom distal end of the service channel connector, the at least one service channel opening being used for inserting one or more medical instruments into an insertion tube of an endoscope via the working channel opening. The first section and the second section are fixably connected to each other by aligning one or more edges of the two portions leaving no gap between the two portions along a line of joining. The first section and the second section are fabricated using a milling process. The internal surfaces of the first section and the second section are smooth. 
     The presently disclosed embodiments enable a plurality of innovative medical procedures. In one embodiment, the present application discloses an improved endoscopic mucosal resection procedure comprising inserting an endoscope into a body cavity and positioned a tip of said endoscope next to a target tissue; inserting an injection needle through a front working channel in said endoscope and positioning said injection needle proximate said target tissue; injecting fluid into the target tissue using said injection needle; inserting a grasping forceps device through a first side service channel of the endoscope; inserting a dissection device through a second side service channel of the endoscope; dissecting the target tissue from the submucosa of the body cavity; withdrawing the dissection tool from the second side service channel; inserting a retrieval net through the second side service channel; and using the grasping forceps to place the dissected target tissue into the retrieval net. Optionally the dissection device is a snare, needle, knife, or other cutting tool. 
     In another embodiment, the present application discloses another improved endoscopic mucosal resection procedure comprising inserting an endoscope into a body cavity and positioned a tip of said endoscope next to a target tissue; inserting an injection needle through a first channel in said endoscope and positioning said injection needle proximate said target tissue; injecting fluid into the target tissue using said injection needle; inserting a grasping forceps device through a second channel of the endoscope; inserting a dissection device through a third channel of the endoscope; dissecting the target tissue from the submucosa of the body cavity; withdrawing the dissection tool from the third channel; inserting a retrieval net through the third channel; and using the grasping forceps to place the dissected target tissue into the retrieval net. Optionally the dissection device is a snare, needle, knife, or other cutting tool. 
     In another embodiment, the present application discloses another improved endoscopic retrograde cholangiopancreatography procedure comprising inserting an endoscope into a body cavity and positioning it proximate a target papilla; inserting a guidewire through a first channel, such as the front working channel, inserting a grasper through a second channel, such as one of two side service channels; using the grasper to position the papilla in a position to facilitate the cannulation of the papilla with the guidewire; inserting a sphincterotome through a third channel, such as the second of two side service channels; using the sphincterotome to cut the papilla; withdrawing the sphincterotome; inserting a balloon over the guidewire; positioning the balloon in the papilla and inflating it to widen the sphincter; insert other devices through the third channel to perform a task. Optionally, the other devices can be stone baskets, stents, injection needles, ablation devices, biopsy forceps, and/or cytology brushes. 
     The aforementioned and other embodiments of the present shall be described in greater depth in the drawings and detailed description provided below. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and other features and advantages of the present invention will be appreciated, as they become better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein: 
         FIG.  1 A  shows a semi-pictorial view of a multi-camera endoscopy system, according to some embodiments; 
         FIG.  1 B  shows a perspective view of one embodiment of a control panel of a main control unit of a multi-camera endoscopy system; 
         FIG.  1 C  shows a perspective view of a first multiple viewing element tip section configuration, according to some embodiments; 
         FIG.  1 D  shows a perspective view of a second multiple viewing element tip section configuration, according to some embodiments; 
         FIG.  1 E  shows a perspective view of a third multiple viewing element tip section configuration, according to some embodiments; 
         FIG.  1 F  shows a perspective view of a fourth multiple viewing element tip section configuration, according to some embodiments; 
         FIG.  1 G  shows a perspective view of a multi-camera endoscope, according to some embodiments; 
         FIG.  1 H  shows a perspective view of a multi-camera endoscope, according to other embodiments; 
         FIG.  1 I  shows a first cross-sectional view of a tip section of a multi-camera endoscope, according to some embodiments; 
         FIG.  1 J  shows a second cross-sectional view of a tip section of a multi-camera endoscope, according to some embodiments; 
         FIG.  2 A  shows an exploded perspective view of a tip section of an endoscope assembly according to an embodiment; 
         FIG.  2 B  shows an exploded perspective view of a tip section of an endoscope assembly according to another embodiment; 
         FIG.  3 A  shows a perspective view of a fluid channeling component of an endoscope assembly according to a first embodiment; 
         FIG.  3 B  shows a perspective view of a fluid channeling component of an endoscope assembly according to a second embodiment; 
         FIG.  4 A  shows a perspective view of a fluid channeling component of an endoscope assembly according to a third embodiment; 
         FIG.  4 B  shows a perspective view of a fluid channeling component of an endoscope assembly according to a fourth embodiment; 
         FIG.  4 C  shows a perspective view of a fluid channeling component along with an exploded view of a corresponding tip cover of an endoscope assembly, according to some embodiments; 
         FIG.  5 A  shows a first perspective view of a fluid channeling component of the tip section of  FIG.  61 A ; 
         FIG.  5 B  shows a second perspective view of the fluid channeling component of the tip section of  FIG.  61 A ; 
         FIG.  6 A  shows a perspective view of a fluid channeling component of an endoscope assembly according to some embodiments; 
         FIG.  6 B  shows a perspective view of a fluid channeling component of an endoscope assembly according to some embodiments; 
         FIG.  6 C  shows a perspective view of a fluid channeling component of an endoscope assembly according to some embodiments; 
         FIG.  7    illustrates a perspective view of a tip section of an endoscope assembly showing a fluid channeling component, in accordance with an embodiment of the present specification; 
         FIG.  8    schematically depicts an isometric proximal view of an inner part of an endoscope tip section according to an embodiment of the current specification; 
         FIG.  9 A  schematically depicts a partially disassembled tip section of an endoscope having a insufflation and/or irrigation (I/I) channels manifold internal to a unitary fluid channeling component, according to a first embodiment of the current specification; 
         FIG.  9 B  schematically depicts an isometric cross section of an inner part of a tip section, having a I/I channels manifold internal to a unitary fluid channeling component, according to a first embodiment of the current specification; 
         FIG.  9 C  schematically depicts an isometric cross section of a unitary fluid channeling component of an inner part of a tip section having a I/I channels manifold internal to the unitary fluid channeling component, according to a first embodiment of the current specification; 
         FIG.  9 D  schematically depicts another isometric cross section of an inner part of a tip section, showing the unitary fluid channeling component having a channels manifold internal to it, according to a first embodiment of the current specification; 
         FIG.  10 A  schematically depicts an isometric view of a partially disassembled tip section of an endoscope having a I/I channels manifold partially internal and partially external to the unitary fluid channeling component of the tip section, according to a second embodiment of the current specification; 
         FIG.  10 B  schematically depicts an isometric view of an inner part of a tip section having a channels manifold partially internal and partially external to the unitary fluid channeling component of the tip section, according to a second embodiment of the current specification; 
         FIG.  10 C  schematically depicts an isometric cross section of the inner part of a tip section a having channels manifold partially internal and partially external to the unitary fluid channeling component of the tip section, according to a second embodiment of the current specification; 
         FIG.  11 A  schematically depicts an isometric view of a partially disassembled tip section of an endoscope having a I/I channels manifold partially internal and partially external to the unitary fluid channeling component of the tip section, according to a third embodiment of the current specification; 
         FIG.  11 B  schematically depicts an isometric view of an inner part of a tip section having a I/I channels manifold partially internal and partially external to a unitary fluid channeling component of the inner part of the tip section, according to a third embodiment of the current specification; 
         FIG.  11 C  schematically depicts an isometric cross section of the unitary fluid channeling component, according to a third embodiment of the current specification; 
         FIG.  11 D  schematically depicts another isometric cross section of an inner part of a tip section having a I/I channels manifold partially internal and partially external to a unitary fluid channeling component of the inner part of the tip section, according to a third embodiment of the current specification; 
         FIG.  12 A  schematically depicts an isometric cross section view of an assembled tip section of an endoscope a having I/I channels manifold external to a unitary fluid channeling component of the inner part of the tip section, according to a fourth embodiment of the current specification; 
         FIG.  12 B  schematically depicts an isometric view of an inner part of a tip section having a I/I channels manifold external to the unitary fluid channeling component, according to a fourth embodiment of the current specification; 
         FIG.  12 C  schematically depicts an isometric cross section of a unitary fluid channeling component, according to a fourth embodiment of the current specification; 
         FIG.  13 A  schematically depicts an isometric view of an assembled tip section of an endoscope having a I/I channels manifold partially external to a unitary fluid channeling component of an inner part of the tip section, according to a fifth embodiment of the current specification; 
         FIG.  13 B  schematically depicts an isometric view of an inner part of a tip section having a I/I channels manifold partially external to the unitary fluid channeling component, according to a fifth embodiment of the current specification; 
         FIG.  13 C  schematically depicts another isometric view of an inner part of a tip section having a I/I channels manifold partially external to the unitary fluid channeling component, according to a fifth embodiment of the current specification; 
         FIG.  13 D  schematically depicts an isometric cross section of an endoscope tip section according to a fifth embodiment of the current specification; 
         FIG.  14 A  schematically depicts an isometric view of an assembled tip section of an endoscope having a I/I channels manifold external to a unitary fluid channeling component of an inner part of the tip section, according to a sixth embodiment of the current specification; 
         FIG.  14 B  schematically depicts an isometric view of a partially disassembled tip section of an endoscope having a I/I channels manifold external to the unitary fluid channeling component, according to a sixth embodiment of the current specification; 
         FIG.  15 A  schematically depicts an isometric proximal view of a main section of an inner part of an endoscope tip section, according to an embodiment of the current specification; 
         FIG.  15 B  schematically depicts an isometric cross section of the main section of  FIG.  15 A , according to an embodiment of the current specification; 
         FIG.  15 C  schematically depicts an isometric proximal view of the main section of  FIG.  15 A , having liquid and gas tubes connected thereto, according to an embodiment of the current specification; 
         FIG.  16    schematically depicts an isometric view of a folded flexible electronic circuit board carrying a front view camera, two side view cameras, and illumination sources, according to an embodiment of the current specification; 
         FIG.  17    schematically depicts an isometric view of a folded flexible electronic circuit board, according to an embodiment of the current specification; 
         FIG.  18    schematically depicts an isometric view of a flexible electronic circuit board in an unfolded, flat configuration, according to an embodiment of the current specification; 
         FIG.  19    schematically depicts an isometric exploded view of a folded flexible electronic circuit board, carrying cameras and illumination sources, and a flexible electronic circuit board holder, according to an embodiment of the current specification; 
         FIG.  20    schematically depicts an isometric assembled view of a folded flexible electronic circuit board, carrying cameras and illumination sources, and a flexible electronic circuit board holder, according to an embodiment of the current specification; 
         FIG.  21    schematically depicts an isometric assembled view of a folded flexible electronic circuit board carrying cameras and illumination sources, a flexible electronic circuit board holder, and a fluid channeling component, according to an embodiment of the current specification; 
         FIG.  22    schematically depicts an isometric view of a folded flexible electronic circuit board carrying cameras and illumination sources, a flexible electronic circuit board holder, a fluid channeling component, and a tip cover (in an exploded view), according to an embodiment of the current specification; 
         FIG.  23 A  shows a first exploded view of a tip section of a foldable electronic circuit board according to some embodiments; 
         FIG.  23 B  shows a second exploded view of a tip section of a foldable electronic circuit board according to some embodiments; 
         FIG.  23 C  shows a third exploded view of a tip section of a foldable electronic circuit board according to some embodiments; 
         FIG.  23 D  shows an assembled perspective view of a tip section of a foldable electronic circuit board, such as that shown in  FIG.  23 C , according to some embodiments; 
         FIG.  24 A  shows a first perspective view of a camera circuit board according to some embodiments; 
         FIG.  24 B  shows a second perspective view of a camera circuit board according to some embodiments; 
         FIG.  24 C  shows a third perspective view of a camera circuit board according to some embodiments; 
         FIG.  25    shows a perspective view of a flexible illumination circuit board according to some embodiments; 
         FIG.  26 A  shows a first perspective view of a foldable electronic circuit board according to some embodiments; 
         FIG.  26 B  shows a second perspective view of a foldable electronic circuit board according to some embodiments; 
         FIG.  26 C  shows a third perspective view of a foldable electronic circuit board according to some embodiments; 
         FIG.  26 D  shows a fourth perspective view of a foldable electronic circuit board according to some embodiments; 
         FIG.  27 A  shows a perspective view of an endoscope&#39;s tip section according to some embodiments; 
         FIG.  27 B  shows a perspective view of a fluid channeling component of the endoscopic tip section of  FIG.  27 A ; 
         FIG.  28 A  illustrates an upper base board and a lower base board associated with a fluid channeling component and adapted to support the optical assembly and illuminators of an endoscope, in accordance with an embodiment of the present specification; 
         FIG.  28 B  illustrates a top view of an upper base board adapted to support the optical assembly and illuminators of an endoscope, in accordance with an embodiment of the present specification; 
         FIG.  28 C  illustrates a bottom side view of a lower base board adapted to support the optical assembly and illuminators of an endoscope, in accordance with an embodiment of the present specification; 
         FIG.  29 A  illustrates the optical assembly and illuminators supported by a lower base board, where the upper base board shown in  FIG.  28 A  is removed; 
         FIG.  29 B  illustrates another view of the optical assembly supported by a lower base board as shown in  FIG.  29 A  with the illuminators removed; 
         FIG.  29 C  illustrates a bottom view of the optical assembly supported by a lower base board, as shown in  FIG.  29 B , where the illuminators are removed; 
         FIG.  30 A  illustrates an image sensor comprising two image sensor contact areas, in accordance with an embodiment of the present specification; 
         FIG.  30 B  illustrates a lens assembly being coupled with the image sensor, in accordance with an embodiment of the present specification; 
         FIG.  30 C  illustrates a metal frame positioned to support and hold the lens assembly and the associated image sensor, in accordance with an embodiment of the present specification; 
         FIG.  31 A  illustrates a viewing element holder for supporting a lens assembly, image sensor and side illuminators, in accordance with an embodiment of the present specification; 
         FIG.  31 B  illustrates grooves built in the viewing element holder for supporting the illuminators, in accordance with an embodiment of the present specification; 
         FIG.  32 A  illustrates a plurality of optical assemblies supported by viewing element holders and assembled to be placed in a tip of an endoscope, in accordance with an embodiment of the present specification; 
         FIG.  32 B  illustrates the assembly shown in  FIG.  32 A  coupled with an upper circuit board and a lower circuit board and associated with a fluid channeling component in a tip of an endoscope, in accordance with an embodiment of the present specification; 
         FIG.  33 A  illustrates a front illuminator electronic circuit board adapted for supporting the front illuminators of an endoscope, in accordance with an embodiment of the present specification; 
         FIG.  33 B  illustrates upper and lower base boards integrated with the front and side illuminator electronic circuit boards, in accordance with an embodiment of the present specification; 
         FIG.  34    illustrates optical assemblies and illuminators supported by an upper base board with the lower base board shown in  FIG.  33 A  removed, in accordance with an embodiment of the present specification; 
         FIG.  35 A  illustrates the metal frame and illuminator circuit boards as shown in  FIG.  34    with the optical assemblies and upper base board removed, in accordance with an embodiment of the present specification; 
         FIG.  35 B  illustrates a metal frame with the illuminator circuit boards shown in  FIG.  35 A  removed, in accordance with an embodiment of the present specification; 
         FIG.  36    illustrates a front illuminator electronic circuit board, in accordance with an embodiment of the present specification; 
         FIG.  37    illustrates a side illuminator electronic circuit board, in accordance with an embodiment of the present specification; 
         FIG.  38 A  illustrates a base board of an electronic circuit board assembly in accordance with an embodiment of the present specification; 
         FIG.  38 B  illustrates first and second metal frames for supporting a front looking and a side looking viewing element of an electronic circuit board assembly, in accordance with an embodiment of the present specification; 
         FIG.  38 C  illustrates a first intermediate assembly with metal frames placed on the base board of an electronic circuit board assembly, in accordance with an embodiment of the present specification; 
         FIG.  38 D  illustrates one embodiment of first and second printed circuit boards for inclusion with an electronic circuit board assembly; 
         FIG.  38 E  illustrates a second intermediate assembly formed by attaching printed circuit boards to a first intermediate assembly, in accordance with an embodiment of the present specification; 
         FIG.  38 F  illustrates an image sensor with a plurality of connector pins in accordance with an embodiment of the present specification; 
         FIG.  38 G  illustrates one embodiment of a third intermediate assembly formed by attaching image sensors to a second intermediate assembly; 
         FIG.  38 Ha  illustrates one embodiment of a front illumination circuit board; 
         FIG.  38 Hb  illustrates one embodiment of a side illumination circuit board; 
         FIG.  38 I  illustrates one embodiment of an assembled view of an electronic circuit board assembly of the present specification; 
         FIG.  38 J  illustrates one embodiment of a tip section of an endoscope formed by attaching a fluid channeling component to the electronic circuit board assembly of  FIG.  38 I ; 
         FIG.  38 K  illustrates one embodiment of a fluid channeling component as shown in  FIG.  38 J ; 
         FIG.  39 A  schematically depicts a cross section of an endoscope front head having multiple fields of view showing some details of the head according to an exemplary embodiment of the current specification; 
         FIG.  39 B  schematically depicts a cutout isometric view of an endoscope having multiple fields of view according to another exemplary embodiment of the current specification; 
         FIG.  39 C  schematically depicts another cutout isometric view of an endoscope having multiple fields of view according to an exemplary embodiment of the current specification; 
         FIG.  40    schematically depicts a cross section of a lens assembly of a camera head, according to an exemplary embodiment of the current specification; 
         FIG.  41 A  schematically illustrates example of light propagation within an objective lens system according to an exemplary embodiment of the current specification; 
         FIG.  41 B  schematically illustrates another example of light propagation within an objective lens system according to an exemplary embodiment of the current specification; 
         FIG.  41 C  schematically illustrates another example of light propagation within an objective lens system according to an exemplary embodiment of the current specification; 
         FIG.  42    shows various components of a modular endoscopic tip, according to one embodiment; 
         FIG.  43    illustrates one embodiment of a holder for the imaging modules; 
         FIG.  44    illustrates a top view of the modular imaging units, according to one embodiment of the present specification; 
         FIG.  45    illustrates a bottom view of the modular imaging units, according to one embodiment of the present specification; 
         FIG.  46    illustrates a perspective view of a side-pointing modular imaging unit, according to one embodiment of the present specification; 
         FIG.  47    illustrates a perspective view of a front-pointing modular imaging unit, according to one embodiment of the present specification; 
         FIG.  48    illustrates the modular nature of the various elements in the endoscopic tip, according to one embodiment of the present specification; 
         FIG.  49    illustrates a front-pointing imaging module assembled with side-pointing imaging modules, according to one embodiment of the present specification; 
         FIG.  50    illustrates a perspective view of assembled components with the modular holder, according to one embodiment of the present specification; 
         FIG.  51    illustrates another embodiment of the modular endoscopic tip; 
         FIG.  52    illustrates a detailed view of the coupling mechanism and the modular holder, according to one embodiment; 
         FIG.  53 A  provides a first perspective view of the connecting mechanism between the imaging modules, according to an embodiment; 
         FIG.  53 B  provides a second perspective view of the connecting mechanism between the imaging modules, according to an embodiment; 
         FIG.  54    illustrates a detailed view of the modular holder, according to one embodiment of the present specification; 
         FIG.  55 A  schematically depicts an isometric view of a tip section of an endoscope (including an electronic circuit board carrying cameras and illumination sources, and fluid channeling component), having a multi component tip cover (shown in an exploded view), according to an exemplary embodiment of the current specification; 
         FIG.  55 B  schematically depicts an isometric view of the tip section of  FIG.  55 A , having an assembled multi component tip cover, according to some exemplary embodiment of the current specification; 
         FIG.  56    schematically depicts an isometric view of a tip section of an endoscope (including an electronic circuit board carrying cameras and illumination sources, and a fluid channeling component), having a multi component tip cover (shown in an exploded view), according to an exemplary embodiment of the current specification; 
         FIG.  57    schematically depicts an exploded view of a multi component tip cover, according to an exemplary embodiment of the current specification; 
         FIG.  58 A  schematically depicts an isometric view of a tip section of an endoscope (including an electronic circuit board carrying cameras and illumination sources, and a fluid channeling component), having a multi component tip cover (shown in an exploded view), according to an exemplary embodiment of the current specification; 
         FIG.  58 B  schematically depicts an isometric view of the tip section of  FIG.  58 A , having a multi component tip cover (partially in an exploded view), according to an exemplary embodiment of the current specification; 
         FIG.  58 C  schematically depicts an isometric view of the tip section of  FIGS.  58 A and  58 B  having an assembled multi component tip cover, according to an exemplary embodiment of the current specification; 
         FIG.  59 A  shows a perspective side view of a tip section of an endoscope assembly according to some embodiments; 
         FIG.  59 B  shows a perspective rear view of a tip section of an endoscope assembly according to some embodiments; 
         FIG.  59 C  shows a well-defined or deep notch/depression of a side wall of a tip section of an endoscope assembly according to some embodiments; 
         FIG.  60 A  shows a first perspective view of a tip section of an endoscope assembly with a medical tool inserted through a side service channel thereof, according to some embodiments; 
         FIG.  60 B  shows a second perspective view of a tip section of an endoscope assembly with a medical tool inserted through a side service channel thereof, according to some embodiments; 
         FIG.  61 A  shows a perspective view of a tip section of an endoscope assembly comprising two independent side service channel openings in accordance with an embodiment of the present specification; 
         FIG.  61 B  shows a first perspective view of the tip section of the endoscope assembly of  FIG.  61 A  with a medical tool inserted through a side service channel thereof, according to an embodiment; 
         FIG.  61 C  shows a second perspective view of the tip section of the endoscope assembly of  FIG.  61 A  with a medical tool inserted through a side service channel thereof, according to another embodiment; 
         FIG.  62    shows an exploded view of the tip section of the endoscope assembly of  FIG.  2 A ; 
         FIG.  63    illustrates a perspective front view of a tip section of an endoscope assembly comprising two front working/service channels in close proximity, in accordance with an embodiment of the present specification; 
         FIG.  64    illustrates a tip of an endoscope, comprising front jet and nozzle openings adjacent to each other, in accordance with an embodiment of the present specification; 
         FIG.  65 A  shows a perspective view of a tip section of a multi jet endoscope assembly according to an embodiment of the present specification; 
         FIG.  65 B  shows a perspective first side view of the tip section of the multi-jet endoscope assembly of  FIG.  65 A ; 
         FIG.  65 C  shows a perspective second side view of the tip section of the multi jet endoscope assembly of  FIG.  65 A ; 
         FIG.  65 D  shows a perspective view of a fluid channeling component of the multi-jet endoscope assembly of  FIG.  65 A ; 
         FIG.  65 E  shows the multi jet endoscope assembly of  FIG.  65 A  being moved inside a body cavity; 
         FIG.  66    shows a side jet sprinkler attachment, in accordance with some embodiments of the specification; 
         FIG.  67 A  shows the position of side jet openings relative to side optical assemblies, in accordance with one embodiment; 
         FIG.  67 B  shows the position of side jet openings relative to side optical assemblies, in accordance with another embodiment; 
         FIG.  68 A  shows a perspective view of the tip cover of an endoscope assembly according to some embodiments; 
         FIG.  68 B  shows another perspective view of the tip cover of an endoscope assembly according to some embodiments; 
         FIG.  69 A  shows a perspective view of a tip section of an endoscope assembly according to some embodiments, without the tip cover; 
         FIG.  69 B  shows another perspective view of the tip section of an endoscope assembly according to some embodiments, without the tip cover; 
         FIG.  70    shows a side view of the tip section of an endoscope assembly according to some embodiments, without the tip cover; 
         FIG.  71    shows a cross-section view of the tip section of an endoscope assembly according to some embodiments, with the tip cover; 
         FIG.  72    shows a multi jet ring assembly of an endoscope assembly according to an embodiment; 
         FIG.  73    shows a side view of the multi jet ring assembly placed on a tip cover of an endoscope assembly, according to another embodiment; 
         FIG.  74 A  shows a perspective view of the multi-jet ring assembly placed on the tip cover of an endoscope assembly, according to some embodiments; 
         FIG.  74 B  shows another perspective view of the multi jet ring assembly placed on the tip cover of an endoscope assembly, according to some embodiments; 
         FIG.  75 A  shows a perspective view of the multi jet ring assembly detached from the tip cover of the endoscope assembly of  FIGS.  74 A and  74 B ; 
         FIG.  75 B  shows another perspective view of the multi jet ring assembly detached from the tip cover of the endoscope assembly of  FIGS.  74 A and  74 B ; 
         FIG.  76 A  is a cross-sectional view of a tip section of an endoscope assembly, with the tip cover and the multi jet ring assembly, according to some embodiments; 
         FIG.  76 B  is another cross-sectional view of a tip section of an endoscope assembly, with the tip cover and the multi jet ring assembly, according to some embodiments; 
         FIG.  77 A  illustrates a multi jet distributer pump, in accordance with an embodiment of the present specification; 
         FIG.  77 B  illustrates another view of the multi jet distributer pump of  FIG.  77 A , in accordance with an embodiment of the present specification; 
         FIG.  77 C  illustrates yet another view of the multi jet distributer pump of  FIG.  77 A , in accordance with an embodiment of the present specification; 
         FIG.  78 A  illustrates a distributer disc of a multi jet distributer, in accordance with an embodiment of the present specification; 
         FIG.  78 B  illustrates another view of the distributer disc of a multi jet distributer, in accordance with an embodiment of the present specification; 
         FIG.  79 A  is a block diagram illustrating the connection between a multi jet distributor and an endoscope, in accordance with an embodiment of the present specification; 
         FIG.  79 B  is a block diagram illustrating another connection between a multi jet distributor and an endoscope, in accordance with an embodiment of the present specification; 
         FIG.  80 A  illustrates a sectional view of a distributor disc of a multi jet distributor, in accordance with an embodiment of the present specification; 
         FIG.  80 B  illustrates another sectional view of a distributor disc of a multi jet distributor, in accordance with an embodiment of the present specification; 
         FIG.  81 A  shows a perspective view of a main connector employing a multi jet controller in accordance with an embodiment of the present specification; 
         FIG.  81 B  shows a first position of a multi jet controller shaft corresponding to a first control option of the multi-jet controller, according to one embodiment of the present specification; 
         FIG.  81 C  shows a second position of the multi jet controller shaft corresponding to the second control option of the multi jet controller, according to one embodiment of the present specification; 
         FIG.  82    shows a perspective view of a multi-camera endoscope according to one embodiment of the present specification; 
         FIG.  83    shows a perspective view of a full cross section removable tip section removed from the permanent section, in accordance with some exemplary embodiments of the specification; 
         FIG.  84    shows a perspective view of a full cross section removable tip section attached to the permanent section, in accordance with some exemplary embodiments of the specification; 
         FIG.  85    shows a perspective view of a partial cross section removable tip section removed from the permanent section, in accordance with some exemplary embodiments of the specification; 
         FIG.  86    shows a perspective view of a partial cross section removable tip section attached to the permanent section, in accordance with some exemplary embodiments of the specification; 
         FIG.  87 A  schematically depicts an endoscope system and an interface unit associated with the endoscope system according to an aspect of some embodiments; 
         FIG.  87 B  schematically depicts an embodiment of a tip of the endoscope of  FIG.  87 A ; 
         FIG.  88    schematically depicts a functional block diagram of the interface unit of  FIG.  87 A ; 
         FIG.  89    schematically depicts an exemplary layout of an endoscope system and an interface unit deployed in an operating room, according to one embodiment of the present specification; 
         FIG.  90    is a block diagram illustrating an exemplary video processing architecture, according to one embodiment of the present specification; 
         FIG.  91 A  is a first linear configuration of monitors for displaying a plurality of contiguous videos in accordance with an embodiment of the present specification; 
         FIG.  91 B  is a second linear configuration of monitors for displaying a plurality of contiguous videos in accordance with an embodiment of the present specification; 
         FIG.  91 C  is a third linear configuration of monitors for displaying a plurality of contiguous videos in accordance with an embodiment of the present specification; 
         FIG.  91 D  is a fourth linear configuration of monitors for displaying a plurality of contiguous videos in accordance with an embodiment of the present specification; 
         FIG.  91 E  is a fifth linear configuration of monitors for displaying a plurality of contiguous videos in accordance with an embodiment of the present specification; 
         FIG.  92 A  is a first embodiment of a non-linear configuration of monitors for displaying a plurality of contiguous videos; 
         FIG.  92 B  is a second embodiment of a non-linear configuration of monitors for displaying a plurality of contiguous videos; 
         FIG.  93 A  shows a first contiguous video feed group displayed on a single monitor in accordance with an embodiment of the present specification; 
         FIG.  93 B  shows a second contiguous video feed group displayed on a single monitor in accordance with an embodiment of the present specification; 
         FIG.  94    shows a panoramic view of video feeds generated by viewing elements of an endoscopic tip and displayed on three square monitors, according to one embodiment of the present specification; 
         FIG.  95 A  schematically depicts an embodiment of a tip of an endoscope configured to provide multiple views and having a single image capturing device; 
         FIG.  95 B  schematically depicts an embodiment of an image split to three fields as obtained from the image capturing device of  FIG.  95 A ; 
         FIG.  96    schematically depicts an embodiment of a tip of an endoscope configured to provide multiple views and having a single image capturing device and a rotatable optical element; 
         FIG.  97 A  schematically depicts one embodiment of a tip of an endoscope configured to provide multiple views and having a single image capturing device having several light sensitive elements; 
         FIG.  97 B  schematically depicts another embodiment of a tip of an endoscope configured to provide multiple views and having a single image capturing device having several light sensitive elements; 
         FIG.  98    schematically depicts an embodiment of a tip of an endoscope configured to provide three views and having two image capturing devices; 
         FIG.  99    schematically depicts an embodiment of a tip of an endoscope configured to provide three views and having a single double-sided image capturing device; 
         FIG.  100    is a table detailing an exemplary set of shared and unshared signals for each camera, according to one embodiment of the present specification; 
         FIG.  101    illustrates a camera circuit board with a plurality of inputs and outputs, according to one embodiment of the present specification; 
         FIG.  102    is a block diagram illustrating synchronization of video signals, according to one embodiment; 
         FIG.  103    is another block diagram illustrating synchronization of video signals, according to one embodiment of the present specification; 
         FIG.  104    illustrates one embodiment with multiple displays operated with a single endoscope; 
         FIG.  105 A  shows one exemplary configuration of the endoscope handle, according to one embodiment of the present specification; 
         FIG.  105 B  illustrates an indication of video recording on display, according to one embodiment; 
         FIG.  106 A  shows another exemplary configuration of the endoscope handle, according to another embodiment of the present specification; 
         FIG.  106 B  illustrates indications of various image management features, according to one embodiment; 
         FIG.  107    illustrates another embodiment of multiple displays being operated with a single endoscope; 
         FIG.  108    is a flow chart detailing the process of implementing an image manipulation feature, according to one embodiment of the present specification; 
         FIG.  109    illustrates exemplary critical navigation junctures during an endoscopic procedure; 
         FIG.  110 A  illustrates highlighting the areas of interest in the display image, according to one embodiment of the present specification; 
         FIG.  110 B  is a flowchart illustrating the steps involved in a method of visualizing a navigation pathway of an endoscope comprising a tip section having a front-pointing viewing element and two side-pointing viewing elements by using a highlighting feature; 
         FIG.  111 A  illustrates an endoscope handle comprising a service channel port, in accordance with an embodiment of the present specification; 
         FIG.  111 B  illustrates an exploded view of a service channel connector shown in  FIG.  111 A , in accordance with an embodiment of the present specification; 
         FIG.  112    is an illustration of a conventional service channel connector; 
         FIG.  113 A  illustrates a service channel connector, having an approximate Y-shape, in accordance with an embodiment of the present specification; 
         FIG.  113 B  is an external, cross-sectional view of a first section of a service channel connector having an approximate Y-shape, in accordance with an embodiment of the present specification; 
         FIG.  113 C  is an internal, cross-sectional view of a first section of a service channel having an approximate Y-shape, in accordance with an embodiment of the present specification; 
         FIG.  113 D  is an external, cross-sectional view of a second section of a service channel connector having an approximate Y-shape, in accordance with an embodiment of the present specification; 
         FIG.  113 E  is an internal, cross-sectional view of a second section of a service channel connector having an approximate Y-shape, in accordance with an embodiment of the present specification; 
         FIG.  113 F  illustrates another internal, cross-sectional view of a first section of a service channel connector showing edges that are welded, in accordance with an embodiment of the present specification; and 
         FIG.  113 G  illustrates another internal, cross-sectional view of a second section of a service channel connector showing edges that are welded, in accordance with an embodiment of the present specification. 
     
    
    
     DETAILED DESCRIPTION 
     An aspect of some embodiments relates to an endoscope having a tip section equipped with two or more viewing elements. According to one embodiment, one of the viewing elements is positioned at a distal end of the tip section and points forward, and the remaining viewing elements(s) is positioned further back in the tip section, and points sideways. 
     According to another embodiment, one of the viewing elements is positioned at a distal (front) end surface of the tip section and points forward, and the remaining viewing elements(s) is positioned further back in the tip section, and points sideways. 
     According to another embodiment, two or more viewing elements (for example, three, four or more) are positioned in proximity to or at the distal end of the tip section and point sideways such that the field of view provided by the viewing elements covers a front and side views. Even though in such configuration, according to some embodiments, no viewing element is positioned at the distal (front) end surface of the tip section (or in other words, no viewing element is pointing directly forward), still the field of view of the side cameras allows view of the front direction of the tip and accordingly of the endoscope. 
     This configuration, advantageously, may allow for a higher rate of detection, compared to conventional configurations, of pathological objects that exist in the body cavity in which the endoscope operates. 
     Another aspect of some embodiments relates to an endoscope having a tip section equipped with one or more front working/service channels. According to still further aspects of some embodiments, an endoscope tip section comprises one or more side working/service channels. Endoscopic tip configurations having more than one front and/or side working/service channels may significantly improve the performance of the endoscope and allow the endoscope operator to perform more complex medical procedures using multiple medical tools simultaneously. Such configurations may also provide the endoscope operator better access to the object of interest and greater flexibility with operating the medical tools, while at the same time viewing the procedure by a plurality of front and side pointing viewing elements. 
     Still further aspects of some embodiments relate to an endoscope having a tip section equipped with a plurality of advantageous configurations of an electronic circuit board assembly. These configurations consume less space and leave more volume for additional necessary features. 
     Yet another aspect of some embodiments relates to an endoscope having a tip section comprising a plurality of side jets, in addition to a front jet, to enable improved flushing performance of the endoscope. 
     The viewing elements and optionally other elements that exist in the tip section (such as a plurality of illuminators or light sources, one or more front and/or side working/service channels, one or more front and side jet channels, a side fluid injector, an electronic circuit board assembly and/or the like) are uniquely scaled, configured and packaged so that they fit within the minimalistic space available inside the tip section, while still providing valuable results. 
     The present specification is directed towards multiple embodiments. The following disclosure is provided in order to enable a person having ordinary skill in the art to practice the invention. Language used in this specification should not be interpreted as a general disavowal of any one specific embodiment or used to limit the claims beyond the meaning of the terms used therein. The general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention. Also, the terminology and phraseology used is for the purpose of describing exemplary embodiments and should not be considered limiting. Thus, the present invention is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For purpose of clarity, details relating to technical material that is known in the technical fields related to the invention have not been described in detail so as not to unnecessarily obscure the present invention. In the description and claims of the application, each of the words “comprise” “include” and “have”, and forms thereof, are not necessarily limited to members in a list with which the words may be associated. 
     As used herein, the indefinite articles “a” and “an” mean “at least one” or “one or more” unless the context clearly dictates otherwise. 
     Embodiments of methods and/or devices of the specification may involve performing or completing selected tasks manually, automatically, or a combination thereof. Some embodiments of the specification are implemented with the use of components that comprise hardware, software, firmware or combinations thereof. In some embodiments, some components are general-purpose components such as general purpose computers or oscilloscopes. In some embodiments, some components are dedicated or custom components such as circuits, integrated circuits or software. 
     For example, in some embodiments, some of an embodiment is implemented as a plurality of software instructions executed by a data processor, for example, which is part of a general-purpose or custom computer. In some embodiments, the data processor or computer comprises volatile memory for storing instructions and/or data and/or a non-volatile storage, for example, a magnetic hard-disk and/or removable media, for storing instructions and/or data. In some embodiments, implementation includes a network connection. In some embodiments, implementation includes a user interface, generally comprising one or more input devices (e.g., allowing input of commands and/or parameters) and output devices (e.g., allowing reporting parameters of operation and results). 
     It is appreciated that certain features of the specification, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the specification, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable subcombination or as suitable in any other described embodiment of the specification. Certain features described in the context of various embodiments are not to be considered essential features of those embodiments, unless the embodiment is inoperative without those elements. 
     It is noted that the term “endoscope” as mentioned to herein may refer particularly to a colonoscope, according to some embodiments, but is not limited only to colonoscopes. The term “endoscope” may refer to any instrument used to examine the interior of a hollow organ or cavity of the body. 
     It should also be noted that a plurality of terms, as follows, appearing in this specification are used interchangeably to apply or refer to similar components:
         Utility tube/cable is also umbilical tube/cable   Main control unit is also controller unit, main controller or fuse box.   Viewing element is also image capturing device, viewing components, camera, TV camera or video camera.   Working channel is also service channel.   Illuminator is also LED, illumination source.   Flexible shaft is also bending section or vertebra mechanism.       

     Endoscopes that are currently being used typically have a front and side viewing elements for viewing the internal organs, illuminators, a fluid injector for cleaning the lens of the viewing elements, and sometimes also illuminators and a working channel for insertion of surgical tools. The illuminators commonly used are fiber optics that transmit light, generated remotely, to the endoscope tip section. The use of light-emitting diodes (LEDs) for illumination is also known. 
     A tip section of the endoscope assembly may be inserted into a patient&#39;s body through a natural body orifice, such as the mouth, nose, urethra, vagina, or anus. 
     In accordance with an embodiment of the present specification, a tip cover may house the tip section. The tip section, with the tip cover, may be turned or maneuvered by way of a flexible shaft, which may also be referred to as a bending section, for example, a vertebra mechanism. Tip cover may be configured to fit over the inner parts of the tip section, including an electronic circuit board assembly and a fluid channeling component, and to provide protection to the internal components in the inner parts, such as a body cavity. The endoscope can then perform diagnostic or surgical procedures inside the body cavity. The tip section carries one or more viewing elements, such as cameras, to view areas inside body cavities that are the target of these procedures. 
     Tip cover may include panels having optical assemblies of viewing elements. The panels and viewing elements may be located at the front and sides of the tip section. Optical assemblies may include a plurality of lenses, static or movable, providing different fields of view. 
     An electronic circuit board assembly may be configured to carry the viewing elements, which may view through openings on the panels. Viewing elements may include an image sensor, such as but not limited to a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. 
     The electronic circuit board assembly may be configured to carry illuminators that are able to provide illumination through illuminator optical windows. The illuminators may be associated with viewing elements, and may be positioned to illuminate the viewing elements&#39; fields of view. 
     One or more illuminators may illuminate the viewing fields of the viewing elements. In an embodiment, the illuminators may be fiber optic illuminators that carry light from remote sources. The optical fibers are light carriers that carry light from a remotely located light source to the illuminators. The optical fibers extend along an insertion tube between the tip section at a distal end of the endoscope, and a handle at a proximal end. An umbilical/utility tube connects the handle to a main control unit. The main control unit enables control of several functions of the endoscope assembly, including power delivered and communication of signals between the endoscope and its display, among others. 
     Reference is now made to  FIG.  1 A , which shows a multi-viewing elements endoscopy system  100 . System  100  may include a multi-viewing elements endoscope  102 . Multi-viewing elements endoscope  102  may include a handle  104 , from which an elongated shaft  106  emerges. Elongated shaft  106  terminates with a tip section  108  which is turnable by way of a bending section  110 . Handle  104  may be used for maneuvering elongated shaft  106  within a body cavity. The handle may include one or more buttons and/or knobs and/or switches  105  which control bending section  110  as well as functions such as fluid injection and suction. Handle  104  may further include at least one, and in some embodiments, one or more working channel openings  112  through which surgical tools may be inserted as well as one and more side service channel openings. 
     A utility cable  114 , also referred to as an umbilical tube, may connect between handle  104  and a Main Control Unit  199 . Utility cable  114  may include therein one or more fluid channels and one or more electrical channels. The electrical channel(s) may include at least one data cable for receiving video signals from the front and side-pointing viewing elements, as well as at least one power cable for providing electrical power to the viewing elements and to the discrete illuminators. 
     The main control unit  199  contains the controls required for displaying the images of internal organs captured by the endoscope  102 . The main control unit  199  may govern power transmission to the endoscope&#39;s  102  tip section  108 , such as for the tip section&#39;s viewing elements and illuminators. The main control unit  199  may further control one or more fluid, liquid and/or suction pump(s) which supply corresponding functionalities to the endoscope  102 . One or more input devices  118 , such as a keyboard, a touch screen and the like may be connected to the main control unit  199  for the purpose of human interaction with the main control unit  199 . In the embodiment shown in  FIG.  1 A , the main control unit  199  comprises a screen/display  120  for displaying operation information concerning an endoscopy procedure when the endoscope  102  is in use. The screen  120  may be configured to display images and/or video streams received from the viewing elements of the multi-viewing element endoscope  102 . The screen  120  may further be operative to display a user interface for allowing a human operator to set various features of the endoscopy system. 
     Optionally, the video streams received from the different viewing elements of the multi-viewing element endoscope  102  may be displayed separately on at least one monitor (not seen) by uploading information from the main control unit  199 , either side-by-side or interchangeably (namely, the operator may switch between views from the different viewing elements manually). Alternatively, these video streams may be processed by the main control unit  116  to combine them into a single, panoramic video frame, based on an overlap between fields of view of the viewing elements. In an embodiment, two or more displays may be connected to the main control unit  199 , each for displaying a video stream from a different viewing element of the multi-viewing element endoscope  102 . The main control unit  199  is described in U.S. Provisional Patent Application No. 61/817,237, entitled “Method and System for Video Processing in a Multi-Viewing Element Endoscope” and filed on Apr. 29, 2013, which is herein incorporated by reference in its entirety. 
       FIG.  1 B  shows a perspective view of one embodiment of a control panel of a main control unit of a multi-camera endoscopy system. As shown in  FIG.  1 B , the control panel  101  contains a main connector housing  103  having a front panel  107 . The main connector housing front panel  107  comprises a first section  111 , containing a light guide opening  113  and a gas channel opening  115 , and a second section  117 , comprising a utility cable opening  119 . The light guide opening  113  and gas channel opening  115  are configured to receive and connect with a light guide and a gas channel respectively, on a main connector and the utility cable opening  119  is configured to receive and connect with an electric connector of a scope. A switch  121  is used to switch on and switch off the main control unit. 
       FIGS.  1 C through  1 F  show multiple exemplary configurations  123 ,  125 ,  127  and  129  of the tip section  108 . 
     In configuration  123 , a front-pointing camera  131  and a side-pointing camera  133  are essentially perpendicular to one another, and have, correspondingly, perpendicular fields of view. 
     In configuration  125 , a front-pointing camera  137  is essentially perpendicular to a first side-pointing camera  139  and a second side-pointing camera  141 . First and second side-pointing cameras  139 ,  141  are pointing perpendicularly to one another, and are positioned essentially 90 degrees apart in the cylindrical surface of the tip section. In another configuration (not shown), first and second side-pointing cameras may be positioned more than 90 degrees apart in the cylindrical surface of the tip section, such as 120-150 degrees apart or 150-180 degrees apart. For example, the first and second side-pointing cameras may be positioned 180 degrees apart, in opposite sides of the cylindrical surface of the tip section, so that they point in opposite directions. In yet further configurations (not shown), three or more side-pointing cameras may be positioned in the cylindrical surface of the tip section, for example, three cameras having 120 degrees in between them. 
     In configuration  127 , a side-pointing camera  143  is pointing slightly backwards, so that it forms an angle larger than 90 degrees relative to a front-pointing camera  145 . As an example, an angle of 120 degrees is shown. In another configuration (not shown), the angle ranges from 100-145 degrees. 
     In configuration  129 , two opposing side cameras,  147  and  149 , are shown, which are pointing slightly backwards, so that they each form an angle larger than 90 degrees relative to a front-pointing camera  151 . As an example, an angle of 120 degrees is shown. In another configuration (not shown), the angle is 100-145 degrees. 
     Similarly, in other configurations (not shown), three or more side-pointing cameras may be positioned in the cylindrical surface of the tip section, each pointing slightly backwards and having a certain angle in between; in the case of three cameras, they may have an angle of 120 degrees in between them. 
     Reference is now made to  FIG.  1 G , which shows a perspective view of a multi-camera endoscope  153 , according to some embodiments. Endoscope  153  includes an elongated shaft  155  which typically includes a bending section (not shown) and a tip section  157  which terminates the endoscope. Tip section  157  includes three side-pointing cameras: a first side-pointing camera  158 A, a second side-pointing camera, and a third side-pointing camera. The first side-pointing camera  158 A has an associated first field of view  159 A, while the second side-pointing camera has an associated second field of view  159 B, and the third side-pointing camera has an associated third field of view  159 C. Discrete side illuminators (for example LEDs), may be associated with the side-pointing cameras for illuminating their respective fields of view  159 A,  159 B, and  159 C. Tip section  157  further includes a working channel  161  which may be a hollow opening configured for insertion of a surgical tool to operate on various tissues. For example, miniature forceps may be inserted through working channel  161  in order to remove a polyp or sample of which for biopsy. 
     Tip  157  may further include other elements/components, (for example, as described herein according to various embodiments) such as fluid injector(s) for cleaning the cameras and/or their illuminators and pathway fluid injector(s) for inflating and/or cleaning the body cavity into which endoscope  153  is inserted. 
     Reference is now made to  FIG.  1 H , which shows a perspective view of a multi-camera endoscope  153 , according to other embodiments. The endoscope shown in  FIG.  1 H , is similar to that shown in  FIG.  1 G , however, it does not include a working channel. Elongated shaft  155 , tip section  157 , first side-pointing camera  158 A, second side-pointing camera and third side-pointing camera, and their respective fields of view  159 A,  159 B, and  159 C are similar to those described above with reference to  FIG.  1 G . 
     Reference is now made to  FIG.  1 I , which shows a cross-sectional view of a tip section  163  of a multi-camera endoscope, according to an embodiment. Tip section  163  may include a front-pointing image sensor  169 , such as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. Front-pointing image sensor  169  may be mounted on an integrated circuit board  179 , which may be rigid or flexible. Integrated circuit board  179  may supply front-pointing image sensor  169  with necessary electrical power and may derive still images and/or video feeds captured by the image sensor. Integrated circuit board  179  may be connected to a set of electrical cables (not shown) which may be threaded through an electrical channel running through the elongated shaft of the endoscope. Front-pointing image sensor  169  may have a lens assembly  181  mounted on top of it and providing the necessary optics for receiving images. Lens assembly  181  may include a plurality of lenses, static or movable, which may provide a field of view of at least 90 degrees and up to essentially 180 degrees. Lens assembly  181  may provide a focal length of about 3 to 100 millimeters. Front-pointing image sensor  169  and lens assembly  181 , with or without integrated circuit board  179 , may be jointly referred to as a “front pointing camera”. 
     One or more discrete front illuminators  183  may be placed next to lens assembly  181 , for illuminating its field of view. Optionally, discrete front illuminators  183  may be attached to the same integrated circuit board  179  on which front-pointing image sensor  169  is mounted (this configuration is not shown). 
     Tip section  163  may include a side-pointing image sensor  185 , such as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. Side-pointing image sensor  185  may be mounted on an integrated circuit board  187 , which may be rigid or flexible. Integrated circuit board  187  may supply side-pointing image sensor  185  with necessary electrical power and may derive still images and/or video feeds captured by the image sensor. Integrated circuit board  187  may be connected to a set of electrical cables (not shown) which may be threaded through an electrical channel running through the elongated shaft of the endoscope. 
     Side-pointing image sensor  185  may have a lens assembly  168  mounted on top of it and providing the necessary optics for receiving images. Lens assembly  168  may include a plurality of lenses, static or movable, which may provide a field of view of at least 90 degrees and up to essentially 180 degrees. Lens assembly  168  may provide a focal length of about 2 to 33 millimeters. Side-pointing image sensor  185  and lens assembly  168 , with or without integrated circuit board  187 , may be jointly referred to as a “side pointing camera”. 
     One or more discrete side illuminators  176  may be placed next to lens assembly  168 , for illuminating its field of view. Optionally, discrete side illuminators  176  may be attached to the same integrated circuit board  187  on which side-pointing image sensor  185  is mounted (this configuration is not shown). 
     In another configuration (not shown), integrated circuit boards  179  and  187  may be a single integrated circuit board on which both front and side-pointing image sensors  169  and  185 , respectively, are mounted. For this purpose, the integrated circuit board may be essentially L-shaped. 
     Front and side-pointing image sensors  169  and  185  may be similar or identical in terms of, for example, field of view, resolution, light sensitivity, pixel size, focal length, focal distance and/or the like. 
     Optionally, side-pointing image sensor  185  and lens assembly  168  are advantageously positioned relatively close to the distal end surface of tip section  163 . For example, a center of the side-pointing camera (which is the center axis of side-pointing image sensor  185  and lens assembly  168 ) is positioned approximately 7 to 11 millimeters from the distal end of the tip section. This is enabled by an advantageous miniaturizing of the front and side-pointing cameras, which allows for enough internal space in the tip section for angular positioning of the cameras without colliding. 
     Reference is now made to  FIG.  1 J , which shows a cross-sectional view of a tip section  162  of a multi-camera endoscope, according to another embodiment of the specification. Tip section  162 , similar to tip section  163  of  FIG.  1 I , may include a front-pointing image sensor  169 , such as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. Front-pointing image sensor  169  may be mounted on an integrated circuit board  179 , which may be rigid or flexible. Integrated circuit board  179  may supply front-pointing image sensor  169  with necessary electrical power and may derive still images and/or video feeds captured by the image sensor. Integrated circuit board  179  may be connected to a set of electrical cables (not shown) which may be threaded through an electrical channel running through the elongated shaft of the endoscope. Front-pointing image sensor  169  may have a lens assembly  181  mounted on top of it and providing the necessary optics for receiving images. Lens assembly  181  may include a plurality of lenses, static or movable, which may provide a field of view of at least 90 degrees and up to essentially 180 degrees. Lens assembly  181  may provide a focal length of about 3 to 100 millimeters. Front-pointing image sensor  169  and lens assembly  181 , with or without integrated circuit board  179 , may be jointly referred to as a “front pointing camera”. One or more discrete front illuminators  183  may be placed next to lens assembly  181 , for illuminating its field of view. Optionally, discrete front illuminators  183  may be attached to the same integrated circuit board  179  on which front-pointing image sensor  169  is mounted (this configuration is not shown). 
     Tip section  162  may include, in addition to side-pointing image sensor  185 , another side-pointing image sensor  164 . Side-pointing image sensors  185  and  164  may include a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. Side-pointing image sensors  185  and  164  may be mounted on integrated circuit boards  187  and  166 , respectively, which may be rigid or flexible. Integrated circuit boards  187  and  166  may supply side-pointing image sensors  185  and  164  with necessary electrical power and may derive still images and/or video feeds captured by the image sensor. Integrated circuit boards  187  and  166  may be connected to a set of electrical cables (not shown) which may be threaded through an electrical channel running through the elongated shaft of the endoscope. 
     Side-pointing image sensors  185  and  164  may have lens assemblies  168  and  174 , respectively, mounted on top of them and providing the necessary optics for receiving images. Lens assemblies  168  and  174  may include a plurality of lenses, static or movable, which may provide a field of view of at least 90 degrees and up to essentially 180 degrees. Lens assemblies  168  and  174  may provide a focal length of about 2 to 33 millimeters. Side-pointing image sensors  185  and  164  and lens assemblies  168  and  174 , with or without integrated circuit boards  187  and  166 , respectively, may be jointly referred to as a “side pointing cameras”. 
     Discrete side illuminators  176  and  189  may be placed next to lens assemblies  168  and  174 , respectively, for illuminating its field of view. Optionally, discrete side illuminators  176  and  189  may be attached to the same integrated circuit boards  187  and  166  on which side-pointing image sensors  185  and  164  are mounted (this configuration is not shown). 
     In another configuration (not shown), integrated circuit boards  179 ,  187 , and  166  may be a single integrated circuit board on which front and side-pointing image sensors  169 ,  185 , and  164 , respectively, are mounted. 
     Front and side-pointing image sensors  169 ,  185 , and  164  may be similar, identical or distinct in terms of, for example, field of view, resolution, light sensitivity, pixel size, focal length, focal distance and/or the like. 
     Optionally, side-pointing image sensors  185  and  164  and lens assemblies  168  and  174  are advantageously positioned relatively close to the distal end surface of tip section  162 . For example, a center of the side-pointing cameras (which is the center axis of side-pointing image sensors  185  and  164  and lens assemblies  168  and  174 ) is positioned approximately 7 to 11 millimeters from the distal end of the tip section. This is enabled by an advantageous miniaturizing of the front and side-pointing cameras, which allows for enough internal space in the tip section for angular positioning of the cameras without colliding. 
     According to some embodiments, the front and side-pointing cameras are all positioned on the same (imaginary) plain which “divides” tip section  162  into two equal parts along its length. According to some embodiments, each of the side-pointing cameras is perpendicular to the front pointing camera. 
     In accordance with an aspect of the present specification, the fields of view of the front and side-pointing viewing elements overlap. These fields of view are configured to maximize the area of overlap (and minimize a dead space which may be defined as an area that is not covered by the overlap) and bring the point of intersection of the fields of view as close as possible to the endoscope tip. 
     In one embodiment, the area of overlap, or intersecting field of view, occurs over a depth of field range of between 3 mm and 100 mm for the forward looking viewing element and over a depth of field range of between 3 mm and 100 mm for the first side viewing element. In another embodiment, the area of overlap, or intersecting field of view, occurs over a depth of field range of between the minimum and maximum depth of field for the forward looking viewing element and over a depth of field range of between the minimum and maximum depth of field for the first side viewing element. 
     In another embodiment, the area of overlap, or intersecting field of view, occurs over a depth of field range of between 3 mm and 100 mm for the forward looking viewing element and over a depth of field range of between 3 mm and 100 mm for each of the two side viewing elements. In another embodiment, the area of overlap, or intersecting field of view, occurs over a depth of field range of between the minimum and maximum depth of field for the forward looking viewing element and over a depth of field range of between the minimum and maximum depth of field for each of the side viewing elements. 
     In an embodiment, each of the forward looking and side looking viewing elements generates a view ranging from 120 to 180 degrees, as measured from the planar surface defined by the forward looking viewing element surface and the planar surface defined by the side viewing element surface, respectively. In an embodiment, these angle ranges of the forward looking and side viewing elements overlap. 
     In an embodiment, the field of view of the first viewing element intersects with the field of view of the second and/or third viewing elements within a distance of 15 mm from the endoscope tip, first viewing element, second viewing element, or third viewing element. Preferably the distance is less than 15 mm, such as, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, or 2 mm. 
       FIGS.  2 A and  2 B  show exploded views of a tip section  200  of a multi-viewing element endoscope assembly  100  comprising one and two front working/service channels, respectively, according to various embodiments. An aspect of some embodiments also relates to endoscope assembly  100  having the tip section  200  equipped with one or more side working/service channels. 
     Persons of ordinary skill in the art would appreciate that available space in the tip section may impose a constraint on the total number and/or the relative orientations of image capturing devices that may be packaged within the tip section. Further, each viewing element, and related supporting electronic circuitry, dissipates some power in the form of heat. Thus, an acceptable working temperature of the tip section and an allowed heat dissipation rate from the tip section to the patient&#39;s body impose yet another restriction on the total number of operative viewing elements therein. Further yet, each viewing element outputs image data through an imaging channel, generally employed by a dedicated video cable. Moreover, each viewing element may require, for proper operation, dedicated control signals also delivered by wires along the endoscope. Thus, the number of viewing elements may also be limited by the amount of wiring that can be included within the endoscope. Further yet, electronic interference between wires and cables may generally increase with the number of such wires along the endoscope, adversely affecting the quality and integrity of the signals. 
     The aforementioned constraints or limitations, among others, are addressed in various embodiments of the tip section of the endoscope assembly of the present specification. Accordingly, in an embodiment, tip section  200  of the endoscope  100  of  FIGS.  2 A and  2 B  may include a tip cover  300 , an electronic circuit board assembly  400  and a fluid channeling component  600 . 
     According to some embodiments, fluid channeling component  600  may be configured as a separate component from electronic circuit board assembly  400 . This configuration may be adapted to separate the fluid channels, at least one side service channel, such as side service channel  650 , and at least one front working/service channel, such as working/service channel  640 , which are located in fluid channeling component  600 , from the sensitive electronic and optical parts which may be located in the area of electronic circuit board assembly  400 . Thus, the component structure of the tip section  200  enables effective insulation of the plurality of electronic elements from the plurality of fluid channels. 
     According to some embodiments, the use of metal for the construction of a flexible electronic circuit board holder is important for electric conductivity and heat transfer purposes. The flexible electronic circuit board holder, according to embodiments of the specification (such as flexible electronic circuit board holder  500  of  FIG.  19   ), can be used as a heat sink for some or all of the electronic components located at the tip section, particularly illuminators (such as side or front LEDs) and reduce overall temperature of the endoscope tip. This may solve or at least mitigate a major problem of raised temperatures of the endoscope tip and/or any of its components, particularly when using LED illuminators. 
     According to some embodiments, the viewing elements and optionally other elements that exist in the tip section (such as a plurality of illuminators or light sources, one or more front and/or side working/service channels, one or more front and side jet channels, a side fluid injector, an electronic circuit board assembly and/or the like) are uniquely modularized into a three part component structure comprising the tip cover  300 , electronic circuit board assembly  400  and fluid channeling component  600  and packaged so that they fit within the minimalistic space available inside the tip section, while still providing valuable results. 
     Referring to  FIG.  2 A , according to some embodiments, the tip section  200  includes a front panel  320  which comprises four quadrants defined by a vertical axis passing through a center of the front panel  320  and a horizontal axis passing through the center, wherein the four quadrants include a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant. 
     In various embodiments, a front optical assembly  256  is positioned on the front panel  320 . In various embodiments, a first front optical window  242   b , for a first front illuminator  240   b , is positioned on the front panel  320 , at least partially within the bottom right quadrant and at least partially within the bottom left quadrant. In various embodiments, a second front optical window  242   a , for a second front illuminator  240   a , is positioned on the front panel  320 , at least partially within the bottom left quadrant. In various embodiments, a third front optical window  242   c , for a third front illuminator  240   c , is positioned on the front panel  320 , at least partially within the bottom right quadrant. 
     In various embodiments, a front working channel opening  340 , for working channel  640 , is positioned on the front panel  320 , along the vertical axis and at least partially within the top left quadrant and partially within the top right quadrant. In various embodiments, a fluid injector opening  346 , for a fluid injector channel  646 , is positioned on the front panel  320 , at least partially within the top right quadrant. In various embodiments, a jet channel opening  344 , for a jet channel  644 , is positioned on the front panel  320 , at least partially within the top left quadrant. 
     Reference is now made to  FIG.  2 A  along with  FIGS.  3 A and  3 B , which show a perspective view of a fluid channeling component  600  of an endoscope assembly according to an embodiment. According to some embodiments, fluid channeling component  600  may include a proximal fluid channeling section  602  (or base) which may have an essentially cylindrical shape and a unitary distal channeling section  604  (or elongated housing). Distal fluid channeling section  604  may partially continue the cylindrical shape of proximal fluid channeling section  602  and may have a shape of a partial cylinder (optionally elongated partial cylinder). Distal fluid channeling section  604  may have only a fraction of the cylinder (along the height or length axis of the cylinder), wherein another fraction of the cylinder (along the height or length axis of the cylinder) is missing. In other words, in various embodiments, proximal fluid channeling section  602  has a greater width than distal fluid channeling section  604 . Distal fluid channeling section  604  may be integrally formed as a unitary block with proximal fluid channeling section  602 . The height or length of distal fluid channeling section  604  may by higher or longer than the height or length of proximal fluid channeling section  602 . In the embodiment comprising distal fluid channeling section  604 , the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) may provide a space to accommodate electronic circuit board assembly  400  ( FIG.  2 A ). 
     Distal fluid channeling section  604  may include a working channel  640 , which may be configured for insertion of a surgical tool, for example, to remove, treat and/or extract a sample of the object of interest found in the colon or its entirety for biopsy. 
     Distal fluid channeling section  604  may further include a jet fluid channel  644  which may be configured for providing a high pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity (such as the colon) and optionally for suction. Distal fluid channeling section  604  may further include injector channel  646 , which may be used for injecting fluid (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  256  ( FIG.  2 A ) of forward-looking viewing element  116  ( FIG.  2 A ). Proximal fluid channeling section  602  of fluid channeling component  600  may include a side injector channel  666  which may be connected to side injector opening  266  ( FIG.  2 A ). 
     In one embodiment, fluid channeling component  600  comprises a fluid manifold and may include a side service channel  650  having a side service channel opening  350  ( FIG.  2 A ). Side service channel  650  includes a proximal section  652 , a curve  654  and a distal section  656  and is located within fluid channeling component  600 . 
     Proximal section  652  of side service channel  650  is essentially directed along the long dimension of the endoscope. 
     Curve  654  of side service channel  650  is configured to connect proximal section  652  and distal section  656  and curve (at essentially a right angle or in an obtuse angle) distal section  656  towards the side of fluid channeling component  600 . 
     It is noted that according to some embodiments, a curve, such as curve  654  may be configured to create an acute angle between proximal section  652  and distal section  656 . 
     Side service channel  650  may be configured to allow the endoscope operator to insert a surgical tool (not shown) and remove, treat and/or extract a sample of the object of interest or its entirety for biopsy. 
     Advantageously, side service channel  650  may allow greater flexibility to the endoscope operator and allow the insertion of extra surgical tools in addition to the surgical tools which may be inserted through working channel  640 . 
     Reference is now made to  FIG.  2 A  along with  FIGS.  4 A,  4 B, and  4 C , which show a perspective view of a fluid channeling component  700  of an endoscope assembly according to another embodiment. The fluid channeling component  700  comprises a jet fluid channel  744  which may be configured for providing a high pressure jet of fluid such as water or saline for cleaning the walls of the body cavity (such as the colon) and optionally for suction. Component  700  may further include injector channel  746 , which may be used for injecting fluid (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  256  ( FIG.  2 A ) of forward-looking viewing element  116  ( FIG.  2 A ). 
     According to some embodiments, fluid channeling component  700  may include a proximal fluid channeling section  702  (or base) which may have an essentially cylindrical shape and a unitary distal channeling section  704  (or elongated housing). Distal fluid channeling section  704  may partially continue the cylindrical shape of proximal fluid channeling section  702  and may have a shape of a partial cylinder (optionally elongated partial cylinder). Distal fluid channeling section  704  may have only a fraction of the cylinder (along the height or length axis of the cylinder), wherein another fraction of the cylinder (along the height or length axis of the cylinder) is missing. In other words, in various embodiments, proximal fluid channeling section  702  has a greater width than distal fluid channeling section  704 . Distal fluid channeling section  704  may be integrally formed as a unitary block with proximal fluid channeling section  702 . The height or length of distal fluid channeling section  704  may by higher or longer than the height or length of proximal fluid channeling section  702 . In the embodiment comprising distal fluid channeling section  704 , the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) may provide a space to accommodate electronic circuit board assembly  400  ( FIG.  2 A ). 
     According to some embodiments, fluid channeling component  700  comprises a fluid manifold and may include a side service channel  750  having two side service channel openings  758   a  and  758   b . In various embodiments, side service channel openings  758   a  and  758   b  have an angle of exit ranging from 5 to 90 degrees relative to the longitudinal axis of the endoscope. In one embodiment, side service channel openings  758   a  and  758   b  have an angle of exit of 45 degrees relative to the longitudinal axis of the endoscope. 
     Side service channel  750  may be located within fluid channeling component  700  and may include a proximal section  752 , a split  754  and two distal sections  756   a  and  756   b.    
     Proximal section  752  of side service channel  750  may be essentially directed along the long dimension of the endoscope and may be positioned at the bottom and center of the proximal fluid channeling section  702 . 
     Split  754  of side service channel  750  may be configured to split proximal section  752  into two distal sections  756   a  and  756   b  and divert distal sections  756   a  and  756   b  towards two essentially opposite sides of fluid channeling component  700 . 
     In various embodiments, the distal sections  756   a  and  756   b  bend at different angles relative to the long dimension of the endoscope. In one embodiment, the distal sections  756   a  and  756   b  bend at an acute angle relative to the long dimension of the endoscope. In another embodiment, the distal sections  756   a  and  756   b  bend at an angle having a range between 45 to 60 degrees relative to the long dimension of the endoscope. In another embodiment, the distal sections  756   a  and  756   b  bend at an angle of 90 degrees relative to the long dimension of the endoscope. In another embodiment, the distal sections  756   a  and  756   b  bend at an obtuse angle relative to the long dimension of the endoscope. In yet another embodiment, the distal sections  756   a  and  756   b  bend at an angle having a range of 120 to 135 degrees relative to the long dimension of the endoscope. 
     Side service channel  750  may be configured to allow the endoscope operator to insert a surgical tool (not shown) and remove, treat and/or extract a sample of the object of interest or its entirety for biopsy. 
     Advantageously, side service channel  750  may allow greater flexibility to the endoscope operator and allow the insertion of extra surgical tools in addition to the surgical tools, which may be inserted through working channel  740 . 
     While some objects of interest may be visible and/or accessible via the endoscope front panel  320  ( FIG.  2 A ), some objects of interest may be more visible via side looking viewing element  116   b  ( FIG.  2 A ) and/or accessible via endoscope side service channel  750 . Therefore, side service channel  750  may reduce the need to turn the tip section  200  towards the object of interest. Furthermore, side service channel  750  may allow the endoscope operator to access objects of interest, and perform surgical operations while the object of interest is still visible by one of side looking viewing elements  116   b  or  116   c  (on the opposite side of viewing element  116   b  of  FIG.  2 B ). 
     Referring to  FIGS.  3 A,  3 B,  4 A,  4 B and  4 C  in various embodiments, a surgical tool inserted into the side service channel  650  or  750  will exit the endoscope at different angles relative to the long dimension of the endoscope, dependent upon the degree of the bend of the distal sections of said service channel  650  or  750 . In one embodiment, the surgical tool exits the endoscope at an acute angle relative to the long dimension of the endoscope. In another embodiment, the surgical tool exits the endoscope at an angle having a range between 45 to 60 degrees relative to the long dimension of the endoscope. In another embodiment, the surgical tool exits the endoscope at an angle of 90 degrees relative to the long dimension of the endoscope. In another embodiment, the surgical tool exits the endoscope at an obtuse angle relative to the long dimension of the endoscope. In yet another embodiment, the surgical tool exits the endoscope at an angle having a range of 120 to 135 degrees relative to the long dimension of the endoscope. 
     Reference is now made to  FIGS.  5 A and  5 B , which show a perspective view of a fluid channeling component  815  of an endoscope assembly according to another embodiment. 
     According to some embodiments, fluid channeling component  815  may include a proximal fluid channeling section  802  (or base) which may have an essentially cylindrical shape and a unitary distal channeling section  804  (or elongated housing). Distal fluid channeling section  804  may partially continue the cylindrical shape of proximal fluid channeling section  802  and may have a shape of a partial cylinder (optionally elongated partial cylinder). Distal fluid channeling section  804  may have only a fraction of the cylinder (along the height or length axis of the cylinder), wherein another fraction of the cylinder (along the height or length axis of the cylinder) is missing. In other words, in various embodiments, proximal fluid channeling section  802  has a greater width than distal fluid channeling section  804 . Distal fluid channeling section  804  may be integrally formed as a unitary block with proximal fluid channeling section  802 . The height or length of distal fluid channeling section  804  may by higher or longer than the height or length of proximal fluid channeling section  802 . In the embodiment comprising distal fluid channeling section  804 , the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) may provide a space to accommodate electronic circuit board assembly  400  ( FIG.  2 A ). 
     The fluid channeling component  815  comprises two side service channels  810   a ,  810   b  leading to corresponding two side service channel openings  805   a ,  805   b  on either side of a tip section of an endoscope, such as the tip section  200  of  FIG.  61 A . Thus, two independent and distinct side service channels  810   a ,  810   b , one for each side, are located within the fluid channeling component  815 . The side service channels  810   a ,  810   b  comprise proximal sections  812  directed along the long dimension of the endoscope and distal sections  813  that bend towards the respective sides of the fluid channeling component  815 . In various embodiments, the proximal sections  812  of the two side service channels  810   a ,  810   b  extend through a bottom portion of the proximal fluid channeling section  802 . In one embodiment, the distal sections  813  bend at acute angles with reference to the long dimension of the endoscope. In an embodiment, the distal sections  813  bend at a range of 5 degrees to 90 degrees and any increment therein, but preferably 45 degrees relative to the long dimension of the endoscope. 
     According to some embodiments of this specification, there is provided herein an endoscope (such as a colonoscope) that includes (in a tip section thereof), in addition to a front viewing element and one or more side viewing elements, and in addition to a front working/service channel, a second front working/service channel that is configured for insertion of a medical (such as a surgical) tool, optionally in addition to a medical tool inserted from the front working/service channel. 
     Reference is now made to  FIG.  2 B  along with  FIGS.  6 A,  6 B and  6 C  which show perspective views of a fluid channeling component  600  of an endoscope assembly  100  according to another embodiment. 
     According to some embodiments, fluid channeling component  600  may be configured as a separate component from electronic circuit board assembly  400  ( FIG.  2 B ). This configuration may be adapted to separate the fluid channels  640   b  and working channels  640   a , which are located in fluid channeling component  600 , from the sensitive electronic and optical parts which may be located in the area of electronic circuit board assembly  400  ( FIG.  2 B ). 
     According to some embodiments, fluid channeling component  600  may include a proximal fluid channeling section  602  which may have an essentially cylindrical shape, a primary distal channeling section  604   a  and a secondary distal channeling section  604   b . Primary distal fluid channeling section  604   a  and secondary distal channeling section  604   b  may partially continue the cylindrical shape of proximal fluid channeling section  602  and may have a shape of a partial cylinder (optionally elongated partial cylinder). Primary distal fluid channeling section  604   a  and secondary distal channeling section  604   b  may form solely two parallel fractions of the cylinder (along the height axis of the cylinder), wherein the third fraction of the cylinder (along the height axis of the cylinder) is missing. Primary distal fluid channeling section  604   a  and secondary distal channeling section  604   b  may be integrally formed as a unitary block with proximal fluid channeling section  602 . The height of primary distal fluid channeling section  604   a  and secondary distal channeling section  604   b  may by higher than that of proximal fluid channeling section  602 . The primary distal fluid channeling section  604   a  and secondary distal channeling section  604   b  may have the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) and provide a space to accommodate electronic circuit board assembly  400  ( FIG.  2 B ). 
     Proximal fluid channeling section  602  may include integrated screw nuts  606   a  and  606   b , which may be configured for securing tip section  200  ( FIG.  2 B ) to the endoscope shaft (not shown). 
     Primary distal fluid channeling section  604   a  may include working channel  640   a  having a working channel opening  340   a , which may be configured for insertion of a medical (such as a surgical) tool, for example, to remove, treat and/or extract a sample of the object of interest found in the colon or its entirety for biopsy. 
     Working channel  640   a  may be formed as an essentially cylindrical channel located within primary distal channeling section  604   a  along the long dimension of the endoscope and placed in parallel to primary distal fluid channeling section  604   a.    
     Once an object of interest has been detected, the endoscope operator may desire to insert one or more medical tools and remove, treat and/or extract a sample of the polyp or its entirety for biopsy. Therefore, it may be beneficial for the endoscope&#39;s operator to be able to use more than one medical tool. 
     Advantageously, secondary distal channeling section  604   b  may include a second working channels  640   b  having a working channel opening  340   b  which may be similar to working channel  640   a  and may be configured for insertion of a medical tool, for example but not necessarily, in addition to the medical tool which may be inserted through working channel  640   a . The operator may also choose from which working channel he or she would like to insert the medical tool, for example, according to the position of the polyp. 
     Second working channel  640   b  may be formed as an essentially cylindrical channel located within secondary distal channeling section  604   b  along the long dimension of the endoscope and placed in parallel to secondary distal channeling section  604   b . Other configurations may also be possible. First and second working channels may be the same or different in shape and size. 
     Second working channel  640   b  may be configured to improve the performance of the endoscope (particularly, the colonoscope). Current colonoscopes typically have one working channel, which opens at the front distal section of the colonoscope. Such front working channel is adapted for insertion of a surgical tool. The physician is required to perform all necessary medical procedures, such as biopsy, polyp removal and other procedures, via this one channel. 
     A second working channel, such as second working channel  640   b , allows greater flexibility to the endoscope operator and allows the insertion of medical tools in addition to (or instead of) the medical tools which may be inserted through working channel  640   a.    
     This may significantly improve the performance of the endoscope and allow the endoscope operator to perform more complex medical procedures using two medical tools. Second working channel  640   b  provides the endoscope operator better access to the object of interest and greater flexibility with operating the medical tools while at the same time viewing the procedure by the front pointing viewing element  116   a  ( FIG.  2 B ). This substantially increases the performance of the endoscope. Moreover, the two front working channels may be used simultaneously for medical procedures. An example of such a procedure may include surgery that requires stitching which can more easily be performed using two tools from two channels. 
     Another example of simultaneous usage of two working channels may include cleaning of the colon. A common problem exists when physicians find out that the patient&#39;s colon is not sufficiently clean. In such cases, the physician can try to clean the colon part using the “jet” exiting from the front part of the tip and in bad cases the physician is forced to send the patient home and reschedule his/her appointment. According to embodiments of the specification, the two channels can be used simultaneously for cleaning. For example, a cleaning fluid (such as water or water with air) may be inserted through one working channel and suctioned out from a second working channel. This may allow a better cleaning procedure that may solve or mitigate the problem of less efficient colonoscopies due to a non-cleaned colon. 
     In addition, a colonoscopy performed using a colonoscope according to embodiments of the specification may save the need of a cleaning procedure, currently performed by the patient him/herself, prior to colonoscopy. 
     Distal fluid channeling section  604   a  may further include a jet fluid channel  644  which may be configured for providing high pressure jet of fluid such as water or saline for cleaning the walls of the body cavity (such as the colon) and optionally for suction. Distal fluid channeling section  604   a  may further include an injector channel pathway  647  of fluid injector channel  646 , which may be used for blending two fluids (like air and water) and convey the fluid blend into injector channel  646  which may be configured to inject the fluid blend and wash contaminants such as blood, feces and other debris from front optical assembly  256   a  ( FIG.  2 B ) of front-pointing viewing element  116   a  ( FIG.  2 B ). 
     Proximal fluid channeling section  602  of fluid channeling component  600  may include side injector channels  666   a  and  666   b , which may be connected to a first side injector opening  266   a  and a second side injector opening (not visible, but present on the opposite side of opening  266   a  of  FIG.  2 B ) respectively. 
     In accordance with another embodiment, the present specification provides an endoscope with a second front working/service channel in close proximity to a first front working/service channel. In an embodiment, the distance between the two front working/service channels provided ranges from 0.40 mm to 0.45 mm. In an embodiment, the two front working/service channels may be configured for insertion of medical tools allowing simultaneous operation for a specific treatment, such as, treating a tumor or polyp. In another embodiment, one or both of the front working/service channels may be adapted to allow for suction during a procedure. 
       FIG.  7    illustrates a perspective view of a tip section of an endoscope assembly showing a fluid channeling component  645 , in accordance with an embodiment of the present specification. As illustrated, the fluid channeling component  645  comprises a front panel  320  having a jet fluid channel  644 , an injector channel pathway  647 , a first front working/service channel  648  and a second front working/service channel  649 . In one embodiment, the diameter of the first front working/service channel  648  is in a range of 3.6 mm to 4.0 mm and the diameter of the second front working/service channel  649  is in a range of 2.6 mm to 3.0 mm. In an embodiment, the diameters of the first and the second front working/service channels  648 ,  649  are 3.8 mm and 2.8 mm respectively. 
     Similar to  FIG.  2 A , according to some embodiments, the front panel  320  of the fluid channeling component  645  depicted in  FIG.  7    comprises four quadrants defined by a vertical axis passing through a center of the front panel  320  and a horizontal axis passing through the center, wherein the four quadrants include a top left quadrant, a top right quadrant, a bottom left quadrant and a bottom right quadrant. In various embodiments, the first front working/service channel  648  includes an exit port positioned substantially within the top right quadrant of the front panel  320  and the second working/service channel  649  includes an exit port positioned substantially within the top left quadrant of the front panel  320 . 
     Provision of the two front working/service channels may significantly improve the performance of the endoscope and allow the endoscope operator to perform more complex medical procedures using two medical tools. The second working/service channel provides the endoscope operator better access to an object of interest and greater flexibility with operating the medical tools while simultaneously viewing the procedure via the front-pointing viewing element. This substantially increases the performance of the endoscope. Moreover, the two front working/service channels may be used simultaneously for medical procedures. An example of such a procedure includes a surgery that requires stitching which can more easily be performed using two tools from two channels. 
     Another example employing simultaneous usage of two front working/service channels include cleaning of the colon. A common problem exists when physicians find out that the patient&#39;s colon is not sufficiently clean. In such cases, the physician can try to clean the colon part using the “jet” exiting from the front part of the tip. However, for cases in which the colon cannot be cleaned by the front jet, the physician is forced to send the patient home and reschedule his/her appointment. According to embodiments of the present specification, the two channels can be used simultaneously for cleaning. For example, a cleaning fluid (such as water or water with air) may be inserted through one service channel and suctioned out from a second service channel. This may allow a better cleaning procedure that may solve or mitigate the problem of less efficient colonoscopies due to a non-cleaned colon. 
     In addition, a colonoscopy performed using a colonoscope according to embodiments of the present specification may eliminate the need of a cleaning procedure, currently performed by the patient him/herself, prior to colonoscopy. 
     In addition, a gastroscopy performed using a gastroscope according to embodiments of the present specification may eliminate the need of a cleaning procedure, currently performed by the patient him/herself, prior to gastroscopy. 
     In an embodiment, the two front working/service channels are provided in a colonoscope with a front optical assembly and two side optical assemblies. In another embodiment, the two front working/service channels are provided in a gastroscope with a front optical assembly and one side optical assembly. 
     In accordance with some embodiments of the specification, there is provided a tip section of a multi-viewing element endoscope, the tip section comprising: a unitary fluid channeling component adapted to channel fluid for insufflation and/or irrigation (hereinafter abbreviated to ‘I/I’), the unitary fluid channeling component comprising: a proximal opening adapted to receive a fluid tube, the proximal opening being in fluid flow connection with a front fluid channel and a side fluid channel, in accordance with an embodiment. 
       FIG.  8    schematically depicts an isometric proximal view of an inner part of a tip section of an endoscope according to an exemplary embodiment of the current specification, showing the entrances of various channels in the inner part of a tip section. 
     Inner part  890  of a tip section is located within the tip section and may be used for holding in place the components of the endoscope&#39;s tip section such as injectors  364 ,  366   a  and  366   b , viewing elements, lenses and other elements. A cover (not seen in this figure) is placed over inner part  890 . Some elements, for example injectors  364 ,  366   a , and  366   b  (and optionally side viewing element  256   b ) may be assembled after the cover is placed. 
     Inner part  890  of a tip section may comprise of several parts. In the depicted embodiment, inner part  890  of the tip section comprises: unitary fluid channeling component  190 , central section  192  and front section  194  (also seen in  FIGS.  9 A,  9 B  below). Unitary fluid channeling component  190  may be made of a metal or any other material, such as a polymer, a composite material or any other appropriate material or combination of materials. Unitary fluid channeling component  190 , according to some embodiments, may generally include two parts: a proximal fluid channeling component section  190   a  and a distal fluid channeling component section  190   b . Proximal fluid channeling component section  190   a  may have an essentially cylindrical shape. Distal unitary channeling component section  190   b  may partially continue the cylindrical shape of proximal fluid channeling component section  190   a  and may have a shape of a partial cylinder (optionally elongated partial cylinder), having only a fraction of the cylinder (along the height axis of the cylinder), wherein another fraction of the cylinder (along the height axis of the cylinder) is missing. 
     Distal fluid channeling component section  190   b  may be integrally formed as a unitary block with proximal fluid channeling component section  190   a . The height of distal fluid channeling component section  190   b  may be higher than that of proximal fluid channeling component section  190   a . In the embodiment comprising distal fluid channeling component section  190   b , the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) may provide a space to accommodate central section  192 . Central section  192  may include electronics and optical components, such as light means (LEDs for example), viewing elements (CCD or CMOS, for example), lenses, and other elements. This configuration of inner part  890  of the tip section may thus be adapted to separate the fluid channels and working channels, which are located in fluid channeling component  190  from the sensitive electronic and optical parts which are located in central section  192 . 
     On the proximal surface  191  of unitary fluid channeling component  190  is proximal opening  144  of the jet fluid channel leading to a distal opening of the jet channel. Fluid tube (not shown in this figure for simplification purposes) may be inserted into, and affixed to the distal opening of the jet fluid channel. The jet fluid tube is threaded through a flexible shaft and is used for delivering fluid to the body cavity. 
     On the proximal surface  191  of unitary fluid channeling component  190  is proximal opening  165  of a working channel leading to distal opening  340  ( FIG.  9 B ) of the working channel. Working channel tube/tools may be inserted into, and optionally affixed to proximal opening  165  of the working channel. The working channel is threaded through the flexible shaft and is used for delivering surgical tools to the body cavity. The working channel may also be used for suction of fluid from the body cavity. 
     On the proximal surface  191  of unitary fluid channeling component  190  is the electric cable opening  150  for an electrical cable. The electrical cable is connected at its distal end to the electronic components such as cameras and light sources in the endoscope&#39;s tip section. The electrical cable is threaded through the flexible shaft and is used for delivering electrical power and command signals to the tip section and transmitting video signal from the cameras to be displayed to the user. 
     On the proximal surface  191  of unitary fluid channeling component  190  is the I/I tubes proximal opening  891  for gas tube  892  and liquid tube  893  (seen in  FIG.  9 A ). Gas and fluid tubes may be inserted into, and affixed to proximal opening  110  of I/I channels manifold which delivers cleaning fluids to I/I injectors  364 ,  366   a , and  366   b . The gas and liquid tubes (such as gas tube  892  and liquid tube  893 ) may be threaded through the flexible shaft and are used for delivering fluid (gas and/or liquid) to I/I injectors  364 ,  366   a , and  366   b  for cleaning the optical surfaces on the endoscope&#39;s tip section and for inflating a body cavity. The gas and liquid tubes (such as gas tube  892  and liquid tube  893 ) may also be combined into one tube and connected to the tip section as one tube. 
     It should be realized that it is important to keep the dimensions of the tip section of the endoscope small. Within the tight confines of the endoscope&#39;s tip section are the sensors, lenses, electric cables, at least one working channel, and a plurality of fluid channels. In contrast to endoscopes of the art, wherein each of the fluid tubes was directed to its destination, embodiments of the current specification provide I/I channels manifold to supply cleaning liquid and gas to the plurality of I/I injectors. 
     While  FIG.  8    generically depicts the unitary fluid channeling component  190 , and shows its proximal surface  191 , the following figures depict some specific exemplary embodiments of the I/I channels manifolds and main bodies (such as cylinders), according to embodiments within the general scope of the current specification. 
       FIG.  9 A  schematically depicts a partially disassembled tip section  230   a  of an endoscope having I/I channels manifold internal to unitary fluid channeling component  894  according to a first exemplary embodiment of the current specification. 
     Cover  196   a  is designed to fit over inner part (of the tip section)  890   a , and to provide protection to the internal components in the inner part. Holes  164 ′,  340 ′,  344 ′,  242   a ′,  336 ′,  242   b ′,  256   b ′,  252   b ′ and  166   b ′ in cover  196   a  are aligned with the corresponding components and channel openings  164 ,  165 ,  144 ,  242   a ,  336 ,  242   b ,  256   b ,  252   b  and  366   b  in inner part  890   a  respectively. Optional groove  370   b  in cover  196   a  enables cleaning fluid from injector  366   b  to arrive, and clean the front surface  252   b  of side looking viewing element. Not seen in this view are grooves and holes in cover  196   a  which are aligned with the corresponding components and channel openings on the other side of inner part  100   a  respectively. 
     After fitting and attaching cover  196   a  over inner part  890   a , injectors  364 ,  366   b  and  366   a  may be inserted into the corresponding front opening  164 , first side opening  166   b  and opposite side opening respectively, in unitary fluid channeling component  894  through the corresponding front hole  164 ′, first side hole  166   b ′ and opposite side hole respectively, in cover  196   a . Preferably, injectors  364 ,  366   a  and  366   b  may be removed from their corresponding openings for cleaning the endoscope after use. Optionally, injectors  364 ,  366   a  and  366   b  may be replaceable or disposable. Optionally, nozzles, such as nozzle  348  (seen in  FIGS.  2 A and  2 B ) or any other nozzle, may be inserted into the unitary fluid channeling component, such as unitary fluid channeling component  894 , within an isolating (e.g., plastic) part into the opening to allow better electric isolation, particularly when the unitary fluid channeling component and the nozzles are made of metal. 
     In the first exemplary embodiment of the current specification, front opening  164 , first side opening  166   b  and the opening on the opposite side are connected to proximal opening  891  for gas tube  892  and liquid tube  893  via I/I manifold channels which are within unitary fluid channeling component  894 . Distal opening  344 ′ is the opening of a jet fluid channel which may be used for providing a high pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity (such as the colon) and optionally for suction. 
       FIG.  9 B  schematically depicts an isometric cross section of inner part  890   a  having I/I channels manifold internal to unitary fluid channeling component  894  according to a first exemplary embodiment of the current specification. 
     In the depicted embodiment, gas tube  892  and liquid tube  893  are terminated in a plug  109  adapted to fit into proximal opening  891 . It should be noted that although gas tube  892  appears above liquid tube  893 , their order may be reversed, they may be positioned side by side, or replaced with a single tube or the tubes may be joined to one tube before entering inner part  890   a . Alternatively, each of gas tube  892  and liquid tube  893  is separately connected to unitary fluid channeling component  894 , and their lumens open to a common conduit. 
     Proximal opening  891  for gas tube  892  and liquid tube  893  is opened to I/I channel manifold. This cross section shows proximal opening  891  opened to front channel  171  leading to front opening  164  into which front injector  364  is inserted. According to some embodiments, front channel  171  (may also be referred to as front fluid channel) may be drilled in unitary fluid channeling component  894 . It should be noted that unitary fluid channeling component  894  and other parts of inner part  890   a  may be machined or be made by casting, sintering, injection or other manufacturing techniques. 
     Reference is now made to  FIG.  9 C , which schematically depicts an isometric cross section of unitary fluid channeling component  894  having I/I channels manifold internal to it according to a first exemplary embodiment of the current specification and to  FIG.  9 D , which schematically depicts another isometric cross section of inner part  890   a , showing unitary fluid channeling component  894  having I/I channels manifold internal to it according to a first exemplary embodiment of the current specification. 
     Proximal opening  891  for gas tube  892  and liquid tube  893  is seen in this figure opened to I/I channel manifold. This cross section shows proximal opening  891  opened to cross channel  172  (may also be referred to as side fluid channel or side channel) leading to left opening  166   a  into which left injector  366   a  is inserted and to right opening  166   b  into which right injector  366   b  is inserted. 
     According to some embodiments, cross channel  172  may be drilled in unitary fluid channeling component  894 . 
     According to the first exemplary embodiment of the current specification, proximal opening  891  for gas tube  892  and liquid tube  893  is directly opened to I/I channel manifold, within unitary fluid channeling component  894  which comprises: 
     a) a right opening  166   b , connected to proximal opening  891 , and into which right injector  366   b  is inserted;
 
b) a front channel  171  connected to proximal opening  891 , and leading to front opening  164  into which front injector  364  is inserted (as seen in  FIG.  9 B ); and
 
c) a cross channel  172 , connected to the proximal opening  891 , and which is opened to left opening  166   a  into which left injector  366   a  is inserted.
 
       FIG.  10 A  schematically depicts an isometric view of a partially disassembled tip section  230   b  of an endoscope having I/I channels manifold partially internal and partially external to unitary fluid channeling component  894   b  according to a second exemplary embodiment of the current specification. 
     In contrast to the first embodiment depicted in  FIGS.  9 A through  9 D , in the embodiment depicted in  FIGS.  10 A through  10 C , cleaning fluids are supplied to left injector  366   a  via a groove  472  in unitary fluid channeling component  894   b . Groove  472  is connected in one side to proximal opening  891  by hole  474  and is opened to left opening  166   a  which can hardly be seen in this view. 
     Cover  196   b  is designed to fit over inner part  890   b , and to provide protection to the internal components of inner part  890   b . Additionally, cover  196   b  is tightly fitted and preferably hermetically seals groove  472  to convert it to a fluid tight conduit. 
       FIG.  10 B  schematically depicts an isometric view of inner part  890   b  of an endoscope tip section having I/I channels manifold partially internal and partially external to unitary fluid channeling component  894   b  according to a second exemplary embodiment of the current specification. 
       FIG.  10 C  schematically depicts an isometric cross section of unitary fluid channeling component  894   b  according to the second exemplary embodiment of the current specification. 
     According to the second exemplary embodiment of the current specification, proximal opening  891  for gas tube  892  and liquid tube  893  is seen in this figure opened to I/I channel manifold which comprises: 
     a) a right opening  166   b , connected to proximal opening  891 , into which right injector  366   b  is inserted;
 
b) a front channel  171  connected to front opening  164  into which front injector  364  is inserted; and
 
c) hole  474  connected to groove  472  which is opened to left opening  166   a  (seen in  FIG.  10 A ) into which left injector  366   a  (seen in  FIG.  10 A ) is inserted.
 
       FIG.  11 A  schematically depicts an isometric view of a partially disassembled tip section  230   c  of an endoscope having I/I channels manifold partially internal and partially external to unitary fluid channeling component  894   c  according to a third exemplary embodiment of the current specification. 
     In contrast to the first embodiment depicted in  FIGS.  9 A through  9 D , in the embodiment depicted in  FIGS.  11 A through  11 D , fluids (liquid and/or gas) are supplied to left injector  366   b  via a groove  572  in unitary fluid channeling component  894   c . However, in contrast to the second embodiment, depicted in  FIGS.  10 A through  10 C , groove  572  is connected in the right side to right opening  166   b  and opened on the left to left opening  166   a  which can hardly be seen in this view. 
     Cover  196   c  is designed to fit over inner part  890   c , and to provide protection to the internal components of inner part  890   c . Additionally, cover  196   c  is tightly fitted and preferably hermetically seals groove  572  to convert it to a fluid tight conduit. 
       FIG.  11 B  schematically depicts an isometric view of inner part  890   c  of an endoscope tip section having I/I channels manifold partially internal and partially external to unitary fluid channeling component  894   c  according to a third exemplary embodiment of the current specification. 
     It should be noted that the location of groove  572  on surface of unitary fluid channeling component  894   c , and its depth and shape may be different. 
       FIG.  11 C  schematically depicts an isometric cross section of unitary fluid channeling component  894   c  according to the third exemplary embodiment of the current specification. 
     Proximal opening  891  for gas tube  892  and liquid tube  893  is seen in this figure opened to right opening  166   b  and through it to groove  572  leading to left opening  166   a.    
       FIG.  11 D  schematically depicts another isometric cross section of unitary fluid channeling component  894   c  according to the third exemplary embodiment of the current specification. 
     Proximal opening  891  for gas tube  892  and liquid tube  893  is seen in this figure opened to right opening  166   b  and through it to I/I manifold which comprises: 
     a) a right opening  166   b , connected to proximal opening  891 , into which right injector  366   b  is inserted;
 
b) a front channel  171 , connected to proximal opening  891 , and leading to front opening  164  into which front injector  364  is inserted; and
 
c) a groove  572  which receives cleaning fluids from right opening  166   b , and is opened to left opening  166   a  (seen in  FIG.  11 C ) into which left injector  366   a  is inserted.
 
       FIG.  12 A  schematically depicts an isometric cross section view of an assembled tip section  230   d  of an endoscope having I/I channels manifold external to unitary fluid channeling component  894   d  according to a fourth exemplary embodiment of the current specification. 
     Similar to the third embodiment depicted in  FIGS.  11 A through  11 D , groove  672  is connected in the right side to right opening  166   b  and opened on the left to left opening  166   a  (seen in  FIG.  12 C ). 
     However, in contrast to the first, second and third embodiments depicted in  FIGS.  9 A through  9 D ,  FIGS.  10 A through  10 C , and  FIGS.  11 A through  11 D  respectively, in the embodiment depicted in  FIGS.  12 A through  12 C , fluids are supplied to front injector  364  via a front groove  671  in unitary fluid channeling component  894   d . Front groove  671  is opened in its proximal end to groove  672 , and at its distal end to front opening  164 . 
     Cover  196   d  is designed to fit over inner part  890   d , and to provide protection to the internal components of inner part  890   d . Additionally, cover  196   d  is tightly fitted and preferably hermetically seals grooves  671  and  672  to convert them to fluid tight conduits. 
       FIG.  12 B  schematically depicts an isometric view of inner part  890   d  of an endoscope tip section having I/I channels manifold external to unitary fluid channeling component  894   d  according to a fourth exemplary embodiment of the current specification. 
     It should be noted that the location of grooves  671  and  672  on surface of unitary fluid channeling component  894   d , and their depth and shape may be different. For example, the location of any of the grooves may be completely or partially inside the cover, for example, within the walls of the cover. 
       FIG.  12 C  schematically depicts an isometric cross section of unitary fluid channeling component  894   d  according to the fourth exemplary embodiment of the current specification. 
     Proximal opening  891  for gas tube  892  and liquid tube  893  is seen in this figure opened to right opening  166   b  and through it to groove  672  leading to left opening  166   a . Also seen in this figure is the intersection of groove  672  and front groove  671 . 
     According to the fourth embodiment of the current specification, proximal opening  891  for gas tube  892  and liquid tube  893  is opened to right opening  166   b  and through it to an I/I manifold which comprises: 
     a) a right opening  166   b , connected to proximal opening  891 , into which right injector  366   b  is inserted;
 
b) groove  672  which receives I/I fluids from right opening  166   b , and is opened to left opening  166   a  into which left injector  366   a  is inserted; and
 
c) front groove  671 , receiving I/I fluids from groove  672 , and connected to front opening  164  (seen in  FIG.  12 A ) into which front injector  364  (seen in  FIGS.  12 A and  12 B ) is inserted.
 
       FIG.  13 A  schematically depicts an isometric view of an assembled tip section  230   e  of an endoscope having I/I channels manifold partially external to unitary fluid channeling component  894   e  according to a fifth exemplary embodiment of the current specification. 
     For clarity, cover  196   d  was drawn partially transparent to show inner part  890   e.    
     Similar to the second embodiment depicted in  FIGS.  10 A through  10 C , groove  772  is connected to proximal opening  891  (seen in  FIG.  13 D ) by hole  774  and opened on the left to left opening  166   a  (seen in  FIG.  13 C ). 
     Similar to the fourth embodiment depicted in  FIGS.  12 A through  12 C , cleaning fluids are supplied to front injector  364  via a front groove  771  in unitary fluid channeling component  894   e . Front groove  771  is opened in its proximal end to groove  772 , and at its distal end to front opening  164  (seen in  FIG.  13 D ). 
     Cover  196   e  is designed to fit over inner part  890   e , and to provide protection to the internal components of inner part  890   e . Additionally, cover  196   e  is tightly fitted and preferably hermetically seals grooves  771  and  772  to convert them to fluid tight conduits. 
       FIG.  13 B  schematically depicts an isometric view of inner part  890   e  of an endoscope tip section having I/I channels manifold partially external to unitary fluid channeling component  894   e  according to a fifth exemplary embodiment of the current specification. 
     It should be noted that the location of grooves  771  and  772  on surface of unitary fluid channeling component  190   d , and their depth and shape may be different. 
       FIG.  13 C  schematically depicts another isometric view of inner part  890   e  of an endoscope tip section having I/I channels manifold partially external to unitary fluid channeling component  894   e  according to a fifth exemplary embodiment of the current specification. 
     This embodiment depicts groove  772  connection to left opening  166   a  (seen in  FIG.  13 D ). 
       FIG.  13 D  schematically depicts an isometric cross section of endoscope tip section  230   e  according to the fifth exemplary embodiment of the current specification. 
     Proximal opening  891  for gas tube  892  and liquid tube  893  is seen in this figure opened to right opening  166   b . Also seen in this figure is hole  774  connecting proximal opening  891  to front groove  771  and the connection of front groove  771  to front opening  164 . 
     According to the fifth embodiment of the current specification, proximal opening  891  for gas tube  892  and liquid tube  893  is opened to right opening  166   b  and through hole  774  to I/I manifold which comprises: 
     a) a right opening  166   b , connected to proximal opening  891 , into which right injector  366   b  is inserted;
 
b) groove  772  (seen in  FIGS.  13 A through  13 C ) which receives fluids via hole  774  connected to proximal opening  891 , and is opened to left opening  166   a  (seen in  FIG.  13 C ) into which left injector  366   a  (seen in  FIGS.  13 A through  13 C ) is inserted; and
 
c) front groove  771 , receiving I/I fluids from hole  774 , and connected to front opening  164  into which front injector  364   b  is inserted.
 
       FIG.  14 A  schematically depicts an isometric view of an assembled tip section  230   f  of an endoscope having I/I channels manifold external to unitary fluid channeling component  894   f  in inner part  890   f  according to a sixth exemplary embodiment of the current specification. 
     Similar to the fourth embodiment depicted in  FIGS.  12 A through  12 C , groove  872  in unitary fluid channeling component  894   f  is connected in the right side to right opening  166   b  and opened on the left to left opening  166   a.    
     Similar to the fourth embodiment depicted in  FIGS.  12 A through  12 C , front groove  871  is connected in its proximal end to groove  872 . 
     However, in contrast to the fourth embodiment, cleaning fluids are supplied to grooves  871  and  872  via hole  874 , connecting them to proximal opening  891 . 
     Cover  196   f  is designed to fit over inner part  890   f , and to provide protection to the internal components of inner part  890   f . Additionally, cover  196   f  is tightly fitted and preferably hermetically seals grooves  871  and  872  to convert them to fluid tight conduits. 
       FIG.  14 B  schematically depicts an isometric view of a partially disassembled tip section  230   f  of an endoscope having I/I channels manifold external to unitary fluid channeling component  894   f  in inner part  890   f  according to a sixth exemplary embodiment of the current specification. 
     It should be noted that the location of grooves  871  and  872  on surface of unitary fluid channeling component  894   d , and their depth and shape may be different. 
     According to the sixth embodiment of the current specification, proximal opening  891  (seen in  FIG.  14 A ) for gas tube  892  and liquid tube  893  is connected to hole  874  and through it to an I/I manifold which comprises: 
     a) groove  872  which receives cleaning fluids from proximal opening  891  via hole  874  and is connected to right opening  166   b  into which right injector  366   b  is inserted;
 
b) same groove  872  connected to left opening, to which left injector  366   a  is inserted; and
 
c) front groove  871 , receiving I/I fluids from groove  872 , and connected to front opening into which front injector  364  is inserted.
 
     It should be noted that optionally I/I injectors  336   a  and  336   b , and optionally also  364  may be constructed as identical interchangeable inserts. 
     Reference is now made to  FIG.  15 A  which schematically depicts an isometric proximal view of a main section of an inner part of an endoscope tip section, according to an exemplary embodiment of the current specification and to  FIG.  15 B , which schematically depicts an isometric cross section of the main section of  FIG.  15 A , according to an exemplary embodiment of the current specification. 
     Unitary fluid channeling component  990  of an inner part of a tip section of an endoscope (such as a colonoscope) is configured to be located within the tip section and may be used for accommodating fluid channels, working channels and optionally cable channel/recess and for holding in place the components, such as tubing/tubes and injectors. Unitary fluid channeling component  990  may be a part of the inner part of the tip section in a similar manner to that described, for example, in  FIG.  8   . 
     Unitary fluid channeling component  990 , according to some embodiments, may generally include two parts: a proximal fluid channeling component section  990 ′ and a distal fluid channeling component section  990 ″. Proximal fluid channeling component section  990 ′ may have an essentially cylindrical shape. Distal fluid channeling component section  990 ″ may partially continue the cylindrical shape of proximal fluid channeling component section  990 ′ and may have a shape of a partial cylinder (optionally elongated partial cylinder), having only a fraction of the cylinder (along the height axis of the cylinder), wherein another fraction of the cylinder (along the height axis of the cylinder) is missing. Distal fluid channeling component section  990 ″ may be integrally formed as a unitary block with proximal fluid channeling component section  990 ′. The height of distal fluid channeling component section  990 ″ may be higher than that of proximal fluid channeling component section  990 ′. In the embodiment comprising distal fluid channeling component section  990 ″, the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) may provide a space to accommodate a central section (not shown). 
     On proximal surface  991  of fluid channeling component  990  is proximal opening  944  of the jet fluid channel leading to distal opening of a jet channel (not shown). A jet fluid tube may be inserted through a flexible shaft and may be used for delivering fluid to, and optionally suction of fluid from the body cavity, for cleaning purposes. 
     On proximal surface  991  of unitary fluid channeling component  990  is proximal opening  965  of the working channel leading to a distal opening of the working channel (not shown). 
     Unitary fluid channeling component  990  includes groove  950  extending from proximal surface  991  along the length of proximal fluid channeling component section  990 ′. Groove  950  is adapted to guide (and optionally hold in place) an electric cable(s) which may be connected at its distal end to the electronic components such as viewing elements (for example, cameras) and/or light sources in the endoscope&#39;s tip section and deliver electrical power and/or command signals to the tip section and/or transmit video signal from the cameras to be displayed to the user. According to this embodiment, the electrical cable(s) do not have to be threaded through proximal fluid channeling component section  990 ′ (which may be complicated) but can be simply placed in groove  950  and held by it. 
     On proximal surface  991  of unitary fluid channeling component  990  are I/I tubes proximal openings: front proximal opening  910 ; right side proximal opening  911 ; and left side proximal opening  913 . Front proximal opening  910 , right side proximal opening  911  and left side proximal opening  913  lead to front channel  970  (seen in  FIG.  15 B ), right side channel, and left side channel  973 , respectively. Front channel  970  extends from front proximal opening  910 , through proximal fluid channeling component section  990 ′ and distal fluid channeling component section  990 ″ to front opening  960 . Left side channel  973  extends from right proximal opening  913 , through proximal fluid channeling component section  990 ′ to left opening  963 . Right side channel extends from right proximal opening  911 , through proximal fluid channeling component section  990 ′ to right opening, similar to the left side arrangement. 
     Front channel  970  may include two parts: a proximal part  970 ′ (extending through proximal fluid channeling component section  990 ′) and a distal part  970 ″ extending through distal fluid channeling component section  990 ″). Proximal part  970 ′ of front channel  970  is adapted to receive, through front proximal opening  910 , tube  980  (shown in  FIG.  15 C ) which is adapted to transfer fluid (liquid and/or gas) to front channel  970 . Tube  980  may be divided at any point along its length (for example at junction  981 ) into two tubes, one adapted to transfer gas and the other adapted to transfer liquid (such as water). 
     Left side channel  973  may be adapted to receive, at its proximal part, through left side proximal opening  913 , tube  982  (shown in  FIG.  15 C ) which is adapted to transfer fluid (liquid and/or gas) to left side channel  973 . Tube  982  may be divided at any point along its length (for example at junction  983 ) into two tubes, one adapted to transfer gas and the other adapted to transfer liquid (such as water). 
     Right side channel may be adapted to receive, at its proximal part, through right side proximal opening  911 , tube  984  (shown in  FIG.  15 C ) which is adapted to transfer fluid (liquid and/or gas) to right side channel. Tube  984  may be divided at any point along its length (for example at junction  985 ) into two tubes, one adapted to transfer gas and the other adapted to transfer liquid (such as water). 
     The endoscopist can thus decide which fluid (gas, liquid or both) he would like to pass through the I/I channel, which fluid, as mentioned herein, may be used for cleaning and/or insufflation purposes. 
       FIG.  15 C  schematically depicts an isometric proximal view of the main section of  FIG.  15 A , having liquid and gas tubes connected thereto, according to an exemplary embodiment of the current specification. 
     Referring back to  FIG.  2 A , electronic circuit board assembly  400  may be configured to carry a front looking viewing element  116 , a first side looking viewing element and a second side viewing element  116   b  which may be similar to front looking viewing element  116  and may include a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. 
     Electronic circuit board assembly  400  may be configured to carry front illuminators  240   a ,  240   b ,  240   c , which may be associated with front looking viewing element  116  and may be positioned to essentially illuminate the field of view of front looking viewing element  116 . 
     In addition, electronic circuit board assembly  400  may be configured to carry side illuminators  250   a  and  250   b , which may be associated with side looking viewing element  116   b  and may be positioned to essentially illuminate side looking viewing element&#39;s  116   b  field of view. Electronic circuit board assembly  400  may also be configured to carry side illuminators, which may be associated with the opposite side looking viewing element, which may be similar to side illuminators  250   a  and  250   b.    
     Front illuminators  240   a ,  240   b ,  240   c  and side illuminators  250   a  and  250   b  may optionally be discrete illuminators and may include a light-emitting diode (LED), which may be a white light LED, an infrared light LED, a near infrared light LED, an ultraviolet light LED or any other LED. 
     The term “discrete”, concerning discrete illuminator, may refer to an illumination source, which generates light internally, in contrast to a non-discrete illuminator, which may be, for example, a fiber optic merely transmitting light generated remotely. 
     A significant problem exists in the art when attempts are made to pack all necessary components into the small inner volume of the endoscope. This problem dramatically increases when three viewing elements and respective illumination sources (such as LEDs) are packed in the tip of the endoscope. There is thus provided, according to some embodiments of the specification, a flexible electronic circuit for carrying and packing within the limited inner volume of the endoscope&#39;s tip, at least a front viewing element and one or more (for example two) side view viewing elements and their respective illumination sources. 
     According to some embodiments, the flexible circuit board consumes less space and leaves more volume for additional necessary features. The flexibility of the board adds another dimension in space that can be used for components positioning. 
     The use of the circuit board according to embodiments of the specification can significantly increase reliability of the electric modules connection thereto as no wires are for components connectivity. In addition, according to some embodiments, the components assembly can be machined and automatic. 
     The use of the circuit board, according to embodiments of the specification, may also allow components (parts) movement and maneuverability during assembly of the viewing element head (tip of the endoscope) while maintaining a high level of reliability. The use of the circuit board, according to embodiments of the specification, may also simplify the (tip) assembling process. 
     According to some embodiments, the flexible circuit board is connected to the main control unit via multi-wire cable; this cable is welded on the board in a designated location, freeing additional space within the tip assembly and adding flexibility to cable access. Assembling the multi-wire cable directly to the electrical components was a major challenge which is mitigated by the use of the flexible board according to embodiments of the specification. 
       FIG.  16    schematically depicts an isometric view of a folded flexible electronic circuit board carrying a front view camera, two side view cameras, and illumination sources, according to embodiments of the specification. 
     Flexible electronic circuit board  400 , shown here in a folded configuration, is configured to carry: forward looking viewing element  116 ; LEDs  240   a ,  240   b  and  240   c  positioned to essentially illuminate the field of view (FOV) of forward looking viewing element  116 ; side looking viewing element  116   b ; LEDs  250   a  and  250   b  positioned to essentially illuminate the FOV of side looking viewing element  116   b ; side looking viewing element  116   c  and LEDs  250   a ′ and  250   b ′ positioned to essentially illuminate the FOV of side looking viewing element  116   c.    
     As can also be seen in  FIGS.  17  and  18   , which schematically depict isometric views of a folded and flat flexible electronic circuit board, respectively, according to embodiments of the specification, flexible electronic circuit board  400  includes three sections: front section  1702 , main section  1704  and rear section  1706 . 
     Front section  402  of flexible electronic circuit board  1700  includes first front LED surface  1708 , second front LED surface  1710  and a bottom front LED surface  1712 . First front LED surface  1708 , second front LED surface  1710  and a bottom front LED surface  1712  are flat surfaces formed from a unitary piece of a printed circuit board (PCB) layer. First front LED surface  1708  is adapted to carry front LED  240   b , second front LED surface  1710  is adapted to carry front LED  240   a  and a bottom front LED surface  1712  is adapted to carry front LED  240   c . First front LED surface  1708 , second front LED surface  1710  and a bottom front LED surface  1712  have an arcuate shape when viewed as a whole, which is configured to support forward looking viewing element  116 . 
     Front section  1702  of flexible electronic circuit board  400  is connected to main section  1704  through bottom section  1712 . Main section  1704  of flexible electronic circuit board  1700  includes a center portion  1718 , a first foldable side panel  1714  and a second foldable side panel  1716 . When flexible electronic circuit board  400  is in a folded configuration, first foldable side panel  1714  and second foldable side panel  1716  are configured to fold upwards (towards the length axis of the endoscope tip), for example, as shown herein, forming an angle of about 45 degrees with center portion  1718  of main section  1704 . First foldable side panel  1714  also includes an arm section  1720 , extending therefrom, having a front sensor surface  1722  (may also be referred to as a camera surface) adapted to carry forward looking viewing element  116 . When flexible electronic circuit board  400  is in a folded position, arm section  1720  is folded to be essentially perpendicular to center portion  1718  of main section  1704 , and front sensor surface  1722  is folded to be essentially perpendicular to center portion  1718  and to arm section  1720 , such that it faces forwards, essentially at the same direction of first front LED surface  1708 , second front LED surface  1710  and a bottom front LED surface  1712 . This configuration enables forward looking viewing element  116  and LEDs  240   a ,  240   b , and  240   c  to face the same direction. 
     As described hereinabove, main section  1704  is connected to bottom section  1712  of front section  1702 . On the opposing end of main section  1704 , it is connected to rear section  1706 . 
     Rear section  1706  includes a rear central portion  1724 . Rear central portion  1724  is connected to a first rear arm section  1726 , extending from one side of rear central portion  1724  and to a second rear arm section  1728 , extending from the opposing side of rear central portion  1724 . 
     First rear arm section  1726  includes a first side sensor surface  1730  (adapted to carry side looking viewing element  116   b ). Second rear arm section  1728  includes a second side sensor surface  1732  (adapted to carry side looking viewing element  116   c ). 
     First rear arm section  1726  further includes a first side LED surface  1734  and a second side LED surface  1736 , adapted to carry side LEDs  250   a  and  250   b , respectively. Second rear arm section  1728  further includes a third side LED surface  1738  and a fourth side LED surface  1740 , adapted to carry side LEDs  250   a ′ and  250   b ′, respectively. 
     According to some embodiments, front sensor surface  1722  (which is adapted to carry forward looking viewing element  116 ), first side sensor surface  1730  and second side sensor surface  1732  (which are adapted carry side looking viewing elements  116   b  and  116   c  respectively) are thicker than the front and side LED surfaces. For example, the sensor surface thickness is configured for locating the sensor (of the viewing element) such that the welding pins of the sensor wrap the surface and are welded on the opposite side of the sensor in specific welding pads. 
     The sensor surfaces may be rigid and used as a basis for the viewing element assembly. The height of the sensor surface has significant importance allowing the sensor conductors to bend in a way such that they will directly reach the welding pads on the opposite side of the sensor rigid surface. The rigid basis also serves as electrical ground filtering electromagnetic noise to and from the sensor and thus increasing signal integrity. 
     When flexible electronic circuit board  400  is in a folded configuration, rear central portion  1724  is folded upwards, perpendicularly to center portion  1718  of main section  1704 . First side sensor surface  1730  and second side sensor surface  1732  are positioned perpendicularly to center portion  1718  and also perpendicularly to rear central portion  1724 . In addition, first side sensor surface  1730  and second side sensor surface  1732  are positioned essentially parallel and “back to back” to each other such that when they carry side looking viewing element  116   b  and side looking viewing element  116   c , these viewing elements view opposing sides. First side LED surface  1734  and a second side LED surface  1736  are positioned perpendicularly to first side sensor surface  1730  and adapted to carry, on their inner sides, side LEDs  250   a  and  250   b , respectively, such that LEDs  250   a  and  250   b  are positioned in proximity to side looking viewing element  116   b . Third side LED surface  1738  and a fourth side LED surface  1740  are positioned perpendicularly to second side sensor surface  1732  and adapted to carry, on their inner sides, side LEDs  250   a ′ and  250   b ′, respectively, such that LEDs  250   a ′ and  250   b ′ are positioned in proximity to side looking viewing element  116   c.    
     According to some embodiments of the specification, front section  1702 , main section  1704  and rear section  1706  of flexible electronic circuit board  400  are all integrally formed from a unitary piece of circuit board layer. 
     Reference is now made to  FIGS.  19  and  20    which schematically depict isometric views ( FIG.  19    shows an exploded view) of a folded flexible electronic circuit board carrying viewing elements and illumination sources and a flexible electronic circuit board holder, according to an exemplary embodiment of the current specification. 
     Similar to  FIG.  16   , flexible electronic circuit board  400 , shown in  FIG.  19    in its folded configuration, is configured to carry: forward looking viewing element  116 ; LEDs  240   a ,  240   b  and  240   c  positioned to illuminate essentially the FOV of forward looking viewing element  116 ; side looking viewing element  116   b ; LEDs  250   a  and  250   b  positioned to illuminate essentially the FOV of side looking viewing element  116   b ; side looking viewing element  116   c  and LEDs  250   a ′ and  250   b ′ positioned to illuminate essentially the FOV of side looking viewing element  116   c.    
     Flexible electronic circuit board holder  500  is adapted to hold flexible electronic circuit board  400  in its desired folded position, and secure the front and side looking viewing elements and their corresponding illuminators in place. As shown in  FIG.  19   , flexible electronic circuit board holder  500  is a unitary piece of rigid material, such as brass, stainless steel, aluminum or any other material. 
     According to some embodiments, the use of metal for the construction of the flexible electronic circuit board holder is important for electric conductivity and heat transfer purposes. The flexible electronic circuit board holder, according to embodiments of the specification, (such as flexible electronic circuit board holder  500 ) can be used as a heat sink for some or all of the electronic components located at the tip section, particularly illuminators (such as side or front LEDs) and reduce overall temperature of the endoscope tip. This may solve or at least mitigate a major problem of raised temperatures of the endoscope tip and/or any of its components, particularly when using LED illuminators. 
     Flexible electronic circuit board holder  500  includes a back portion  502  adapted to support second side LED surface  1736  and fourth side LED surface  1740 . 
     Flexible electronic circuit board holder  500  further includes front portions  504   a  and  504   b , supporting the back sides (opposing to the sides where the LEDs are attached) of first front LED surface  1708  and second front LED surface  1710 , respectively. 
     Flexible electronic circuit board holder  500  further includes two side portions  506   a  and  506   b  on the two opposing sides of flexible electronic circuit board holder  500 . Each of side portions  506   a  and  506   b  include two small openings for the side LEDs ( 250   a ,  250   b ,  250   a ′,  250   b ′) and one opening for side looking viewing element  116   b  and  116   a . Side portions  506   a  and  506   b  of flexible electronic circuit board holder  500  abut first and second side foldable panels  1716  and  1714 , respectively, of flexible electronic circuit board  400 . 
     Flexible electronic circuit board holder  500  further includes a top part including top portions  508   a  and  508   b  (the top part of the flexible electronic circuit board holder may also include one top portion) covering the top part of flexible electronic circuit board  400  and configured to support fluid channeling component  600  (shown in  FIG.  21   ). 
     Reference is now made to  FIG.  21   , which schematically depicts an isometric view of a folded flexible electronic circuit board carrying cameras and illumination sources, a flexible electronic circuit board holder, and a fluid channeling component, according to an exemplary embodiment of the current specification.  FIG.  20    schematically depicts an isometric view of a folded flexible electronic circuit board carrying cameras and illumination sources and a flexible electronic circuit board holder.  FIG.  21    adds to the configuration of  FIG.  20   , a fluid channeling component  600 , which includes irrigation and insufflation (I/I) channels, jet channel and a working channel. Fluid channeling component  600  is a separate component from flexible electronic circuit board  400 . This configuration is adapted to separate the fluid channels and working channel, which are located in fluid channeling component  600 , from the sensitive electronic and optical parts which are located in the area of flexible electronic circuit board  400 . 
     Fluid channeling component  600  (or according to some embodiments, a unitary fluid channeling component), according to some embodiments, may generally include two parts: a proximal fluid channeling component section  690 ′ and a distal fluid channeling component section  690 ″. Proximal fluid channeling component section  690 ′ may have an essentially cylindrical shape. Distal unitary channeling component section  690 ″ may partially continue the cylindrical shape of proximal fluid channeling component section  690 ′ and may have a shape of a partial cylinder (optionally elongated partial cylinder), having only a fraction of the cylinder (along the height axis of the cylinder), wherein another fraction of the cylinder (along the height axis of the cylinder) is missing. Distal fluid channeling component section  690 ″ may be integrally formed as a unitary block with proximal fluid channeling component section  690 ′. The height of distal fluid channeling component section  690 ″ may be higher than that of proximal fluid channeling component section  690 ′. In the embodiment comprising distal fluid channeling component section  690 ″, the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) may provide a space to accommodate flexible electronic circuit board  400  and flexible electronic circuit board holder  500 . 
     Front face  620  of distal fluid channeling component section  690 ″ includes a distal opening  640  of a working channel (located inside fluid channeling component  690 ). Front face  620  of distal fluid channeling component section  690 ″ further includes distal opening  691  of a jet fluid channel which may be used for providing a high pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity (such as the colon) and optionally for suction. Front face  620  of distal fluid channeling component section  690 ″ further includes irrigation and insufflation (I/I) opening  664  which may be used for injecting fluid (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  256  of forward looking viewing element  116 . 
     Proximal fluid channeling component section  690 ′ of fluid channeling component  600  includes I/I openings aimed at a first side optical assembly  256   b  and at a second, opposite side optical assembly, and used for injecting fluid (the term “fluid” may include gas and/or liquid) to wash contaminants such as blood, feces and other debris from the first side optical assemblies  256   b  and second, opposite side optical assembly of a first side looking viewing element  116   b  and a second, opposite side looking viewing element. According to some embodiments, the injectors may supply liquid for cleaning any of the tip elements (such as any optical assembly, windows, LEDs, and other elements). 
     Reference is now made to  FIG.  22   , which schematically depicts an isometric view of a folded flexible electronic circuit board carrying cameras and illumination sources, a flexible electronic circuit board holder, a fluid channeling component, and a tip cover (in an exploded view), which together form a tip section of an endoscope, according to an exemplary embodiment of the current specification. 
     Fluid channeling component  600 , flexible electronic circuit board  400  and flexible electronic circuit board holder  500  are described in  FIGS.  20  and  21   . Tip cover  2200  is designed to fit over the inner parts of the tip section  2230 , and to provide protection to the internal components in the inner part. 
     Tip cover  2200  includes hole  2236  configured to align with front optical assembly  256  of forward looking viewing element  116 ; optical windows  242   a ,  242   b  and  242   c  of LEDs  240   a ,  240   b  and  240   c  (seen for example in  FIGS.  16  and  19 - 22   ); distal opening  340  of a working channel; distal opening  344  of a jet fluid channel; I/I injector  346  having a nozzle  348  (aligning with I/I opening  664  of fluid channeling component  600 ); a first hole  2256   b  and a second hole on the opposite side configured to align with a first side optical assembly  256   b  and a second, opposite side optical assembly of side looking viewing elements; optical windows  252   a  and  252   b  for LEDs  250   a  and  250   b  for a first side viewing element; and optical windows on the opposite side for LEDs for an opposite side viewing element; a first side hole  2266   b  and a second side hole adapted to align with a first I/I opening  2267   b  and a second, opposite side I/I opening. 
     In another embodiment, the electronic circuit board is configured to be foldable. Advantageously, the configuration of a foldable electronic circuit board enables having a slim and compact design and improves the performance of the endoscope (particularly, the colonoscope) by allowing the incorporation of additional elements into the endoscope tip section, for example, having an endoscope tip section with an additional working channel (as that in  FIG.  2 A ), which may be used for threading a second medical tool. 
     Reference is now made to  FIGS.  23 A,  23 B,  23 C and  23 D , which show exploded views of a foldable electronic circuit board  400  of an endoscope assembly  100  of  FIG.  2 A  according to an embodiment. 
     According to some embodiments, foldable electronic circuit board  400  may have several internal parts including a camera circuit board  440 , a flexible illumination circuit board  420 , a bottom circuit board holder  460  and a front circuit board holder  462 . 
     The internal parts of foldable electronic circuit board  400  may be configured to be assembled, connected or attached together into a condensed structure having a slim and compact design. 
     Additionally, it should be noted that the internal parts of foldable electronic circuit board  400  may be electrically connected and may be configured to share resources as electrical power and electrical signals. 
     Camera circuit board  440  may be configured to carry a front-pointing viewing element  116   a  and two side-pointing viewing elements  116   b ,  116   c  which may be similar to front-pointing viewing element  116   a  and may include a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. 
     According to some embodiments, side-pointing viewing elements  116   b  and  116   c  may be installed such that their field of views are substantially opposing. However, different configurations and number of side-pointing viewing elements are possible within the general scope of the current specification. 
     Flexible illumination circuit board  420 , which may be formed as a flexible unitary piece of a PCB layer, may include two main sections  424   a  and  424   b , a front foldable panel  422   a  and four side foldable panels  422   b ,  422   c ,  422   d ,  422   e.    
     When flexible illumination circuit board  420  is in a folded configuration, front foldable panel  422   a  and four side foldable panels  422   b ,  422   c ,  422   d ,  422   e  may be configured to fold downwards forming a right angle with two main sections  424   a  and  424   b.    
     Front foldable panel  422   a  may be configured to carry front illuminators  240   a ,  240   b , which may be associated with front-pointing viewing element  116   a  and positioned to essentially illuminate front-pointing viewing element&#39;s  116   a  field of view. 
     When front foldable panel  422   a  is in a folded configuration, it may form a right angle with main sections  424   a  and  424   b  such that it faces forward, essentially at the same direction of front-pointing viewing element  116   a  and therefore enables front illuminators  240   a ,  240   b  to face the same direction as front-pointing camera  116   a  and essentially illuminate front-pointing viewing element&#39;s  116   a  field of view. 
     Side foldable panels  422   b ,  422   c  may be configured to carry side illuminators  250   a ,  250   b  respectively, which may be associated with side-pointing viewing element  116   b  and positioned to essentially illuminate side-pointing viewing element&#39;s  116   b  field of view. 
     When side foldable panels  422   b ,  422   c  are in a folded configuration, side foldable panels  422   b ,  422   c  may be configured to form a right angle with main section  424   a  such that it faces sideways, essentially at the same direction of side-pointing viewing element  116   b  and therefore enables side illuminators  250   a ,  250   b  to face the same direction as side-pointing viewing element  116   b  and essentially illuminate side-pointing viewing element&#39;s  116   b  field of view. 
     Side foldable panels  422   d ,  422   e  may be configured to carry side illuminators  260   a ,  260   b  respectively, which may be associated with side-pointing viewing element  116   c  and positioned to essentially illuminate side-pointing viewing element&#39;s  116   c  field of view. 
     When side foldable panels  422   d ,  422   e  are in a folded configuration, side foldable panels  422   d ,  422   e  may be configured to form a right angle with main section  424   b  such that it faces sideways, essentially at the same direction of side-pointing viewing element  116   c  and therefore enables side illuminators  260   a ,  260   b  to face the same direction as side-pointing viewing element  116   c  and essentially illuminate side-pointing viewing element&#39;s  116   c  field of view. 
     Front illuminators  240   a ,  240   b  and side illuminators  250   a ,  250   b ,  260   a  and  260   b  may optionally be discrete illuminators and may include a light-emitting diode (LED), which may be a white light LED, an infrared light LED, a near infrared light LED, an ultraviolet light LED or any other LED. 
     The term “discrete”, concerning discrete illuminator, may refer to an illumination source, which generates light internally, in contrast to a non-discrete illuminator, which may be, for example, a fiber optic merely transmitting light generated remotely. 
     Bottom circuit board holder  460  may be configured to hold and support flexible illumination circuit board  420  in its desired folded configuration and secure camera circuit board  440 , including side pointing viewing elements  116   b  and  116   c  and their corresponding illuminators, in place. 
     Bottom circuit board holder  460  may include a bottom portion  462  and two side portions  464   a  and  464   b  formed as a unitary piece of rigid material, such as brass, stainless steel, aluminum or any other material. 
     Each of side portions  464   a  and  464   b  may be perpendicularly connected to bottom portion  462  at each opposite side and may have an aperture configured to fit side pointing viewing elements  116   b  and  116   c.    
     Front circuit board holder  462  may be configured work in conjunction with bottom circuit board holder  460  and hold and support flexible illumination circuit board  420  in its desired folded configuration and secure camera circuit board  440  including front pointing camera  116   a  and its corresponding illuminator in place. 
     Bottom circuit board holder  460  may be formed as a unitary piece of rigid material, such as brass, stainless steel, aluminum or any other material. 
     The use of metal for the construction of bottom circuit board holder  460  and front circuit board holder  462  may improve electric conductivity and allow efficient heat dissipation. According to some embodiments, bottom circuit board holder  460  and front circuit board holder  462  may be used as a heat sink for some or all of the electronic components located within foldable electronic circuit board  400 , particularly illuminators (such as front illuminators  240   a ,  240   b  and side illuminators  250   a ,  250   b ,  260   a  and  260   b ) and reduce overall temperature of the endoscope tip section. This may solve or at least mitigate a major problem of raised temperatures of endoscope tip and/or any of its components, particularly when using LED illuminators. 
     Reference is now made to  FIGS.  24 A,  24 B and  24 C , which show a perspective view of a camera circuit board  770  of an endoscope assembly according to an embodiment. As an example, the camera circuit board  770  is configured for the endoscope assembly  100  of  FIG.  2 A  that comprises a single front working channel. 
     According to some embodiments, a foldable electronic circuit board may have several internal parts including: a camera circuit board  770 , a flexible illumination circuit board  720  (seen in  FIG.  25   ) and a circuit board holder  780  (seen in  FIG.  24 C ). 
     The internal parts of a foldable electronic circuit board may be configured to be assembled, connected or attached together into a condensed structure having a slim and compact design. 
     Camera circuit board  770  which may be similar to camera circuit board  440  ( FIGS.  23 A through  23 D ) and may be configured to carry a front-pointing camera  716   a  and two side-pointing cameras  716   b ,  716   c  which may be similar to front-pointing camera  116  ( FIG.  2 A ) and may include a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. 
     According to some embodiments, side-pointing cameras  716   b  and  716   c  may be installed such that their field of views are substantially opposing. However, different configurations and number of side-pointing cameras are possible within the general scope of the current specification. 
     A circuit board holder  780 , which is further discussed below, may be configured to hold and support camera circuit board  770 . 
     Reference is now made to  FIG.  25   , which shows a perspective view of a flexible illumination circuit board  720  of an endoscope assembly according to an embodiment. 
     Flexible illumination circuit board  720 , which may be formed as a folded unitary piece of a PCB layer, may include illumination circuit board connector  726 , two main sections  724   a  and  724   b , a front foldable panel  722   a  and four side foldable panels  722   b ,  722   c ,  722   d ,  722   e.    
     It is noted that the number of front and side foldable panels and associated number of front and side illuminators may vary. 
     When flexible illumination circuit board  720  is in a folded configuration, front foldable panel  722   a  and four side foldable panels  722   b ,  722   c ,  722   d ,  722   e  may be configured to fold downwards, forming a right angle with two main sections  724   a  and  724   b.    
     Front foldable panel  722   a  may be configured to carry front illuminators  740   a ,  740   b  and  740   c , which may be associated with front-pointing camera  716   a  ( FIGS.  24 A through  24 C ) and positioned to essentially illuminate front-pointing camera&#39;s  716   a  ( FIGS.  24 A through  24 C ) field of view. 
     When front foldable panel  722   a  is in a folded configuration, it may form a right angle with main sections  724   a  and  724   b  such that it faces forward, essentially at the same direction of front-pointing camera  716   a  ( FIGS.  24 A through  24 C ) and therefore enables front illuminators  740   a ,  740   b  and  740   c , to face the same direction as front-pointing camera  716   a  ( FIGS.  24 A through  24 C ) and essentially illuminate front-pointing camera&#39;s  716   a  ( FIGS.  24 A through  24 C ) field of view. 
     Side foldable panels  722   b ,  722   c  may be configured to carry side illuminators  750   a ,  750   b  respectively, which may be associated with side-pointing camera  716   b  ( FIGS.  24 A through  24 C ) and positioned to essentially illuminate side-pointing camera&#39;s  716   b  ( FIGS.  24 A through  24 C ) field of view. 
     When side foldable panels  722   b ,  722   c  are in a folded configuration, side foldable panels  722   b ,  722   c  may be configured to form a right angle with main section  724   a  such that it faces sideways, essentially at the same direction of side-pointing camera  716   b  ( FIGS.  24 A through  24 C ) and therefore enables side illuminators  750   a ,  750   b , to face the same direction as side-pointing camera  716   b  ( FIGS.  24 A through  24 C ) and essentially illuminate the field of view of side-pointing camera  716   b  ( FIGS.  24 A through  24 C ). 
     Side foldable panels  722   d ,  722   e  may be configured to carry side illuminators  760   a ,  760   b  respectively, which may be associated with side-pointing camera  716   c  ( FIGS.  24 A through  24 C ) and positioned to essentially illuminate side-pointing camera&#39;s  716   c  field of view. 
     When side foldable panels  722   d ,  722   e  are in a folded configuration, side foldable panels  722   d ,  722   e  may be configured to form a right angle with main section  724   b  such that it faces sideways, essentially at the same direction of side-pointing camera  716   c  ( FIGS.  24 A through  24 C ) and therefore enables side illuminators  760   a ,  760   b , to face the same direction as side-pointing camera  716   c  ( FIGS.  24 A through  24 C ) and essentially illuminate side-pointing camera&#39;s  716   c  ( FIGS.  24 A through  24 C ) field of view. 
     Front illuminators  740   a ,  740   b  and side illuminators  750   a ,  750   b ,  760   a  and  760   b  may optionally be discrete illuminators and may include a light-emitting diode (LED), which may be a white light LED, an infrared light LED, a near infrared light LED, an ultraviolet light LED or any other LED. 
     Illumination circuit board connector  726  may be configured to connect flexible illumination circuit board  720  to a circuit board holder  780  ( FIGS.  26 A through  26 D ). 
     Reference is now made to  FIGS.  26 A,  26 B,  26 C and  26 D , which show a perspective view of a foldable electronic circuit board  2600  of an endoscope assembly  800  according to an embodiment. 
     Circuit board holder  780  may be configured to hold and support flexible illumination circuit board  720  in its desired folded configuration and secure camera circuit board  770  including side pointing cameras  716   b  and  716   c  and their corresponding illuminators in place. 
     Circuit board holder  780  may be formed as a unitary piece of rigid material, such as brass, stainless steel, aluminum or any other material. 
     The use of metal for the construction of circuit board holder  780  may improve electric conductivity and allow efficient heat dissipation. According to some embodiments, circuit board holder  780  may be used as a heat sink for some or all of the electronic components located within foldable electronic circuit board  700 , particularly illuminators (such as front illuminators  740   a ,  740   b  and side illuminators  750   a ,  750   b ,  760   a  and  760   b ) and reduce the overall temperature of the endoscope tip section. This may solve or at least mitigate a major problem of raised temperatures of endoscope tip and/or any of its components, particularly when using LED illuminators. 
     Reference is now made to  FIG.  27 A , which shows a perspective view of a tip section  801  of an endoscope assembly  800  (which, in one example, is similar to endoscope assembly  100  of  FIG.  2 A ) according to an embodiment. 
     According to some embodiments, fluid channeling component  2700  may be configured as a separate component from foldable electronic circuit board  2600  ( FIGS.  26 A through  26 D ). This configuration may be adapted to separate the fluid channels and working channels  2740   a , which are located in fluid channeling component  2700 , from the sensitive electronic and optical parts which may be located in the area of the foldable electronic circuit board. 
     According to some embodiments, fluid channeling component  2700  may include a proximal fluid channeling section  2702 , which may have an essentially cylindrical shape, and a primary distal channeling section  2704 . Primary distal fluid channeling section  2704  may partially continue the cylindrical shape of proximal fluid channeling section  2702  and may have a shape of a partial cylinder (optionally elongated partial cylinder). Primary distal fluid channeling section  2704  may form a fraction of the cylinder (along the height axis of the cylinder), wherein the other fraction of the cylinder (along the height axis of the cylinder) is missing. Primary distal fluid channeling section  2704  may be integrally formed as a unitary block with proximal fluid channeling section  2702 . The height of primary distal fluid channeling section  2704  may by higher than that of proximal fluid channeling section  2702 . In the embodiment comprising primary distal fluid channeling section  2704 , the section  2704  may have the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) and provide a space to accommodate foldable electronic circuit board  2600  ( FIGS.  26 A through  26 D ). 
     Proximal fluid channeling section  2702  may include integrated screw nuts  2706   b , which may be configured for securing tip section  801  to the endoscope shaft. 
     Primary distal fluid channeling section  2704  may include working channel  2740   a  which may be configured for insertion of a medical (such as a surgical) tool, for example, to remove, treat and/or extract a sample of the object of interest found in the colon or its entirety for biopsy. 
     According to various embodiments, a fluid channeling component, such as component  2700 , may be used for heat transfer purposes. The fluid channeling component, according to embodiments of the specification (such as fluid channeling component  2700 ), can be used as a heat sink for some or all of the illuminators (such as side or front LEDs) and/or other electronic components, and reduce overall temperature of the endoscope tip. This may solve or at least mitigate a major problem of raised temperatures of the endoscope tip and/or any of its components, particularly when using LED illuminators. 
       FIG.  27 B  shows a fluid channeling component  2700  separated out from the tip section assembly  801  of  FIG.  27 A . Fluid channeling component  2700  includes a front portion  2750  (shown here as formed as two front portions  2750   a  and  2750   b ), supporting the back sides (opposing to the sides where the LEDs are attached) of the first front LED surface and second front LED surface, respectively. Front portions  2750   a  and  2750   b  form an arc shape between them which is configured to accommodate and support forward looking viewing element  716   a  of  FIG.  27 A . According to some embodiments, front portion  2750  distally protrudes from front face  2720 . A jet channel opening  2744  and an injector channel opening  2764  are also seen on the front face  2720 . 
     Fluid channeling component  2700  further includes a first side portion  2760  and a second, opposite side portion on the two opposing sides thereof. Each of side portions include two small openings for the side LEDs ( 260   a ,  260   b  of one side in  FIG.  27 A , the LEDs on the other side are not visible) and one opening for side looking viewing elements. 
     Each of the side portions further includes an I/I injector opening, I/I injector opening  2766   b  aimed at side optical assembly  716   b  of  FIG.  27 A  on the first side portion  2760 , and a similar I/I injector opening on the second, opposite side portion, used for injecting fluid (the term “fluid” may also include gas and/or liquid) to wash contaminants such as blood, feces and other debris from side optical assemblies of side looking viewing elements. According to some embodiments, the openings may supply liquid for cleaning any of the tip elements (such as any optical assembly, windows, LEDs, and other elements). 
     Each of the side portions further includes two viewing element holders, for example viewing element holders  2730   a  and  2730   b  of first side portion  2760   b , adapted to receive a viewing element bridge which is adapted to support assemblies ( 716   b  of  FIG.  27 A ) of side looking viewing elements. 
       FIG.  28 A  illustrates an upper base board and a lower base board associated with a fluid channeling component wherein jet and nozzle openings may be placed adjacent to each other or on either side of a working/service channel and adapted to support the optical assembly and illuminators of an endoscope, in accordance with an embodiment of the present specification.  FIG.  28 A  illustrates upper base board  2802  and lower base board  2804  supporting the optical assembly and illuminators shown in the endoscope assembly  6400  of  FIG.  64   . The front optical assembly comprises a front lens assembly  2806  and a front image sensor. The side optical assembly comprises a side lens assembly  2814  and a side image sensor. The front image sensor&#39;s pins and rigid area  2820  are bent to be soldered to the upper base board  2802  and lower base board  2804 . The side image sensors&#39; pins and rigid areas  2822  and  2824  (for the right and left side image sensors respectively) are bent to be soldered to the upper base board  2802  and lower base board  2804 . The upper base board  2802  and the lower base board  2804  have grooves/holes enabling the front and side illuminators to be placed within the grooves/holes. The upper and lower base boards  2802 ,  2804  hold three sets of front illuminators  2808 ,  2810 ,  2812  and on each side panel two sets of illuminators  2816 ,  2818  (the figure illustrates only one side panel of the endoscope, however it should be understood by those of ordinary skill in the art that the other side panel is equivalent to this side panel). Front illuminators  2808 ,  2812  are placed between the upper and lower base boards  2802 ,  2804 , while front illuminator  2810  is placed above front lens assembly  2806 . The two sets of illuminators  2816 ,  2818  are placed between the upper and lower base boards  2802 ,  2804 . 
     As shown in  FIG.  28 A , jet opening  2826  and nozzle opening  2824 ′ may be positioned adjacent to each other on front panel of the tip in accordance with an embodiment. In another embodiment, the jet opening  2826  and nozzle opening  2824 ′ may be positioned on either side of the working/service channel opening  2822 ′ on the front panel of the tip. A tip cover sheaths the endoscope tip and the components therein. 
       FIG.  28 B  illustrates a top view of an upper base board  2802  adapted to support the optical assembly and illuminators of an endoscope, in accordance with an embodiment of the present specification. In various embodiments, the upper base board  2802  is provided with grooves/holes  2832  for the front illuminators  2808 ,  2810 ,  2812  and for the first set of side illuminators  2816 ,  2818  and the second set of side illuminators to be placed within. In the illustrated embodiment, one groove is provided on the upper base board  2802  for each illuminator supported by the upper base board  2802 . In one embodiment, grooves  2832  are identical for all illuminators, while in another embodiment each groove may be adapted to different sizes of illuminators. For example, different sizes of illuminators may comprise LEDs (Light Emitting Diode) adapted to emit white light, infrared light, ultraviolet light, near-infrared light and other wavelengths of light. 
     An electrical cable  2850  threaded through the upper base board  2802 , in one embodiment, transfers the information from the optical assemblies to the illuminators and to a main control unit. 
       FIG.  28 C  illustrates a bottom side view of a lower base board  2804  of the electronic circuit board adapted to support the optical assembly and illuminators of an endoscope, in accordance with an embodiment of the present specification. In various embodiments, the lower base board  2804  is provided with grooves/holes  2834  for front illuminators  2808 ,  2810 ,  2812  and for the first set of side illuminators  2816 ,  2818  and the second set of side illuminators to be placed within. In the illustrated embodiment, one groove is provided on the lower base board  2804  for each illuminator supported by the base board  2804 . In various embodiments, the pins and the rigid area(s) of the endoscope&#39;s image sensors are bent to be soldered to the upper and lower base boards  2802 ,  2804 . In one embodiment, grooves  2834  are identical for all illuminators, while in another embodiment each groove may be adapted to different sizes of illuminators. For example, different sizes of illuminators may comprise LEDs (Light Emitting Diode) adapted to emit white light, infrared light, ultraviolet light, near-infrared light and other wavelengths of light. 
       FIG.  29 A  illustrates the optical assembly and illuminators supported by a lower base board  2902  with the upper base board shown in  FIG.  28 A  removed. In an embodiment, metal frames are provided to hold the front and side lens assemblies and also to support the associated image sensors. As illustrated, a metal frame  2904  is provided to support front lens assembly  2906  and support the image sensor  308  associated with the front lens assembly  2906 . Metal frames  2910  and  2912  are provided to support side lens assemblies  2914 ,  2916  and support the associated image sensors  2918  and  2920 , respectively. In an embodiment, the metal frames  2904 ,  2910 ,  2912  may also serve as a heat sink to the light emitting diodes (LEDs) and sensors incorporated in the endoscope. Illuminators  2922  are attached to the lower base board  2902  by means of grooves/holes (shown in  FIG.  29 B ) made in the lower base board  2902 . 
       FIG.  29 B  illustrates another view of the optical assembly supported by a lower base board  2902  as shown in  FIG.  29 A  with the illuminators  2922  (shown in  FIG.  29 A ) removed. The lower base board  2902  comprises grooves  2924  for enabling the illuminators  2922  (shown in  FIG.  29 A ) to be coupled with the based board  2902 . 
       FIG.  29 C  illustrates a bottom view of the optical assembly supported by a lower base board  2902  as shown in  FIG.  29 B  with the illuminators  2922  removed. As shown, the lower base board  2902  fits around the image sensors exposing the image contact areas and supports the lens assemblies. The grooves  2924  allow the illuminators  2922  (shown in  FIG.  29 A ) to be secured to the base board  2902 . 
       FIG.  30 A  illustrates an image sensor  3002  (shown as  2908 ,  2918  and  2920  in  FIGS.  29 A,  29 B, and  29 C , respectively) in a folded position as when placed between upper and lower base boards, in accordance with an embodiment of the present specification. As shown, the image sensor  3002  comprises two horizontal bent image sensor contact areas  3002   a  and  3002   b , positioned parallel to a plane of the upper and lower base boards (not shown in figure). The image sensor contact areas  3002   a  and  3002   b  comprise a plurality of connector pins. The image sensor  3002  further comprises a vertical portion positioned between the image sensor contact areas  3002   a  and  3002   b . A top edge of the vertical portion is coupled with an edge of the image sensor contact area  3002   a  while a bottom edge of the vertical portion is coupled with an edge of the image sensor contact area  3002   b , as shown in  FIG.  30 A . The vertical portion comprises a first surface  3010  which in an embodiment is made of glass and an opposing second surface  3012  which in an embodiment comprises a printed circuit board or a computer chip. 
     The image sensor  402  captures still images and/or video feeds and in various embodiments comprises a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor (not shown in figure). The image sensor  3002  is incorporated in the endoscope and is associated with a lens assembly as illustrated in  FIGS.  28 A through  28 C and  29 A through  29 C . In an embodiment, three sets of optical assemblies, each comprising a lens assembly associated with an image sensor in a folded position as shown in  FIG.  30 A , are assembled in a tip portion of the endoscope. The three sets of optical assemblies comprise a front lens assembly associated with a front image sensor, a first side lens assembly associated with a first side image sensor and a second side assembly associated with a second side image sensor. The two side image sensors are assembled back to back as shown in  FIGS.  29 A through  29 C  such that the two glass surfaces  3010  are facing in opposite directions. 
     In the embodiment illustrated in  FIG.  30 A , the folded position of the image sensor  3002  causes the first glass surface  3010  of the image sensor  3002  associated with a front lens assembly to face in a direction of the tip of the endoscope when the image sensor  3002  is positioned between upper and lower base boards (not shown in  FIG.  30 A ) and assembled in the tip portion of the endoscope. The second opposing surface  3012  faces in an opposite direction towards an electrical connector end of the endoscope when the image sensor  3002  is in the illustrated folded position. Once the image sensor  3002  is assembled within an endoscope, the front glass surface  3010  faces forward and in an outward direction when viewed with respect to the center of the endoscope tip. 
       FIG.  30 B  illustrates a lens assembly  404  being coupled with the image sensor  3002 . As illustrated, the lens assembly  3004  is positioned between the image sensor contact areas  3002   a  and  3002   b , such that a rear portion of the lens assembly  3004  is closely associated and/or in contact with the first glass surface  3010  of the image sensor  3002 . In the assembled position as shown in  FIG.  30 B , a front portion of the lens assembly  3004  projects in an outward direction and the lens assembly  3004  extends outwards beyond the area defined by the image sensor contact areas  3002   a  and  3002   b . Hence, the effective area occupied by just the lens assembly  3004  on a circuit board of the endoscope is limited to the portion of the lens assembly  3004  that extends outwards beyond the area occupied by the image sensor contact areas  3002   a  and  3002   b  as shown in  FIG.  30 B . 
     The folded position of the image sensor  3002  reduces the length of space occupied by the lens assembly  3004  on a circuit board placed in an endoscope tip, thereby enabling the two side optical assemblies to be placed closer to each other than would have been possible with the methods of folding the image sensor used in prior art. This reduces the distance between the first and the second side assemblies  6406 ,  6408  illustrated in  FIG.  64   . Hence, due to the folding position of the image sensor as illustrated, each of the side optic assembly occupies approximately 1.3 mm less space on the endoscope circuit board, thereby leading to the diameter of the endoscope tip being reduced by approximately 2.6 mm as compared to prior art. 
       FIG.  30 C  illustrates a metal frame  3006  positioned to support and hold the lens assembly  3004  and the associated image sensor  3002 . As shown, the metal frame  3006  is molded to enclose the lens assembly  3002  in a manner that supports the image sensor  3002  and the image sensor contact areas  3002   a  and  3002   b.    
     In an embodiment of the present specification, a viewing element holder is employed for supporting the lens assembly and the image sensor as well as the illuminators associated with the lens assembly.  FIG.  31 A  illustrates a viewing element holder for supporting a lens assembly, image sensor and side illuminators, in accordance with an embodiment of the present specification. As illustrated, viewing element holder  3102  which, in one embodiment, is a metal frame, is fitted around image sensor  3104 , lens assembly  3106  and illuminators  3108 ,  3110 , such that image sensor contact area  3112  is exposed as shown. The frame  3102  provides support to the image sensor  3104 , lens assembly  3106  and illuminators  3108 ,  3110 , enabling the said components to remain in a fixed position. In an embodiment, the image sensor  3104  is coupled with the frame  3102  in a manner identical to that illustrated in  FIGS.  30 B and  30 C . The folding position of the image sensor  3104  inside the viewing element holder  3102  results in a reduction of the endoscope tip diameter. Further, in various embodiments, the image sensor  3104  is soldered to upper and lower base boards such as shown in  FIG.  28 B . 
       FIG.  31 B  illustrates grooves built in the viewing element holder for supporting the illuminators, in accordance with an embodiment of the present specification. Grooves  3114  and  3116  are provided in the viewing element holder  3102  for supporting illuminators  3108  and  3110  (shown in  FIG.  31 A ) respectively. In one embodiment grooves  3114 ,  3116  are identical for all illuminators, while in another embodiment each groove may be adapted to different sizes of illuminators. For example, different sizes of illuminators may comprise LEDs (Light Emitting Diode) adapted to emit white light, infrared light, ultraviolet light, near-infrared light and other wavelengths of light. In other embodiments, more number of grooves may be provided in the viewing element holder  3102  in order to support more number of illuminators. 
       FIG.  32 A  illustrates a plurality of viewing element holders that are assembled to be placed in a tip of an endoscope, in accordance with an embodiment of the present specification. As shown in the figure, viewing element holder metal frame  3202  supports a front lens assembly  3204 , associated image sensor  3206  and illuminators  3208  and  3210 . Viewing element holder metal frame  3212  supports a side lens assembly  3214 , associated image sensor  3216  and illuminators  3218  and  3220 . Viewing element holder metal frame  3222  supports a side lens assembly  3224 , associated image sensor  3226  and illuminators  3228  and  3230 . In various embodiments, the viewing element holder metal frames act as a heat sink for the light emitting diodes employed in the illuminators. In one embodiment, a metal component, such as metal supporting frame  3250  is placed between the viewing element holders  3202 ,  3212  and  3222 . Metal supporting frame  3250  acts as a heat sink for the illuminators and also supports the viewing element holders  3202 ,  3212  and  3222  by fixedly placing them between the upper and lower base boards (not shown in  FIG.  32 A ). The metal supporting frame  3250  may also integrate with the optical assemblies and act as a heat sink for the LEDs while supporting the optical assemblies to be fixedly placed between the upper and lower base boards. 
       FIG.  32 B  illustrates the assembly shown in  FIG.  32 A  coupled with an upper circuit board  3252  and a lower circuit board  3254  and associated with a fluid channeling component  3270  in a tip of an endoscope, in accordance with an embodiment of the present specification. The metal supporting frame  3250  of the front viewing element holder  3202 , first side viewing element holder  3212  and a second side viewing element holder is adapted to act as a heat sink and is connected to the fluid channeling component  3270  such that the heat generated by the front illuminators  3208 ,  3210 , the first side illuminators  3218 ,  3220 , and second side illuminators and associated sensors may be transferred to the fluid channeling component  3270 , causing a lowering of the temperature of the tip of the endoscope. 
     Also shown in  FIG.  32 B  is jet opening  3226 ′ and nozzle opening  3224 ′ which may be positioned adjacent to each other on front panel of the tip. In another embodiment, the jet opening  3226 ′ and nozzle opening  3224 ′ may be positioned on either side of the working/service channel opening  3222 ′ on the front panel of the tip. A tip cover sheaths the endoscope tip and the components therein. 
     The present specification discloses circuit boards particularly designed to hold front and side illuminators (associated with front and side optical assemblies of an endoscope respectively) in a desired position within a tip portion of an endoscope. The use of the illuminator circuit boards provided by the present specification eases the assembly of the illuminators within the circuit board placed in an endoscope&#39;s tip portion, as the illuminator boards pre-define precise locations for the front and side illuminators. 
     The present specification provides a convenient way of separating the optical assemblies from their associated illuminators. It is easier to first assemble an optical assembly and then to place the associated illuminators within the confined space of an endoscope tip. As the sizes of the components in an assembled endoscope&#39;s tip are very small, the pre-defined illuminator board helps keep all the components in desired, fixed positions. 
       FIG.  33 A  illustrates a front illuminator electronic circuit board  3306  adapted for supporting the front illuminators  3308   a ,  3308   b ,  3308   c  of an endoscope, in accordance with an embodiment of the present specification.  FIG.  33 A  illustrates upper base board  3302 , lower base board  3304 , a front illuminator electronic circuit board  3306  for supporting the front illuminators  3308   a ,  3308   b ,  3308   c , and a side illuminator electronic circuit board  3310  for supporting the side illuminators  3312   a ,  3312   b . The front illuminators  3308   a ,  3308   b ,  3308   c  are associated with a front optical assembly comprising a front lens assembly  3314  and a front image sensor. The side illuminators  3312   a ,  3312   b  are associated with a side optical assembly comprising a side lens assembly  3316  and a side image sensor. The front image sensor&#39;s pins and rigid area  3320  are bent to be soldered to the upper base board  3302  and lower base board  3304 . The side image sensors&#39; pins and rigid areas  3322  and  3324  (for the right and left side image sensors respectively) are bent to be soldered to the upper base board  3302  and lower base board  3304 . An electrical cable  3350  threaded through the upper base board  3302  transfers the information from the optical assemblies to a main control unit. 
     The front illuminator electronic circuit board  3306  holds a set of three front illuminators  3308   a ,  3308   b , and  3308   c . On each side panel, a side illuminator electronic circuit board  3310  holds a set of side illuminators  3312   a ,  3312   b  (the figure illustrates only one side panel of the endoscope, however it should be understood by those of ordinary skill in the art that the other side panel is equivalent to the shown side panel). In one embodiment, front illuminators  3308   a ,  3308   b  are positioned between the upper  3302  and lower  3304  base boards while front illuminator  3308   c  is positioned above front lens assembly  3314  and above the upper base board  3302 . The two side illuminators  3312   a ,  3312   b  on both sides of the endoscope tip are positioned between the upper  3302  and lower  3304  base boards on either side of the side lens assembly  3316 . 
     In various embodiments, any material that is used for constructing a PCB (Printed circuit boards) may be used for constructing the front and side illuminator circuit boards. Typical materials used for making PCB boards are ceramic, polyamides for flexible board, and glass-reinforced epoxy, such as, FR4 (a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (self-extinguishing)). Also in various embodiments, the front and side illuminator circuit boards may or may not be made of the same materials as the upper and lower base boards. 
       FIG.  33 B  illustrates upper  3302  and lower  3304  base boards integrated with the front  3306  and side  3310  illuminator electronic circuit boards, in accordance with an embodiment of the present specification. As shown, the front illuminator electronic circuit board  3306  is integrated with the upper base board  3302  and lower base board  3304  and holds the front illuminators  3308   a ,  3308   b ,  3308   c  in place and enables the front lens assembly  3314  to protrude therethrough. The side illuminator circuit board  3310  is positioned in a side panel of the endoscope tip between the upper base board  3302  and lower base board  3304  and the side illuminators  3312   a ,  3312   b  in place and enables the side lens assembly  3316  to protrude therethrough. An electrical cable  3350  threaded through the upper base board  3302  transfers the information from the optical assemblies to the illuminators and to a main control unit. 
       FIG.  34    illustrates optical assemblies and illuminators supported by an upper base board  3402  with the lower base board shown as  3304  in  FIG.  33 A  removed to assist visualization. With regards to  FIG.  34   , the endoscope tip has been flipped about its horizontal axis such that the tip is being viewed from its underside as compared to the view depicted in  FIG.  33   . In an embodiment, a metal frame  3405  having front  3411  and rear  3413  portions is provided to support the associated image sensors  3415 ,  3417 ,  3419  and also the front  3414  and side  3416 ,  3418  lens assemblies. In various embodiments, the illuminator circuit boards  3406 ,  3410  and  3420  are soldered to the lower (removed for visualization) and upper  3402  base boards and are supported by the metal frame  3405 . As illustrated, the metal frame  3405  includes a front portion  3411  provided to support the front lens assembly  3414  and support the front image sensor  3415  associated with the front lens assembly  3414 . The front  3411  and rear  3413  portions of the metal frame  3405  support the side lens assemblies  3416 ,  3418  and support their associated image sensors  3417 ,  3419 , respectively. In an embodiment, the metal frame  3405  also serves as a heat sink to the light emitting diodes (LEDs) and sensors incorporated in the endoscope. 
     A front illuminator circuit board  3406  holds the front illuminators  3408   a ,  3408   b ,  3408   c  in place and two side illuminator circuit boards  3410 ,  3420  hold the side illuminators  3412   a ,  3412   b  and  3422   a ,  3422   b  respectively, associated with the side optical lens assemblies  3416  and  3418  respectively, in place. A left side illuminator circuit board  3410  supports the side illuminators  3412   a ,  3412   b . A right side illuminator circuit board  3420  supports the illuminators  3422   a ,  3422   b  associated with the right side lens assembly  3418 . In an embodiment, the front illuminators circuit board  3406  is soldered to the metal frame  3405  which supports all three optical assemblies and separates the optical assemblies form one another. In one embodiment, the front illuminator circuit board  3406  is supported by a front portion  3411  of the metal frame and the side illuminator circuit boards  3410 ,  3420  are supported by both the front portion  3411  and a rear portion  3413  of the metal frame  3405 . 
     In one embodiment, front illuminator circuit board  3406  is adapted to hold three sets of illuminators  3408   a ,  3408   b ,  3408   c  in place, wherein each set of illuminators may have 1, 2, 3 or more light sources such as, but not limited to, an LED. In one embodiment, side illuminator circuit boards  3410  and  3420  are adapted to hold two set of illuminators  3412   a ,  3412   b  and  3422   a ,  3422   b  in place, wherein each set of illuminators may have 1, 2, 3 or more light sources such as, but not limited to, an LED. 
       FIG.  35 A  illustrates the metal frame  3505  and illuminator circuit boards  3506 ,  3510 ,  3520  of  FIG.  34    with the optical assemblies and upper base board removed to assist with visualization. Metal frame  3505  comprises a front recess area  3521  for a front lens assembly to protrude therethrough, a first side recess area  3523  for a first side lens assembly to protrude therethrough and a second side recess area  3525  on an opposite side for a second side lens assembly to protrude therethrough. A front illuminator electronic circuit board  3506  holds front illuminators  3508   a ,  3508   b ,  3508   c . As can be seen in the figure, the front illuminator electronic circuit board  3506  is ‘U’ shaped and is coupled with the metal frame  3505  in a manner such that the front recess  3521  of the metal frame  3505  aligns with the inner surface of the curved portion of the ‘U’ shaped circuit board  3506 . 
     Side illuminator electronic circuit boards  3510 , 3520  hold side illuminators  3512   a ,  3512   b  and  3522   a ,  3522   b  respectively. As can be seen in the figure, the side illuminator electronic circuit boards  3510 ,  3520  are ‘U’ shaped and are coupled with the metal frame  3505  in a manner such that the side recesses  3523 ,  3525  of the metal frame  3505  align with the inner surface of the curved portions of the ‘U’ shaped circuit boards  3510 ,  3520 . 
       FIG.  35 B  illustrates the metal frame  3505  with the illuminator circuit boards shown in  FIG.  35 A  removed. In one embodiment, as depicted in  FIG.  35 B , the metal frame  3505  approximates an ‘H’ shape with side support walls  3512   a ,  3512   b ,  3520   a ,  3520   b  extending outwardly at 90 degrees from each leg of the ‘H’. Two front support walls  3506   a ,  3506   b  are positioned at the end of and perpendicular to side support walls  3520   a ,  3512   a  respectively. The metal frame  3505  is designed to comprise recesses  3521 ,  3523 ,  3525  to accommodate the front lens assembly and the two side lens assemblies respectively in an endoscope tip. The frame  3505  comprises: front support walls  3506   a  and  3506   b  for supporting the front illuminator electronic circuit board shown as  3506  in  FIG.  35 A ; side support walls  3512   a ,  3512   b  for supporting the side illuminator electronic circuit board shown as  3510  in  FIG.  35 A ; and support walls  3520   a ,  3520   b  for supporting the second side illuminator electronic circuit board shown as  3520  in  FIG.  35 A . 
       FIG.  36    illustrates a front illuminator electronic circuit board  3606 , in accordance with an embodiment of the present specification. In one embodiment, as depicted in  FIG.  36   , the circuit board  3606  is shaped as a ‘U’ and holds front illuminators  3608   a ,  3608   b ,  3608   c  in place. In various embodiments, the length l of the front illuminator electronic circuit board  3606  ranges from 7.5 mm to 9.5 mm and in an embodiment the length l is approximately 8.8 mm. In various embodiments, the height h of the front illuminator electronic circuit board  3606  ranges from 5 mm to 6.5 mm and in an embodiment the height h is approximately 5.7 mm. 
       FIG.  37    illustrates a side illuminator electronic circuit board  3710 , in accordance with an embodiment of the present specification. In one embodiment, as depicted in  FIG.  37   , the circuit board  3710  is shaped as a ‘U’ and holds side illuminators  3712   a ,  3712   b  in place. In various embodiments, the length l of the side illuminator electronic circuit board  3710  ranges from 7.5 mm to 9.5 mm and in an embodiment the length l is approximately 8.8 mm. In various embodiments, the height h of the side illuminator electronic circuit board  3710  ranges from 3 mm to 4.5 mm and in an embodiment the height h is approximately 3.7 mm. 
     According to another aspect of the present specification, an advantageous configuration of the electronic circuit board assembly enables having a slim and compact design of the endoscope. The configuration of the electronic circuit board assembly, in this embodiment, is described with reference to a tip section that includes a single side looking viewing element. However, in alternate embodiments, tip section may include more than one side looking viewing elements—in which case, the side looking viewing elements may be installed such that their fields of views are substantially opposing. However, different configurations and number of side looking viewing elements are possible within the general scope of the current specification. 
     Reference is now made to  FIGS.  38 A through  38 F  which show exploded views of a plurality of internal parts of an electronic circuit board assembly, which when assembled, connected or attached together, form a condensed tip section of a multi-viewing elements endoscope, according to an aspect of the present specification. 
     Additionally, it should be noted that the plurality of internal parts of the electronic circuit board assembly may be electrically connected and may be configured to share resources, such as electrical power and electrical signals. 
       FIG.  38 A  illustrates a base board  3805  of an electronic circuit board assembly in accordance with one embodiment of the present specification. Referring to  FIG.  38 A , the base board  3805  is shaped roughly as an “L” with a first member  3805   a  extending in a y direction and in an x direction. The first member  3805   a  is integrally formed with a second member  3805   b , wherein said first member  3805   a  and said second member  3805   b  lie in the same horizontal plane and said second member  3805   b  extends from said first member  3805   a  at an angle of substantially 90 degrees. The second member  3805   b  extends in a y direction and in an x direction. In one embodiment, the length of the second member  3805   b  is greater than the length of the first member  3805   a . In other words, the second member  3805   b  extends further in the x direction than the first member  3805   a  extends in they direction. In one embodiment, the second member  3805   b  is further integrally formed with an offset member  3805   c  at the end of the second member  3805   b  that is opposite the end to which the first member  3805   a  is formed. The offset member  3805   c  lies in the same horizontal plane as the first member  3805   a  and second member  3805   b  and extends in a y direction and in an x direction. In one embodiment, the offset member  3805   c  is offset from the second member  3805   b  in the same y direction in which the first member  3805   a  is formed to the second member  3805   b . In one embodiment, each member  3805   a ,  3805   b ,  3805   c  has the same thickness and therefore the entire base board  3805  has a single thickness. 
     In one embodiment, the first member  3805   a  comprises at least two openings  3806  for the insertion of attachment pegs of a first metal frame as described with reference to  FIGS.  38 B and  38 C  below. In one embodiment, the second member  3805   b  comprises at least two openings  3807  for the insertion of attachment pegs of a second metal frame as described with reference to  FIGS.  38 B and  38 C  below. In one embodiment, the offset member comprises at least one opening  3808  for a multi-wire electrical cable which is welded on the base board  3805  in a designated location, thereby freeing additional space within the tip assembly. The opening  3808  is where the electrical cable is welded to the base board  3805 . 
       FIG.  38 B  illustrates one embodiment of a first metal frame  3810  and a second metal frame  3812  for supporting a front looking viewing element and a side looking viewing element respectively, of an electronic circuit board assembly. In one embodiment, the first metal frame  3810  and the second metal frame  3812  are identical in shape. The first and second metal frames  3810 ,  3812  comprise substantially rectangular shaped metal bodies  3840   a ,  3840   b  each having a substantially oval shaped opening  3841   a ,  3841   b  at the center of each metal body  3840   a ,  3840   b . In addition, each metal body  3840   a ,  3840   b  comprises a top surface  3842   a ,  3842   b  and a bottom surface  3843   a ,  3843   b . Extending from the bottom surface  3843   a ,  3843   b  of each metal body  3840   a ,  3840   b  are at least two attachment pegs  3844   a ,  3844   b  to be inserted into corresponding openings in the first and second members of the base board as discussed with reference to  FIGS.  38 A and  38 C . 
     Further, each metal body  3840   a ,  3840   b  includes a front surface  3845   a ,  3845   b  comprising a first pair of side walls  3846   a ,  3846   b  and a rear surface  3847   a ,  3847   b  comprising a second pair of side walls  3848   a ,  3848   b . The front surfaces  3845   a ,  3845   b  and first pairs of side walls  3846   a ,  3846   b  are configured to receive image sensors as discussed with reference to  FIG.  38 G  below. The rear surfaces  3847   a ,  3847   b  and second pairs of side walls  3848   a ,  3848   b  are configured to receive printed circuit boards as discussed with reference to  FIG.  38 E  below. 
       FIG.  38 C  illustrates a first intermediate assembly  3815  with first  3810  and second  3812  metal frames placed on the base board  3805  of an electronic circuit board assembly, in accordance with one embodiment of the present specification. The attachment pegs ( 3844   a  in  FIG.  38 B ) of the first metal frame  3810  have been inserted into the openings ( 3806  in  FIG.  38 A ) of the first member  3805   a  of the base board  3805 . The first metal frame  3810  is attached to the base board  3805  such that the front surface  3845   a  of the first metal frame  3810  faces forward and outward from the center of the endoscope tip and the rear surface  3847   a  of the first metal frame  3810  faces inward toward the center of the endoscope tip, once fully assembled. The attachment pegs ( 3844   b  in  FIG.  38 B ) of the second metal frame  3812  have been inserted into the openings ( 3807  in  FIG.  38 A ) of the second member  3805   b  of the base board  3805 . The second metal frame  3812  is attached to the base board  3805  such that the front surface  3845   b  of the second metal frame  3812  faces sideward and outward from the center of the endoscope tip and the rear surface  3847   b  of the second metal frame  3812  faces inward toward the center of the endoscope tip, once fully assembled. In one embodiment, the first  3810  and second  3812  metal frames are soldered to the base board  3805 . 
     In one embodiment, the base board  3805  is rigid while in another embodiment it is semi-rigid. The two metal frames  3810 ,  3812  form base structures for respectively supporting a front and a side looking viewing element of the endoscope. The metal frames  3810 ,  3812  are placed on the base board  3805  such that the respective central axes  3811 ,  3813  of the frames form an angle ‘N’ to each other. In various embodiments, the angle ‘N’ ranges from 70 to 135 degrees. In one embodiment the angle ‘N’ is 90 degrees. 
       FIG.  38 D  illustrates one embodiment of a first printed circuit board  3817  and a second printed circuit board  3818  for inclusion with an electronic circuit board assembly. In one embodiment, the printed circuit boards  3817 ,  3818  are substantially rectangular shaped and each includes a top surface  3852   a ,  3852   b , a bottom surface  3853   a ,  3853   b , a front surface  3855   a ,  3855   b , a rear surface  3857   a ,  3857   b , and two side surfaces  3858   a ,  3858   b.    
     Referring to  FIG.  38 E , the two printed circuit boards (PCBs)  3817 ,  3818  are placed against the rear surfaces  3847   a ,  3847   b  of the respective metal frames  3810 ,  3812  to form a second intermediate assembly  3820 . In one embodiment, the first printed circuit board  3817  is positioned on the base board  3805  such that the front surface ( 3855   a  in  FIG.  38 D ) of the first printed circuit board  3817  touches the rear surface  3847   a  of the first metal frame  3810  and the side surfaces ( 3858   a  in  FIG.  38 D ) of the first printed circuit board  3817  touch the second pair of side walls  3848   a  of the first metal frame  3810 . In one embodiment, the second printed circuit board  3818  is positioned on the base board  3805  such that the front surface ( 3855   b  in  FIG.  38 D ) of the second printed circuit board  3818  touches the rear surface  3847   b  of the second metal frame  3812  and the side surfaces ( 3858   b  in  FIG.  38 D ) of the second printed circuit board  3818  touch the second pair of side walls  3848   b  of the second metal frame  3812 . In another embodiment, the printed circuit boards  3817 ,  3818  are flipped horizontally such that their rear surfaces ( 3857   a ,  3857   b  in  FIG.  38 D ) touch the rear surfaces  3847   a ,  3847   b  of the metal frames  3810 ,  3812 . In both embodiments, the rear surfaces  3847   a ,  3847   b  and second pairs of side walls  3848   a ,  3848   b  of the metal frames  3810 ,  3812  act to contain the printed circuit boards  3817 ,  3818 . In one embodiment, the printed circuit boards  3817 ,  3818  fit snugly within the pairs of side walls  3848   a ,  3848   b  and against the rear surfaces  3847   a ,  3847   b  of the metal frames  3810 ,  3812 . The snug fit helps to maximize the use of available area in the tip, allowing the endoscope tip to have a smaller overall diameter. In one embodiment, the bottom surfaces  3853   a ,  3853   b  of the printed circuit boards  3817 ,  3818  are soldered to the base board  3805 . 
       FIG.  38 F  illustrates horizontal and side views of an image sensor  3822  with a first plurality of connector pins  3824  on a first end of the sensor  3822  and a second plurality of connector pins  3825  on the opposite side of the sensor, in accordance with one embodiment of the present specification. The image sensor  3822  includes an outer surface comprising a piece of glass  3822   a  and an inner surface comprising a printed circuit board or computer chip  3822   b . The image sensor  3822  captures still images and/or video feeds and in various embodiments comprises a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor. 
       FIG.  38 G  illustrates one embodiment of a third intermediate assembly  3825  formed by attaching image sensors  3822 ,  3823  to a second intermediate assembly ( 3820  from  FIG.  38 E ). In one embodiment, a first image sensor  3822  is positioned such that the inner surface of the first image sensor  3822 , comprising a computer chip, comes to rest on the front surface  3845   a  and between the first pair of side walls  3846   a  of the first metal frame  3810 . In this manner, the outer surface of the first image sensor  3822 , comprising a piece of glass  3822   a , faces forward and outward from the center of the endoscope tip, once fully assembled. The first plurality of connector pins  3824   a  on a first end of the image sensor  3822  is folded underneath the base board  3805  and soldered to the base board  3805 . The second plurality of connector pins  3825   a  on a second end of the first image sensor  3822  is folded over the top surface of the first metal frame  3810  and soldered to the first printed circuit board  3817 . In one embodiment, a second image sensor  3823  is positioned such that the inner surface of the second image sensor  3823 , comprising a computer chip, comes to rest on the front surface  3845   b  and between the first pair of side walls  3846   b  of the second metal frame  3812 . In this manner, the outer surface of the second image sensor  3823 , comprising a piece of glass, faces sideward and outward from the center of the endoscope tip, once fully assembled. The first plurality of connector pins on a first end of the image sensor  3823  is folded underneath the base board  3805  and soldered to the base board  3805 . The second plurality of connector pins  3825   b  on a second end of the second image sensor  3823  is folded over the top surface of the second metal frame  3812  and soldered to the second printed circuit board  3818 . In accordance with an embodiment, the front and side looking image sensors  3822 ,  3823  are similar or identical in terms of, for example, field of view, resolution, light sensitivity, pixel size, focal length, focal distance and/or the like. 
     The printed circuit boards  3817 ,  3818  supply respective front and side looking viewing sensors  3822 ,  3823  with electrical power and derive still images and/or video feeds captured by the image sensors. 
     In accordance with an embodiment, each of the front and side looking image sensors  3822 ,  3823  has a lens assembly mounted on their outer surfaces to provide necessary optics for receiving images. Each lens assembly comprises a plurality of lenses, static or movable, which provide a field of view of at least 90 degrees and up to essentially 180 degrees. Front looking image sensor  3822  and corresponding lens assembly with associated printed circuit board  3817  are together referred to as the ‘front looking viewing element’. Similarly, side looking sensor  3823  and corresponding lens assembly with associated printed circuit board  3818  are together referred to as the ‘side looking viewing element’. 
     Persons of ordinary skill in the art should note that the metal frames  3810 ,  3812  not only serve as mechanical support to the printed circuit boards  3817 ,  3818  and sensors  3822 ,  3823 , thereby providing structural ruggedness, but also act as heat sinks, allowing efficient heat dissipation from the sensors  3822 ,  3823 . 
       FIG.  38 Ha  illustrates one embodiment of a front illumination circuit board  3826   a  comprising a front panel  3827   a  approximating a “U” shape. In one embodiment, the front panel  3827   a  is configured to carry three sets of front illuminators  3829   a ,  3829   b ,  3829   c  wherein each set comprises a single illuminator element. In other embodiments, the front foldable panel  3827   a  may be configured to carry three sets of front illuminators  3829   a ,  3829   b ,  3829   c  wherein each set may further comprise 2, 3, or 4 illuminator elements. The three sets of front illuminators  3829   a ,  3829   b , and  3829   c  are associated with the front looking viewing element of the endoscope and positioned to illuminate the field of view of the front looking viewing element. In one embodiment, sidewall  3827   b  of the circuit board  3827   a  is truncated in order to align with a corresponding sidewall design, wherein the sidewall of a tip cover is adapted to include a depression. 
       FIG.  38 Hb  illustrates one embodiment of a side illumination circuit board  3826   b  comprising a side panel  3827   c  approximating a “U” shape. The side panel  3827   c  is configured to carry two sets of side illuminators  3829   d ,  3829   e  wherein each set comprises a single illuminator element in accordance with an embodiment. In other embodiments, the side panel  3827   c  may be configured to carry two sets of side illuminators  3829   d ,  3829   e  wherein each set may further comprise 2, 3, or 4 illuminator elements. The side illuminators  3829   d ,  3829   e  are associated with the side looking viewing element of the endoscope and positioned to essentially illuminate the field of view of the side looking viewing element. In various embodiments, the side illuminators are positioned such that the distance between the center of side illuminator  3829   d  and the center of side illuminator  3829   e  is in a range of 5.5-6.5 mm. 
     As illustrated in  FIG.  38 I , the base board  3805  is configured to hold and support the illumination circuit boards  3826   a  and  3826   b  and their corresponding illuminators  3829   a  through  3829   e  in the desired configuration. The base board  3805  secures the front and side looking viewing elements  3832 ,  3833  in place to form an electronic circuit board assembly  400  of the present specification. Finally,  FIGS.  38 J through  38 K  illustrate an endoscope tip  3801  and a fluid channeling component  600  attached to the electronic circuit board assembly  400  of the present specification. Fluid channeling component  600  includes a front working/service channel  640  that is configured for insertion of a medical (such as a surgical) tool and for applying suction to tissue. According to some embodiments, there is provided herein an endoscope (such as, but not limited to, a gastroscope or colonoscope) that includes (in a tip section thereof), in addition to a front viewing element and one side viewing element, and in addition to a front working/service channel  640 , a front nozzle opening  3824  and a front jet opening  3826 . 
     The optical setup for endoscopes typically used in the prior art requires a relatively large overall optical length (total optical track) of the entire optical system, which is disadvantageous for endoscopes, in particular those used as colonoscopes and gastroscopes, particularly if used in endoscopes having side-viewing camera or cameras, such as endoscopes according to embodiments of the present specification. 
     In addition, in sensors (such as CCD sensors) used in endoscopes of the prior art, the pixels are partially covered by a photo-shielding film, so that the light energy is concentrated in the center of the pixel, where there is a “window” in the photo-shielding film. This improves the signal-to-noise ratio and increases the light utilization efficiency. However, this also causes the sensor to be sensitive to incident angles between the light rays which have passed the micro-lenses of the sensor and the optical axis of the system. Thus, light rays having relatively small incident angles may reach the pixel, while light rays having relatively large incident angles (between the light rays which have passed the micro-lenses of the sensor and the optical axis of the system) may not reach the “window” and thus the pixel, leading to significant energy losses. The losses are maximized at the edges of the field of view, i.e. for light rays having incident angles close to that of the chief ray. 
     There is thus provided herein, according to some embodiments, a lens system (assembly) configured for use in an endoscope, such as a colonoscope, particularly for use in a multi-sensor endoscope/colonoscope. The lens system, (optionally together with the sensor) according to some embodiments of the specification, has a short total optical length (track), for example, 5 mm or less. The lens system, according to some embodiments of the specification, is configured to provide a large incident angle, for example, a chief incident angle (for example the incident angles forming by rays R6 in  FIGS.  41 A through  41 C ) larger than 20°, larger than 25°, larger than 30° or between about 20-40°. The lens system, according to some embodiments of the specification, provides minimal distortion (for example, less than 80%). 
     According to some embodiments, the sensor which is used together with the lens system, is configured to have a window in the photo-shielding film configured to allow rays having large incident angle (for example, a chief incident angle larger than 20°, larger than 25°, larger than 30° or between about 20-40°) to reach the pixel and thus improve the distortion. According to some embodiments, the width of the window (or any other dimensional parameter) may be about 30-60% of the width of the corresponding pixel. According to some embodiments, the micro-lenses of the sensor may be configured to provide substantially aplanatic conditions. In other words, the sensor may be configured to provide an image substantially free of aberrations. 
       FIG.  39 A  schematically depicts a cross section of an endoscope  3900  having multiple fields of view showing some details of the head  3930  according to an exemplary embodiment of the current specification. 
     According to the current specification, head  3930  of endoscope  3900  comprises at least a forward looking camera  39116  and two side looking cameras  3920   a  and  3920   b . Each of cameras  39116  and  3920   a ,  3920   b  is provided with an optical imaging system such as lens assemblies (systems)  39132  and  3932  respectively and solid state detector arrays  39134  and  3934  respectively. Front camera elements  3936  and  3956  of cameras  39116  and  3920  respectively may be a flat protective window, but optionally an optical element used as part of the imaging systems such as solid state detector arrays  39134  and  3934  respectively. Optionally, cameras  39116  and  3920  are similar or identical, however different camera designs may be used, for example, field of views  39118  and  3918  may be different. Additionally or alternatively, other camera parameters such as, resolution, light sensitivity, pixel size and pixel number, focal length, focal distance and depth of field may be selected to be the same or different. 
     Light is provided by light emitting diodes (LED) that illuminates the fields of view. According to some embodiments, white light LEDs may be used. According to other embodiments, other colors of LEDs or any combination of LEDs may be used (for example, red, green, blue, infrared, and ultraviolet). 
     In the depicted embodiment, field of view  39118  of forward looking camera  39116  is illuminated by two LEDs  3940   a  and  3940   b  located within the endoscope head  3930  and protected by optical windows  3942   a  and  3942   b  respectively. 
     Similarly, in the depicted embodiment, fields of view of side looking cameras  3920   a  and  3920   b  are each illuminated by a single LED  3950  located within the endoscope head  3930  and each protected by optical window  3952 . It should be noted that number of LED light sources and their position in respect to the cameras may vary within the scope of the current specification. For example, few LEDs may be positioned behind the same protective window, a camera and an LED or plurality of LED may be located behind the same protective window, etc. 
     Head  3930  of endoscope  3900  is located at the distal end of a flexible shaft  3960 . Similar to shafts of the art, shaft  3960  comprises a working channel  3962  for insertion of surgical tools. Additionally, shaft  3960  may comprises channels for irrigation, insufflation, suction and supplying liquid for washing the colon wall. 
       FIG.  39 B  schematically depicts a cross section cutout of an endoscope showing some details of the head  3930  according to an exemplary embodiment of the current specification. For simplicity, details of one of the two side looking cameras are marked in the figure. 
     According to the current specification, head  3930  of the endoscope comprises at least one side looking camera  3920 . Each of cameras  3920  is provided with an optical imaging system such as lens assemblies  3932  and solid state detector arrays  3934 . Front camera element  3956  of camera  3920  may be a flat protective window or an optical element used as part of the imaging system  3932 . 
       FIG.  39 C  schematically depicts a cross section of an endoscope having multiple fields of view showing some details of the head  3930  according to an exemplary embodiment of the current specification. 
     According to some embodiments of the current specification, the interior of the head  3930  comprises forward looking and side looking cameras  39116  and  3920 , respectively. Cameras  39116  and/or  3920  comprise lens assemblies  39132  having a plurality of lenses  430  to  434  and protective glass  3936  and a solid state detector array  39134  connected to a printed circuit board  39135  and  3935 . It is noted that cameras  39116  and  3920  or any element related to them (such as lens assemblies  39132 , lenses  430  to  434  and protective glass  3936 , solid state detector array  39134  and/or printed circuit board  39135  and  3935 ) may be the same or different. In other words, the front looking camera and the side looking camera(s) may be the same or different in any one or any combinations of their components or other element related to them (such as optical elements). 
       FIG.  40    schematically depicts a cross section of cameras  39116  or  3920 , showing some details of lens assemblies  39132  and  3932  according to an exemplary embodiment of the current specification. It should be noted that according to some embodiments of the specification, cameras  39116  and  3920  may be similar or different. Optionally, the focusing distance of camera  39116  is slightly different than that of camera  3920 . Differences in focusing distances may be achieved, for example, by (slightly) changing the distance between the lenses that comprise the lens assemblies  39132  and/or  3932 , or between the lens assembly and the detector array. 
     Air gap “S” between lenses  431  and  432  acts as a stop. Air gap S may affect the focal range (the distance between the closest object and farther objects that can be imaged without excessive blurring caused by being out of optimal focusing of the lens system). 
     According to an exemplary embodiment of the current specification, cameras  39116  and  3920  comprise lens assemblies  39132  and  3932  respectively. The lens assemblies comprise a set of lenses  430  to  434  and protective glass  436 . 
     Lenses  430  to  434  are situated within a (optionally metallic) barrel  410  and connecter thereto (for example, glued in barrel  410 ). Any one of lens assemblies  39132  and/or  3932  may also include an adapter  411 , optionally, as shown in  FIG.  40   , positioned within barrel  410 . Adapter  411  is configured to adjust the location of one or more of the lenses and adjust the distance between lenses. Adapter  411  may also be configured to function as a stop (in this case, between lenses  432  and  433 . Protective glass  436  is situated in proximity to the solid state detector arrays  39134  or  3934  and is optionally attached thereto. 
     Focal distance (the distance to the object to be optimally focused by the lens system) may be changed by changing the distance between lenses  434  and protective glass  436 . As lens  434  is fixed to the barrel  410 , and protective glass  436  is fixed to lens holder  39136  ( 3936 ), this distance may be varied by changing the relative positioning of lens holder  39136  ( 3936 ) with respect to barrel  410 . The space between the lenses  434  and protective glass  436  may be an empty space or may be filled with glass or other transparent material, or a tubular spacer may be inserted to guarantee the correct distance between these lenses. Optionally, optical filters may be placed within the space. Cameras  39116  and  3920  further comprise solid state detector arrays  39134  and  3934  respectively. Solid state detector arrays  39134  and  3934  may each be connected to printed circuit boards. An electrical cabling may connect the printed boards to a central control system unit of the endoscope. 
     Solid state detector arrays  39134  and  3934  are attached to lens holders  39136  and  3936  respectively. Lens holder  39136  or  3936  is attached to lens assemblies  39132  or  3932  respectively by attaching detector array cover to barrel  410 . 
     In some applications, protective glass  436  may be a flat-flat optical element, acting primarily as a protection of the detector array (such as detector arrays  39134  and  3934 ), and may optionally be supplied with the array. However, optical properties of protective glass  436  need to be accounted for in the optical design. 
     In order to assemble lens assemblies  39132  or  3932 , lens  430  may first be inserted from the left, then  431 , and  432  from the right. Lenses  433  and  434  which may be glued together (or separated for example by air) are then inserted from right. The complete set is now assembled in a barrel. The assembled detector (such as detector arrays  39134  and  3934 ), protective glass  436  and cover  39136  ( 3936 ) are then added. 
       FIGS.  41   a ,  41   b  and  41   c    illustrate three examples for the lens assemblies such as lens assemblies  39132  and  3932  according to the present specification, having objective lens systems  510 ,  520  and  530  respectively. The sensor used in the lens assemblies  39132  and  3932 , according to this exemplary embodiment, may be a Charge Coupled Device sensor (CCD) having an array of micro-lenses but other sensors, such as CMOS, may also be used. 
     In an exemplary embodiment of the specification, a color CCD camera having resolution of approximately 800×600 pixels is used with total active area of approximately 3.3×2.95 mm. The optical resolution of the lens, according to exemplary embodiments of the current specification, is designed to match the resolution of the sensor. The objective lens systems  510  ( 520 / 530 ) are preferably corrected for chromatic, spherical and astigmatism aberrations. In an exemplary embodiment of the specification, objective lens systems  510 ,  520 ,  530  are approximately 4.60 mm (4.62) in total length, measured from front face of front lens to the front surface of the sensor. In an exemplary embodiment of the specification, objective lens systems  510  and  520  are wide angle objectives having approximately 170 degrees acceptance angle. In an exemplary embodiment of the specification, objective lens systems  510 ,  520 ,  530  have a short focal distance of measured from the front surface of the front lens to the imaged object. In an exemplary embodiment of the specification objective lens systems  510 ,  520 ,  530  have depth of focus (DOF) allowing to effectively image objects between 4-110 mm (or between, 3.5-50 mm). In an exemplary embodiment of the specification, objective lens systems  510 ,  520  and  530  have a maximum diameter of about 2.5 mm, defined by the diameter of the front lens, and are housed in a barrel having a maximum outer diameter of approximately 3.6 mm. It should be noted that other design parameters may be selected within the general scope of the current specification. 
     The objective lens systems  510 ,  520 ,  530  have an optical axis “0” depicted by the dashed line. The lens systems each comprise a front sub-system  510   a ,  520   a ,  530   a  and a rear sub-system  510   b ,  520   b ,  530   b.    
     Front sub-systems  510   a  and  520   a  of  FIGS.  41 A and  41 B  each comprise a front lens  430 ,  430 ′ located closest to the object to be viewed, having a negative power and lens  431 ,  431 ′ having a positive power. 
     Front lens  430 ,  430 ′ is oriented with its concave surface facing the object to be viewed and optionally has a diameter substantially greater than the largest dimension of the rear sub-system  510   b ,  520   b  in the direction perpendicular to the optical axis. Lens  431 ,  431 ′ has a positive power. 
     Rear sub-systems  510   b ,  520   b  comprise lenses  432 ,  433 ,  434  and protective glass  436  and lenses  432 ′,  433 ′,  434 ′, and protective glass  436 ′ respectively, wherein  432  and  432 ′ have a negative power,  433  and  433 ′ have a positive power,  434  and  434 ′ have a negative power, and  436  and  436 ′ have essentially no optic power. It is noted that protective glass  436  and  436 ′ may be a part of the sensor or a part of the rear sub-system  510   b ,  520   b . Lenses  433  and  434 , and  433 ′ and  434 ′, of the rear sub-systems  510   b  and  520   b  respectively, compose an achromatic sub-assembly (a compound achromatic sub-assembly as seen in  FIG.  41 A , where lenses  433  and  434  are cemented or non-compound achromatic sub-assembly as seen in  FIG.  41 B , where lens  433 ′ and lens  434 ′ are separated). Lens  433  and  433 ′ may be biconvex with radius of curvature of its front surface being smaller than radius of curvature of its rear surface, as indicated in Tables T1 and T2 below. 
     Lens  432  of the objective lens systems  510  may have a focal length f432 satisfying the following condition: f432≤1.8f, where f is the composite focal length of the total system. Particularly, for the data indicated in Table T1, f432=2.05 and f=1.234 mm, the condition: f432≤1.8f is satisfied. 
     Lens  432 ′ of the objective lens systems  520  may have a focal length f432′ satisfying the following condition: f432≤1.8f. 
     Particularly, for the data indicated in Table T2, f432=2.05 and f=1.15 mm, the condition: f432≤1.8f is satisfied. 
     The lenses may be coated with an anti-reflection coating (AR coating) for further improving the efficiency of the lens assemblies  39132 ,  232 . 
     An effective aperture stop S1, S2 is formed between lenses  431  and  432 ,  431 ′ and  432 ′. Effective aperture stop S1, S2 may separate between front sub-system  510   a ,  520   a ) and rear sub-system  510   b ,  520   b.    
     Front sub-system  530   a , seen in  FIG.  41 C , comprises a front lens  430 ″ located closest to the object to be viewed, having a negative power and lens  431 ″, having a positive power. Front sub-system  530   a  further comprises an additional front positive lens (such as the meniscus lens  429 ) disposed between the first front negative lens  430 ″ and the second front positive lens  431 ″. 
     Front lens  430 ″ is oriented with its concave surface facing the object to be viewed and optionally having a diameter substantially greater than the largest dimension of the rear sub-system  530   b  in the direction perpendicular to the optical axis. 
     Rear sub-system  530   b  comprises lenses  432 ″,  433 ″,  434 ″, and protective glass  436 ″, wherein  432 ″ has a negative power,  433 ″ has a positive power,  434 ″ has a negative power, and  436 ″ has essentially no optic power. It is noted that protective glass  436 ″ may be a part of the sensor or a part of the rear sub-system  530   b . Lenses  433 ″ and  434 ″ compose an achromatic sub-assembly of the rear sub-system  530   b  and may or may not be cemented to each other. Lens  433 ″ may be biconvex with radius of curvature of its front surface being smaller than radius of curvature of its rear surface, as indicated in Table T3 below. 
     Lens  432 ″ of the objective lens systems  530  may have a focal length f432 satisfying the following condition: f432″≤1.8f, where f is the composite focal length of the total system. Particularly, for the data indicated in Table T3 f432″=2.26 and f=1.06 mm, the condition: f432″≤1.8f is satisfied. 
     The lenses may be coated with an anti-reflection coating (AR coating) for further improving the efficiency of the lens assemblies  39132 ,  3932 . 
     An effective aperture stop S3 is formed between lenses  431 ″ and  432 ″. Effective aperture stop S3 may separate between front sub-system  530   a  and rear sub-system  530   b.    
     Tables T1, T2 and T3 summarize the parameters of lenses in the objective lens systems  510 ,  520  and  530 , respectively, according to some embodiments of the current specification: 
     
       
         
           
               
             
               
                 TABLE T1 
               
             
            
               
                   
               
               
                 (FOV = 164o, DOF = 3-110 mm. f = 1.234 mm, total optical track 4.09 mm) 
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                   
                   
                 Semi- 
                 Semi- 
                   
               
               
                   
                   
                   
                   
                   
                   
                   
                 Diameter 
                 Diameter 
                   
               
               
                 Lens 
                 Type 
                 R 1   
                 R 2   
                 Th 
                 D 
                 Glass 
                 d 1 /2 
                 d 2 /2 
                 f  mm   
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 430 
                 Negative 
                 15 
                 0.7 
                 0.2 
                 0.18 
                 N-LASF31 
                 1.2 
                 0.64 
                 −0.837 
               
               
                 431 
                 Plan-convex 
                 0.9 
                 Infinity 
                 0.56 
                 0.27 
                 N-LASF31 
                 0.8 
                 0.8 
                 1.02 
               
               
                 S 1   
                 Stop 
                   
                   
                   
                 0.05 
                   
                 0.104 
                   
                   
               
               
                 432 
                 Plan-convex 
                 Infinity 
                 −1.0 
                 0.75 
                 0.09 
                 FK5 
                 0.8 
                 0.8 
                 2.05 
               
               
                 433 
                 Biconvex 
                 1.93 
                 −4.2 
                 0.75 
                 0.005 
                 N-LAK22 
                 1.1 
                 1.1 
                 2.13 
               
               
                 434 
                 Biconcave 
                 −4.2 
                 4.44 
                 0.3 
                 0.65 
                 N-SF66 
                 1.1 
                 1.2 
                 −2.3 
               
               
                 436 
                 Protection Glass 
                 Infinity 
                 Infinity 
                 0.3 
                 0 
                 N-BK7 
                 1.5 
                 1.5 
                 Infinity 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE T2 
               
             
            
               
                   
               
               
                 (FOV = 164o, DOF = 3-110 mm, f = 1.15 mm, total optical track 4.09 mm) 
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                   
                   
                 Semi- 
                 Semi- 
                   
               
               
                   
                   
                   
                   
                   
                   
                   
                 Diameter 
                 Diameter 
                   
               
               
                 Lens 
                 Type 
                 R 1   
                 R 2   
                 Th 
                 D 
                 Glass 
                 d 1 /2 
                 d 2 /2 
                 f  mm   
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 430 
                 Negative 
                 6 
                 0.7 
                 0.2 
                 0.3 
                 N-LASF31 
                 1.2 
                 0.66 
                 −0.913 
               
               
                 431 
                 Plan-convex 
                 1.26 
                 Infinity 
                 0.50 
                 0.27 
                 N-LASF31 
                 0.8 
                 0.8 
                 1.43 
               
               
                 S 1   
                 Stop 
                   
                   
                   
                 0.05 
                   
                 0.105 
                   
                   
               
               
                 432 
                 Plan-convex 
                 Infinity 
                 −1.0 
                 0.60 
                 0.15 
                 FK5 
                 0.8 
                 0.8 
                 2.05 
               
               
                 433 
                 Biconvex 
                 1.67 
                 −1.65 
                 0.70 
                 0.30 
                 FK5 
                 0.95 
                 0.95 
                 1.83 
               
               
                 434 
                 Meniscus 
                 −1.33 
                 −12.0 
                 0.35 
                 0.40 
                 N-SF66 
                 1.0 
                 1.2 
                 −1.65 
               
               
                 436 
                 Protection Glass 
                 Infinity 
                 Infinity 
                 0.3 
                 0 
                 N-BK7 
                 1.5 
                 1.5 
                 Infinity 
               
               
                   
               
            
           
         
       
     
     Table T3 shows an example of a six-component system also comprising an additional positive lens  429  (for example, as indicated in Table T3, a meniscus lens). 
                     TABLE T3                  (FOV = 164o, DOF = 3-110 mm, f = 1.06 mm, total optical track 4.69 mm)                                                                                 Semi-   Semi-                                       Diameter   Diameter           Lens   Type   R 1     R 2     Th   D   Glass   d 1 /2   d 2 /2   f  mm                                                               430″   Negative   4.3   0.75   0.2   0.22   N-LASF31   1.3   0.72   −1.06       429   Meniscus   0.95   0.9   0.44   0.18   N-SF66   0.8   0.65   5.75       431″   Plan-convex   2.0   Infinity   0.75   0.02   N-LASF31   0.8   0.8   2.26       S 3     Stop               0.02       0.116               432″   Plan-convex   Infinity   −1.0   0.78   0   N-PSK57   0.8   0.8   1.69       433″   Biconvex   2.52   −2.0   0.50   0.154   YGH52   0.8   0.8   1.49       434″   Biconcav   −1.44   11.0   0.25   0.91   PBH56   0.8   0.9   −1.50       436″   Protection Glass   Infinity   Infinity   0.3   0   N-BK7   1.5   1.5   Infinity                    
R1—radius of curvature of the lens front surface (front surface is the surface facing the direction of the object);
 
R2—radius of curvature of the lens rear surface (facing away from the object);
 
Th—thickness of the lens—from center of front surface to center of rear surface; Glass—lens glass type;
 
d1—radius of the front optical surface of the lens;
 
d2—radius of the rear optical surface of the lens;
 
D—distance between components such as lenses, measured front center of rear surface of the component, such as lens to the front surface of the next optical element (in the case of a stop, S, the distance is measured front center of rear surface of a component on the front side of the stop, to the front surface of the next component),
 
     As commonly used, radius of curvature equal to infinity is interpreted as planar. All lenses are optionally spherical. 
       FIGS.  41 A,  41 B and  41 C  also show the propagation of six incident rays of light R1 to R6 through the objective lens system  510 ,  520  and  530  respectively, from the front lens  430  ( FIG.  41   a   ),  430 ′ ( FIG.  41   b   ) or  430 ″ ( FIG.  41   c   ) till the creating of an image of the object at an image plane. 
     Rays R1 to R6 enter the lens assembly at angles α1 (alpha 1) to α6 (alpha 6), respectively, for example, essentially equal to the following angles: α1=0°, α2=45°, α3=60°, α4=75° and α5=84°. The corresponding incident angles (the angles between the light rays which have passed the micro-lenses of the sensor and the optical axis of the system) are β1 (beta 1)-β6 (beta 6). According to some embodiments, the chief incident angle (for example the incident angles forming by rays R6 in  FIGS.  41 A through  41 C ) is larger than 20°, larger than 25°, larger than 30° or between about 20-40°. The lens system, according to some embodiments of the specification provides minimal peripheral distortion (for example, less than 80%). 
     The optical system assembly  39132 ,  3932  may be assembled by a method comprising the steps of: 
     Optionally, cementing the rear doublet of lenses  433 - 434  ( 433 ′- 434 ′); 
     and: 
     Assembling in the barrel the front lenses  430  ( 430 ′); 
     Assembling lens  431  ( 431 ′) in the barrel; 
     Assembling lens  432  ( 432 ′) in the barrel; and 
     Assembling in the barrel, the rear doublet  433 - 434  ( 433 ′- 434 ′); optionally, 
     Note that front lens  430  ( 430 ′) may be assembled last. 
     In one embodiment, each of the multiple viewing elements of a tip section of an endoscope is embodied as a separate imaging module. The imaging modules are encapsulated together in the endoscopic tip cavity. The modules are individually sealed such that in case of failure in one module, only the failed module is replaced without affecting the other modules. 
     In a modular design, each of the front and side-pointing image sensors and their respective lens assemblies, together with their circuit boards, comprise individual imaging modules, which are described in greater detail with reference to the figures below. In case of a defect, these modules can be individually replaced or repaired without affecting the other modules. In one embodiment, all the imaging modules are advantageously positioned relatively close to the distal end surface of the tip section. This is enabled by an advantageous miniaturizing of the front and side-pointing viewing elements in modular design, which allows for enough internal space in the tip section for angular positioning of the cameras without colliding. 
     Further, the modular design makes use of the same space or volume for imaging modules, as used by cameras in existing designs, and does not affect the functionality and design of other components in the tip such as fluid channels, illuminators, etc. 
     Reference is now made to  FIG.  42   , which shows various components of a modular endoscopic tip, according to one embodiment of the present specification. A modular tip housing comprises a front tip cover  4201  and a rear tip cover  4202 . A fluid channeling component  4203  is designed to fit between the two tip covers. Both front tip cover  4201  and rear tip cover  4202  have optical windows  4204  for the purpose of covering, protecting and sealing the viewing elements and the illuminators within the tip. 
     The endoscope tip housing also has a designed holder  4205  in which imaging module units  4206  together with their electrical cable  4207  can be placed. The holder  4205  has appropriate slots  4208  to fit in the imaging module units. It also has a portion  4209  for carrying the associated electrical cable. A flexible electronic circuit board  4210  is also provided which is configured to carry the imaging modules, which comprise imaging elements as well as optics. The flexible electronic circuit board has been described earlier in this specification. Particularly, as described earlier, the flexible circuit board consumes less space and leaves more volume for additional necessary features. In one embodiment, the flexible circuit board can be folded to allow two side imaging modules to be positioned parallel to each other. Thus, the flexibility of the board adds another dimension in space that can be used for components positioning. 
     The use of the circuit board can significantly increase reliability of the electric modules connected thereto as no wires are used for components connectivity. In addition, according to some embodiments, the components assembly can be machined and automatic. 
     The use of the circuit board assists in maneuverability of components during assembly of the modular tip and also simplifies the assembly process. In one embodiment, the flexible circuit board is connected to the control unit of the endoscope via a multi-wire electrical cable which is welded on the board in a designated location, thereby freeing additional space within the tip assembly. 
       FIG.  43    provides a detailed view of the holder  4300  (shown as  605  in  FIG.  42   ) for housing the imaging modules. Referring to  FIG.  43   , holder  4300  comprises a concave area  4301  in the front, where the front-pointing imaging module can be placed. The holder further comprises two compartments  4302  and  4303  for carrying the first and the second side-pointing imaging modules, respectively. The compartments are also provided with circular slots  4304  and  4305  to carry the optics of the imaging modules. A rectangular strip  4306  in the holder is provided to carry the electrical cable. It may be appreciated that the holder is designed such that it corresponds to the shape and size of modular imaging units together with the electrical cable. This can also be seen in elements  4205 ,  4206  and  4207  of  FIG.  42    as described above. 
       FIG.  44    illustrates a top view of the modular imaging units when integrated with one another. In the present embodiment, three modular imaging units are employed, in a similar configuration as described with reference to  FIG.  1 J . Referring to  FIG.  44   , among the three modular imaging units, there is a front-pointing modular unit  4410  and two side-pointing modular imaging units  4420  and  4430 . The front-pointing modular unit  4410  comprises a front printed circuit board with integrated sensor  4401 . Front-pointing modular unit  4410  further comprises a front lens holder  4402  within which the optics of the imaging unit are placed. The first-side pointing modular unit  4420  comprises a side printed circuit board with integrated sensor  4403 . It further comprises a side lens holder  4404  where the optics of the imaging unit are placed. The other side-pointing modular imaging unit  4430  also comprises a side printed circuit board with integrated sensor  4405 , together with a side lens holder  4407 . All the modular units are supplied power through the electrical cable  4406 . 
       FIG.  45    illustrates a bottom view of the three modular imaging units, including one front-pointing imaging unit  4510  and two side-pointing units  4520  and  4530 . Here, the side printed circuit boards with integrated sensors  4501 ,  4502  are visible for both the side-pointing modular units  4520  and  4530 . Also visible are the side lens holders  4503 ,  4504 , and the front printed circuit board with integrated sensor  4505  and the front lens holder  4506  of the front-pointing modular imaging unit  4510 . As can be seen from the figure, the electrical cable  4507  is connected to the printed circuit boards  4505 ,  4501 , and  4502  of the front-pointing as well as the side pointing imaging units, respectively. 
     As described earlier with reference to  FIG.  1 J , in various embodiments, each imaging module comprises a lens assembly, an image capturing device and an integrated circuit board. Image capturing devices may be Charged Coupled Devices (CCD&#39;s) or Complementary Metal Oxide Semiconductor (CMOS) image sensors, or other suitable devices having a light sensitive surface usable for capturing an image. 
     In operation, each camera may capture images, substantially independently, and the images may be displayed, substantially simultaneously, using one or more displays e.g. as described in PCT/IL10/000476, which is incorporated herein by reference. 
       FIG.  46    illustrates a perspective view of a side-pointing modular imaging unit. Referring to  FIG.  46   , the side-pointing modular imaging unit  1000  comprises a viewing element  1001  in the front. The viewing element may comprise an optic array camera. The imaging module further comprises sensor such as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor and a lens holder  1002  for carrying the optics of the imaging system. The printed circuit board  1003  is used to supply power to and derive images from the image sensor. In one embodiment, the image sensor is integrated with the printed circuit board. The optics of the image system may include a plurality of lenses, static or movable, which may provide a field of view of at least 90 degrees and up to essentially 180 degrees. In one embodiment, the lens assembly provides a focal length of about 2 to 100 millimeters. Side-pointing image sensor  1001  and optics (contained in the lens holder  1002 ), together with integrated circuit board  1003 , may be jointly referred to as a “side-pointing imaging module”. 
       FIG.  47    illustrates a perspective view of a front-pointing modular imaging unit. Referring to  FIG.  47   , the front-pointing modular imaging unit  1100  comprises a viewing element  1101  in the front. The viewing element may comprise an optic array. The imaging module further comprises sensor such as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor and a lens holder  1102  for optical imaging system. The printed circuit board  1103  is used to supply power to and derive images from the image sensor. The optics of the image system may include a plurality of lenses, static or movable, which may provide a field of view of at least 90 degrees and up to essentially 180 degrees. In one embodiment, the lens assembly provides a focal length of about 3 to 100 millimeters. Front-pointing image sensor  1101  and optics (contained in the lens holder  1102 ), together with integrated circuit board  1103 , may be jointly referred to as a “front-pointing imaging module”. 
     It may be noted that the front and side-pointing image sensors may be similar or identical in terms of, for example, field of view, resolution, light sensitivity, pixel size, focal length, focal distance and/or the like. 
       FIG.  48    illustrates the modular nature of the various elements in the endoscopic tip, according to one embodiment of the present specification. Referring to  FIG.  48   , front-pointing imaging module  1201 , side-pointing imaging modules  1202  and  1203 , and the electric cable  1204  are all individual units. These units can be housed in the endoscopic tip using the modular holder  1205 . The holder allows all the modular units to function together and yet be separate, such that each unit can be individually removed from the assembly. Similarly, modular units can be individually installed into the tip assemble. This allows individual units to be repaired or replaced without affecting the other parts in the endoscopic tip. 
       FIG.  49    illustrates the front-pointing imaging module  1301  assembled with the side-pointing imaging modules  1302  and  1303 . The circuit boards  1304  of all the imaging modules are coupled to each other and connected with the electrical cable  1305 .  FIG.  49    also shows the modular holder  1306  which has compartments  1307  for each imaging unit. The compartments enable the imaging modules to be encapsulated from each other, and therefore removal of one imaging module does not damage or affect the other modules. 
       FIG.  50    illustrates a perspective view of the assembled components, wherein the modular holder  1401  carries the modular imaging units  1402  and the electrical cable  1403 . 
       FIG.  51    illustrates another embodiment of the modular endoscopic tip. Referring to  FIG.  51   , the endoscope tip comprises a front tip cover  1501  and a rear tip cover  1502 . A fluid channeling component  1503  is designed to fit between the two tip covers. 
     In this embodiment, a mechanism for coupling the modular imaging units is integrated with the imaging units themselves. This mechanism, referred to as image modular holder  1504  is used to connect the modular imaging units  1505 . The overall structure (comprising all three modular units) is then supported by a frame  1506 , known as the modular supporter. 
       FIG.  54    illustrates a detailed view of the modular holder  1801 . The modular holder comprises recesses  1802  into which corresponding connectors of imaging units are designed to fit. These connectors are shown and described further with reference to  FIGS.  52 ,  53 A and  53 B . The recesses  1802  that correspond to the imaging module connectors allow the modules to be physically coupled to each other and to the endoscope tip. Further, the recesses also enable the flow of power and data between the endoscope and the imaging modules. Modular holder comprises recesses  1802  also has a portion  1803  for carrying the associated electrical cable. 
       FIG.  52    illustrates a detailed view of the coupling mechanism and the modular holder. Referring to  FIG.  52   , the lens holders  1601 ,  1602  and  1603  of each imaging unit are provided with protruding connectors  1604  that are designed to fit into corresponding recesses or slots  1605  in the modular holder  1606 . Once connected using the connectors, the modular imaging units are held by the supporter frame  1607 . In one embodiment, the electric cable may be connected to modular holder  1606  in the far end relative to lens holder  1601 . 
       FIGS.  53 A and  53 B  provide perspective views of the connecting mechanism between the imaging modules. Referring to both the figures, the modular holder  1701  has slots or recesses  1702  on all three sides  1703 ,  1704 , and  1705  where corresponding connectors  1706  of the three lens holders  1707 ,  1708  and  1709  can fit in. 
     A person of ordinary skill in the art would appreciate that the connector mechanism as shown in  FIGS.  52  and  53 A , B further simplifies the process of assembling or removing an individual imaging module from the endoscope tip. 
     It may be noted that in the embodiment shown in  FIGS.  42  through  50   , the components can be assembled by soldering the flexible printed circuit boards of imaging modules at the rear part of the tip and connecting them with the electrical cable. Another embodiment is shown in  FIGS.  51  through  54   , wherein connectors are provided to connect between the flexible PCBs of imaging modules. 
     In one embodiment (not shown), each imaging module is connected through a different cable to ease the replacement of each imaging module. 
     In one embodiment, the imaging modules are a part of removable tip. In this case, an endoscope comprises an elongated shaft terminating with a tip section, wherein said tip section comprises a permanent section connected to the elongated shaft and a removable section securely connectable to the permanent section. The removable section comprises imaging modules and at least one light source. 
     It should be appreciated that the main idea is to use the same space and volume for modular units, as used by the viewing elements in existing tip configurations. The modular design does not affect the design or functioning of other components in the tip, such as fluid channels or illuminators. 
     Reference is now made to  FIG.  55 A , which schematically depicts an isometric view of a tip section of an endoscope (including an electronic circuit board carrying cameras and illumination sources, and a fluid channeling component), having a multi component tip cover (shown in an exploded view), according to an exemplary embodiment of the current specification and to  FIG.  55 B , which schematically depicts an isometric view of the tip section of  FIG.  55 A , having an assembled multi-component tip cover, according to some exemplary embodiments of the current specification. 
     Tip section  5500  generally includes an inner part  5510  which includes electronics (such as cameras, a circuit board such as electronic circuit board  400 , illumination sources, such as LEDs etc.), fluid channels (such as fluid channeling component  600 ) and a multi-element tip cover  300 . Multi-element tip cover  300  is designed to fit over the inner parts of the tip section  5500 , and to provide protection to the internal components in the inner part. Multi-element tip cover  300  includes, according to this embodiment, three parts: a front component  710  configured to cover a front part of the tip section; a right side component  730  configured to cover a right side part of the tip section; and a left side component  5550  configured to cover a left side part of the tip section, wherein the front, right side and left side components are configured to abut each other to cover the tip section, in such way that they cover essentially all inner parts of the tip section. 
     Front component  710  includes hole  736  configured to align with (and accommodate) front optical assembly  236  of forward looking camera  116 ; optical windows  242   a ,  242   b  and  242   c  of LEDs  240   a ,  240   b  and  240   c ; distal opening  340  of a working channel; distal opening  344  of a jet fluid channel  644 ; and irrigation and insufflation (I/I) injector  346  having a nozzle  348  (aligning with opening  664  of fluid channeling component  600 ). 
     Left side component  5550  includes hole  756   b  configured to align with (and accommodate) side optical assembly  256   b  of side looking cameras  220   b ; optical windows  252   a  and  252   b  of LEDs  250   a  and  250   b  on both sides of optical assembly  256   b ; side I/I injector  266   b  adapted to align with side I/I opening  666   b  of fluid component  600 . Also seen in  FIGS.  55 A and  55 B  are nozzles  267   b  and a for side I/I injector  266   b  and a side I/I injector on the opposite side, respectively. 
     Right side component  730  includes similar elements as left side component  5550 . 
     Left side component  5550  and right side component  730  are each in a shape of essentially half a cylinder (without top and bottom). 
     Front component  710  has essentially a cup shape having two opposing arms  712  and  714  extending perpendicularly to the cup bottom (which may also be referred to as the cup&#39;s front face) and protruding from the cup edges. Upon assembling of the tip cover components, front component  710  may be installed first, and then the side components such that their long edges meet each other on both sides over arms  712  and  714  to assure sealing ( FIG.  55 B ). Adhesives, such as glue, may be added, for example, in cavities  716  (along the external parts of the edges of component  710 ),  718  (along the internal edges of component  730 ) and  5520  (along the internal edges of component  5550 ) to allow complete sealing of tip section  5500 . 
     Multi-element tip covers according to embodiments of the specification, such as multi-element tip cover  300  or any other multi-element tip cover as disclosed herein, solve a significant problem that exists in the art when attempts are made to pack all necessary components into the small inner volume of an endoscope tip and to cover and seal these components. Regular cup shaped tip covers are used for standard tips having just one front camera. However, when standard cup shaped tip covers are used to cover the multi-camera tip, protruding inner tip elements, such as lenses or other parts of the side optical assemblies, are often damaged during the sliding of the cover over them. Using a multi-element tip cover may solve this problem. In addition, a multi-element tip cover assists in aiming its holes/openings/windows exactly at their right place over the corresponding tip inner elements. This is almost impossible using a unitary piece cover. Moreover, separately sealing each one of the elements of the multi-element tip cover improves the overall sealing of the tip due to better access to each element (for example an optical window) compared to the limited access of the same element in a unitary piece cover, such as a cup shaped cover. Separately sealing (and optionally checking for satisfactory sealing) of each one of the elements of the multi-element tip cover may be performed prior to assembling of the cover. This may also improve the sealing of the tip. 
     Tip section  5500  may include front optical assembly  236  of forward looking camera  116 . Optical axis of forward looking camera  116  is substantially directed along the long dimension of the endoscope. However, since forward looking camera  116  is typically a wide angle camera, its FOV may include viewing directions at large angles to its optical axis. It should be noted that number of illumination sources such as LEDs used for illumination of the FOV may vary (for example, 1-5 LEDs may be used on a front face of tip section  5500 ). Distal opening  340  of a working channel is also located on the front face of tip section  5500 , such that a surgical tool inserted through working channel tube, and through the working channel in the endoscope&#39;s tip section  5500  and deployed beyond the front face may be viewed by forward looking camera  116 . 
     Distal opening  344  of a jet fluid channel is also located on the front face of tip section  5500 . Distal opening  344  of a jet fluid channel may be used for providing a high pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity. 
     Also located on the front face of tip section  5500  is an irrigation and insufflation (I/I) injector  346  having a nozzle  348  aimed at front optical assembly  236 . I/I injector  346  may be used for injecting fluid (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  236  of forward looking camera. Optionally, the same injector is used for cleaning front optical assembly  236  and one, two or all of optical windows  242   a ,  242   b  and  242   c . I/I injector  346  may be fed by fluid such as water and/or gas which may be used for cleaning and/or inflating a body cavity. 
     Visible on a left side of tip section  5500  is the side camera (side looking camera) element  256   b  of side looking camera  220   b  and optical windows  252   a  and  252   b  of LEDs  250   a  and  250   b  for camera  220   b . A second side looking camera is positioned on the right side of the tip section  5500  and can be similar to camera  220   b . Optical axis of the right side looking camera is substantially directed perpendicular to the long dimension of the endoscope. Optical axis of left side looking camera  220   b  is substantially directed perpendicular to the long dimension of the endoscope. However, since the right side looking camera and left side looking camera  220   b  re typically wide angle cameras, their fields of view may include viewing directions at large angles to their optical axes. 
     Side I/I injector  266   b  having a nozzle  267   b  aimed at side optical assembly  256   b  may be used for injecting fluid to wash contaminants such as blood, feces and other debris from side optical assembly  256   b  of side looking camera. The fluid may include gas which may be used for inflating a body cavity. Optionally, the same injector is used for cleaning both side optical assembly  256   b  and optical windows  252   a  and/or  252   b . It is noted that according to some embodiments, the tip may include more than one window and LEDs, on the side and more than one window and LEDs in the front (for example, 1-5 windows and two LEDs on the side). Similar configurations of I/I injector and nozzle exists for cleaning right side optical assembly and optical windows located on the other side of tip  5500 . The I/I injectors are configured to clean all or a part of these windows/LEDs. I/I injectors  346  and  266   b  may be fed from same channel. 
     It is noted that the side wall  362  has a form of an essentially flat surface which assists in directing the cleaning fluid injected from left side I/I injector  266   b  towards side optical assembly  256   b  and optical windows  252   a  and/or  252   b . A right side wall on the other side of the cover is also essentially flat. Lack of such a flat surface may result in dripping of the cleaning fluid along the curved surface of tip section  5500  of the endoscope without performing the desired cleaning action. 
     It should be noted that while only one side looking camera is seen in  FIGS.  55 A and  55 B , preferably at least two side looking cameras may be located within tip section  5500 . When two side looking cameras are used, the side looking cameras are preferably installed such that their field of views are substantially opposing. However, different configurations and numbers of side looking cameras are possible within the general scope of the current specification. 
     According to some embodiments, the circuit board used for carrying electronic components such as cameras and/or LEDs may be a flexible circuit board that may consume less space and leaves more volume for additional necessary features. The flexibility of the board adds another dimension in space that can be used for components positioning. 
     The use of a flexible circuit board according to embodiments of the specification can significantly increase reliability of the electric modules connection thereto as no wires are for components connectivity. In addition, according to some embodiments, the components assembly can be machined and automatic. 
     The use of a flexible circuit board according to embodiments of the specification, may also allow components (parts) movement and maneuverability during assembly of the camera head (tip of the endoscope) while maintaining a high level of reliability. The use of the circuit board according to embodiments of the specification may also simplify the (tip) assembling process. 
     According to some embodiments, a flexible circuit board may be connected to the main control unit via a multi-wire cable. This cable may be welded on the board in a designated location freeing additional space within the tip assembly and adding flexibility to cable access. Assembling the multi-wire cable directly to the electrical components was a major challenge which is mitigated by the use of the flexible board according to embodiments of the specification. 
     Reference is now made to  FIG.  56   , which schematically depicts an isometric view of a tip section of an endoscope (including an electronic circuit board carrying cameras and illumination sources, and a fluid channeling component), having a multi component tip cover (shown in an exploded view), according to an exemplary embodiment of the current specification. Tip section  200  generally includes an inner part  5610  which may be similar to inner part  5510  of tip section  5500  of  FIGS.  55 A,  55 B  and a multi-element tip cover  300 . Multi-element tip cover  300  is designed to fit over the inner parts of the tip section  200 , and to provide protection to the internal components in the inner part. Multi-element tip cover  300  includes, according to this embodiment, a main component  830 , configured to cover the majority of the tip section, and a removable window component  850  configured to cover a window opening  860  located on main component  830 , such that removable window component  850  is configured to allow access to an inner part  5610  of tip section  200  without removing main component  830 . This may allow fixing or replacing one of the components of inner part  5610  (such as a LED, an optical element or any other element) without removing main component  830  and damaging the packing and sealing of tip section  200 . 
     Main component  830  has essentially a cup shape having a front face part configured to cover the front face of tip section  200  and cup edges configured to cover the side surface of tip section  200 . 
     Main component  830  may further include front and side holes, openings, windows and surfaces similar to those of multi-component cover  300  of  FIGS.  55 A,  55 B . 
     Reference is now made to  FIG.  57   , which schematically depicts an exploded view of a multi-component tip cover, according to an exemplary embodiment of the current specification. Multi-element tip cover  5700  is designed to fit over the inner part of a tip section and to provide protection to the internal components in the inner part. Multi-element tip cover  5700  includes, according to this embodiment, a front-side component  5730  configured to cover a front part and a side part of the tip section and a side component  5750  configured to cover another side part of the tip section, wherein front-side component  5730  and side component  5750  are configured to abut to cover the tip section. 
     Reference is now made to  FIGS.  58 A through  58 C .  FIG.  58 A  schematically depicts an isometric view of a tip section of an endoscope (including an electronic circuit board carrying cameras and illumination sources, an electronic circuit board holder, a fluid channeling component), having a multi-component tip cover (shown in an exploded view), according to an exemplary embodiment of the current specification.  FIG.  58 B  schematically depicts an isometric view of the tip section of  FIG.  58 A , having a multi-component tip cover (partially in an exploded view), according to an exemplary embodiment of the current specification.  FIG.  58 C  schematically depicts an assembled isometric view of the tip section of  FIGS.  58 A and  58 B  having a multi-component tip cover, according to an exemplary embodiment of the current specification. 
     Tip section  5800  generally includes an inner part  5810  which includes electronics (such as cameras, circuit board, LEDs etc.), fluid channels (such as fluid channeling component  1600 ) and a multi-element tip cover  1010 . Multi-element tip cover  1010  is designed to fit over the inner parts of the tip section  5800 , and to provide protection to the internal components in the inner part. Multi-element tip cover  1010  includes, according to this embodiment, two parts: a distal component  1050  configured to cover a distal part of the tip section and a proximal component  1030  configured to cover a proximal part of the tip section, wherein the distal component and the proximal component are configured to abut to cover the tip section. Distal component  1050  has a shape of a cylinder having a side wall  1052  and a front face  1054 , wherein front face  1054  is configured to cover a front part  5802  of inner part  5810  of tip section  5800  and proximal component  1030  has a shape of a cylinder having a side wall  1032  without a top or a bottom, configured to cover a proximal part  1104  of inner part  5810  of tip section  5800 . 
     Distal component  1050  includes on front face  1054  thereof hole  1056  configured to align with front optical assembly  1236  of forward looking camera  1116 ; optical windows  1242   a ,  1242   b  and  1242   c  of LEDs  1240   a ,  1240   b  and  1240   c ; distal opening  1340  of a working channel; distal opening  1344  of a jet fluid channel  1644 ; and I/I injector  1346  (aligning with opening  1664  of fluid channeling component  1600 ). 
     Distal component  1050  further includes on side wall  1052  thereof optical windows  1252   a  of LED  1250   a  and on an opposing side of side wall  1052  another optical window of another LED. 
     Distal component  1050  further includes on the edge of side wall  1052  thereof a recess  1756 ′ (essentially in a shape of half a hole) configured to accommodate (along with a recess  1756 ″ on the edge of side wall  1032  of proximal component  1030 ) optical assembly  1256   b  of side looking camera  1220   b . On an opposing side of side wall  1052  there may be a similar recess to accommodate (along with another recess on the edge of side wall  1032  of proximal component  1030 ) an optical assembly of a side looking camera located on the other side of inner part  5810 . 
     Proximal component  1030  includes on side wall  1032  thereof optical windows  1252   b  of LED  1250   b  and on an opposing side of side wall  1032  another optical window  1252   a  of another LED. 
     Proximal component  1030  further includes on the edge of side wall  1032  thereof a recess  1756 ″ (essentially in a shape of half a hole) configured to accommodate (along with recess  1756 ′ on the edge of side wall  1052  of distal component  1050 ) optical assembly  1256   b  of side looking cameras  220   b . On an opposing side of side wall  1032  there is a similar recess  1756   a ″ to accommodate (along with another recess on the edge of side wall  1032  of proximal component  1050 ) an optical assembly of a side looking camera located on the other side of inner part  5810 . 
     Proximal component  1030  further includes side I/I injector  1266   b  adapted to align with side I/I opening  1666   b.    
     Other parts of inner part  5810  of tip section  5800  may generally be similar to inner part  5810  of tip section  100  of  FIGS.  55 A,  55 B . 
     The method of assembling tip section  5800  over inner part  5810  may include assembling distal component  1050  from the distal part of tip section  5800 , assembling proximal component  1030  from the proximal part of tip section  5800  and joining distal component  1050  and proximal component  1030  along their edges (line  1500 ) such that none of the tip cover components slides over the optical assemblies of the side looking cameras. 
     Reference is now made to  FIG.  2 A  along with  FIGS.  59 A and  59 B  which show a perspective view of a tip section  200  of an endoscope assembly  100  according to an embodiment. 
     Tip cover  300  may be configured to fit over the inner parts of the tip section  200  including electronic circuit board assembly  400  and fluid channeling component  600  and to provide protection to the internal components in the inner parts. 
     Tip cover  300  may include a front panel  320  having a front optical assembly  256 , of front looking camera  116 . Front optical assembly  256  may include a plurality of lenses, static or movable, which may provide a field of view of 90 degrees or more, 120 degrees or more or up to essentially 180 degrees. Front optical assembly  256  may provide a focal length in the range of about 3 to 100 millimeters. 
     Optical axis of front looking camera  116  may be essentially directed along the long dimension of the endoscope. However, since front looking camera  116  is typically a wide angle camera, its field of view may include viewing directions at large angles to its optical axis. Additionally, front panel  320  may include optical windows  242   a ,  242   b  and  242   c  of illuminators  240   a ,  240   b  and  240   c , respectively. It should be noted that number of illumination sources used for illumination of the field of view may vary. 
     In addition, front panel  320  may include a working channel opening  340  of a working channel  640 , which is further discussed below. In alternate embodiments, the front panel may include more than one working channel opening. 
     Jet channel opening  344  of jet channel  644  may also be located on front panel  320  of tip cover  300 . Jet channel  644  may be configured for providing a high-pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity. 
     Also located on front panel  320  of tip cover  300  is injector opening  346  of injector channel  646  having a nozzle  348  aimed at front optical assembly  256 . Injector channel  646  may be configured for injecting fluid (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  256  of front looking camera  116 . Optionally, injector channel  646  may be configured for cleaning front optical assembly  256  and one, two or all of optical windows  242   a ,  242   b  and  242   c . Injector channel  646  may be fed by fluid, such as water and/or gas, which may be used for cleaning and/or inflating a body cavity. 
     Visible on the sidewall  362  of tip cover  300  is side optical assembly  256   b  for side looking camera  116   b , which may be similar to front optical assembly  256  and optical windows  252   a  and  252   b  of illuminators  250   a  and  250   b  for side looking camera  116   b . Also on the sidewall  362  of tip cover  300 , on the opposing side to side optical assembly  256   b , is an optical assembly for another side looking camera, which may be similar to side optical assembly  256   b  and optical windows  252   a  and  252   b  of illuminators  250   a  and  250   b  for side looking camera  116   b . The side optical assembly  256   b  may provide a focal length in the range of about 3 to 100 millimeters. 
     Optical axis of side looking camera  116   b  may be essentially directed perpendicular to the long dimension of the endoscope. Optical axis of side looking camera  116   b  is essentially directed perpendicular to the long dimension of the endoscope. However, since side looking camera  116   b  is typically a wide angle camera, its field of view may include viewing directions at large angles to its optical axis. In accordance with some embodiments, the side looking camera  116   b  has a field of view of 90 degrees or more, 120 degrees or more or up to essentially 180 degrees. 
     In various embodiments, a maximum volume of an endoscopic tip comprising the optical assemblies, such as assemblies  256 ,  256   b , is less than 3.12 cm 3 . In accordance with one embodiment, the optical assemblies of the present specification do not include any aspherical components, as such components that would lead to an increase in manufacturing cost of the optic assemblies. Also, in various embodiments, each of the optical assemblies has a focal length of approximately 1.2 mm. 
     In an embodiment, the maximum volume of an endoscopic tip containing an optical assembly within is 3.12 cm 3 , which may be obtained by using the equation: h*pi*r2; where h and r represent a length and a radius of the endoscope tip respectively. In an embodiment where h is less than 2 cm and the diameter of the endoscope is less than 1.41 cm, the volume of the endoscope tip may be obtained as: 
     2 cm*(1.41 cm/2) 2*pi=less than 3.12 cm 3    
     In accordance with one embodiment, the maximum volume of an endoscopic tip ranges from 2.75 cm 3  to 3.5 cm 3 . 
     Also visible is the side service channel opening  350  of side service channel  650 . 
     In addition, side injector opening  266  of side injector channel  666  may be located at distal end of sidewall  362 . A nozzle cover  267  may be configured to fit side injector opening  266 . Additionally, nozzle cover  267  may include a nozzle  268  which may be aimed at side optical assembly  256   b  and configured for injecting fluid to wash contaminants such as blood, feces and other debris from side optical assembly  256   b  of side looking camera  116   b . The fluid may include gas which may be used for inflating a body cavity. Optionally, nozzle  268  may be configured for cleaning both side optical assembly  256   b  and optical windows  252   a  and/or  252   b.    
     According to some embodiments, side injector channel  666  may be configured to supply fluids for cleaning any of the tip elements (such as any optical assembly, windows, illuminators, and other elements). 
     Optionally, injector channel  646  and side injector channel  666  may be fed from the same channel. 
     It is noted that according to some embodiments, although tip section  200  is presented herein showing one side thereof, the opposing side may include elements similar to the side elements described herein (for example, side looking camera, side optical assembly, injector(s), nozzle(s), illuminator(s), window(s), opening(s) and other elements). 
     In an embodiment, each viewing element provides a field of view (FOV) of 120 degrees or more, and the depth of field ranges from 3 to 100 mm. In an embodiment, a peripheral distortion caused in the optical assemblies of the endoscope is about 80% without reliance on any aspherical components, while the focal length is approximately 1.2 mm or in a range of 1 to 1.4 mm. 
     Sidewall  362  may have a form of an essentially flat surface which assists in directing the cleaning fluid injected from injector channel  666  towards side optical assembly  256   b  and optical windows  252   a  and/or  252   b . Lack of such a flat surface may result in dripping of the cleaning fluid along the curved surface of tip section  200  of the endoscope without performing the desired cleaning action. 
     In accordance with an embodiment, the sidewall  362  is located in a notch/depression in the tip cover  300 . This way, side injector opening  266  and corresponding side nozzle  268  may be elevated from the depressed sidewall  362  but still not significantly protrude from the level of cylindrical surface of the tip cover  300 . According to an aspect of one embodiment, as shown in  FIG.  59 C , the sidewall  362  is located in a sufficiently well-defined or deep notch/depression  5963  in the tip cover  300  such that the lens assembly of side optical assembly  256   b  stays sufficiently embedded in the notch/depression  363  and well below the level  5900  of the cylindrical surface of the tip cover  300 . The notch/depression  5963  protects the sidewall  362  and components thereof (side optical assembly  256   b , side illuminators  250   a ,  250   b  and side nozzle  268 ) from both longitudinal and latitudinal mechanical shocks. 
     It is noted that according to some embodiments, tip section  200  may include more than one side looking camera. In this case, the side looking cameras may be installed such that their fields of view are substantially opposing. However, different configurations and number of side looking cameras are possible within the general scope of the current specification. 
     Reference is now made to  FIG.  2 A  along with  FIGS.  60 A,  60 B , which show a perspective view of a tip section  200  of an endoscope assembly  100  with a medical tool inserted through a side service channel thereof, according to some embodiments. 
       FIG.  60 A  shows tip section  200  of endoscope assembly  100 , having side service channel  650   a  through which medical tool  360   a  is threaded and exits from side service channel opening  350   a  at essentially a right (90 degree) angle. 
       FIG.  60 B  shows tip section  200  of endoscope assembly  100 , having side service channel  650   b  through which medical tool  360   b  is threaded and exits from side service channel opening  350   b  at an obtuse angle. 
       FIG.  61 A  shows tip section  200  of an endoscope assembly comprising two independent side service channel openings, a first side service channel opening  805   a  and a second side service channel opening (not visible, as this is on the opposite side of the tip)—one on each side of the tip, in accordance with an embodiment of the present specification. The fluid channeling component comprising the side service channel openings has been described earlier with reference to  FIGS.  5 A and  5 B . 
     Referring now to  FIGS.  2 A and  61 A  simultaneously, tip cover  300  includes a front panel  320  having a front optical assembly  256 , of front looking camera  116 , along with optical windows  242   a ,  242   b  and  242   c  of illuminators  240   a ,  240   b  and  240   c , respectively. In one embodiment, the optical axis of the front looking camera  116  is essentially directed along the central longitudinal axis  6103  that runs through the long dimension of the tip of the endoscope. The front panel  320  includes a working channel opening  340  of a working channel  640  and jet channel opening  344  of jet channel  644 . Jet channel  644  is configured for providing a high-pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity. Also located on front panel  320  of tip cover  300  is injector opening  346  of injector channel  646  having a nozzle  348  aimed at front optical assembly  256 . Injector channel  646  is configured for injecting fluid (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  256  of front looking camera  116 . Optionally, injector channel  646  may be configured for cleaning front optical assembly  256  and one, two or all of optical windows  242   a ,  242   b  and  242   c . Injector channel  646  is fed by fluid such as water and/or gas which may be used for cleaning and/or inflating a body cavity. 
     It should be noted that the side service channel opening  805   a  and the opening on the opposite side of the tip (not visible) are advantageously positioned close to the side injector openings  266  on the opposing sidewalls  362  (at both sides of the tip) and towards the proximal end  6101  of the tip. The sidewall  362  of tip cover  300  comprises side optical assembly  256   a  for a side looking camera, which may be similar to front optical assembly  256 , and optical windows  252   a  and  252   b  of illuminators for the side looking camera. Similarly, the sidewall  362  of tip cover  300  on the opposing side to side optical assembly  256   a  is an optical assembly  256   b  for side looking camera  116   b , which may be similar to side optical assembly  256   a , and optical windows  252   a  and  252   b  of corresponding illuminators for side looking camera  116   b . In one embodiment, the optical axis of one or both of the side looking cameras is essentially perpendicular to the optical axis (which is along the central longitudinal axis  6103  of the endoscope) of the front looking camera  116 . In one embodiment, the optical axis of one or both of the side looking cameras forms an obtuse angle with the optical axis of the front camera  116  while in an alternate embodiment the optical axis of one or both of the side cameras forms an acute angle with the optical axis of the front camera  116 . 
     Referring now to  FIGS.  2 A,  5 A,  5 B  along with  FIG.  61 A , according to an aspect of the present specification, the position of the side service channel openings close to the side injector openings and towards the proximal end of the tip enables an increased effective functional length of the tip section. In one embodiment, the position of the side service channel openings  805   a ,  805   b  relative to the depth of field of 5 millimeters of the side looking cameras allows for a more acute angle of exit  820  of the distal sections  813  of the side service channels with reference to the long dimension of the tip. Acuter angles  820  are desirable so that medical tools inserted through the side service channel openings protrude closer to the sidewalls of the endoscope thereby lowering the possibilities of hurting a body cavity/wall while coming out of the tip while at the same time facilitating smooth passage within the side service channels. In one embodiment, the angle of exit  820  of the side service channels ranges from 5 degrees to 90 degrees and any increment therein, but preferably 45 degrees. Also, the positions of the side service channels allow the side looking cameras to clearly notice the medical tools as the tools protrude from the side service channel openings. 
     With reference to  FIGS.  2 A and  61 A , in one embodiment, the side optical assembly  256   a  for the side looking camera is positioned on the circumference of the endoscope at a distance of 8 to 10 millimeters, and preferably at 9 or 9.1 millimeters, from the surface  320  (front panel) of the tip. 
     In accordance with one embodiment, relative to the side optical assembly  256   a , the optical windows  252   a  and  252   b  (of the corresponding illuminators) are positioned in close proximity to the optical assembly  256   a  along a lateral plane that contains the side optical assembly  256   a  and the optical windows  252   a ,  252   b  but does not contain the front optical assembly  256 . 
     In one embodiment, relative to the side optical assembly  256   a , the side injector opening  266  is positioned 5.8 to 7.5 millimeters, and preferably 6.7 millimeters, from the optical assembly  256   a  along the lateral plane that contains the side optical assembly  256   a  and the optical windows  252   a ,  252   b  but does not contain the front optical assembly  256 . 
     In accordance with one embodiment, relative to the side optical assembly  256   a , the side service channel opening  805   a  is positioned 9.5 to 10.5 millimeters, and preferably 10.2 millimeters, from the side optical assembly  256   a . The side service channel  812  (as shown in  FIG.  5 B ) has a diameter of about 2.8 to 3.2 millimeters, in one embodiment. 
       FIG.  61 B  shows the tip section  200  of the endoscope assembly of  FIG.  61 A , having side service channel  810   a  through which medical tool  6120   a  is threaded and exits from side service channel opening  805   a  at an acute angle. 
       FIG.  61 C  shows the tip section  200  of endoscope assembly of  FIG.  61 A , having side service channel  810   b  through which medical tool  6120   b  is threaded and exits from side service channel opening  805   b  at essentially a right angle (90 degrees). 
     Reference is now made to  FIG.  2 B  along with  FIG.  62    which together show exploded views of a tip section  200  of an endoscope assembly  100  according to an embodiment having the tip section  200  equipped with two or more front working channels. 
     Tip section  200  may be turnable by way of flexible shaft which may also be referred to as a bending section, for example a vertebra mechanism. 
     Tip cover  300  may be configured to fit over the inner parts of the tip section  200  including electronic circuit board assembly  400  and fluid channeling component  600  and to provide protection to the internal components in the inner parts. 
     Tip cover  300  may include a front panel  320  having a front optical assembly  256  of front-pointing camera  116   a . Front optical assembly  256  may include a plurality of lenses, static or movable, which may provide a field of view of up to essentially 180 degrees. Front optical assembly  256  may provide a focal length of up to about 100 millimeters. 
     Optical axis of front-pointing camera  116   a  may be essentially directed along the long dimension of the endoscope. However, since front-pointing camera  116   a  is typically a wide angle camera, its field of view may include viewing directions at large angles to its optical axis. Additionally, front panel  320  may include optical windows  242   a  and  242   b  of illuminators  240   a  and  240   b , respectively. It should be noted that number of illumination sources used for illumination of the field of view may vary. 
     In addition, front panel  320  may include a working channel opening  340   a  of a working channel  640   a , and a second working channel opening  340   b  of a second working channel  640   b  which are further discussed below. 
     Jet channel opening  344  of jet channel  644  may also be located on front panel  320  of tip cover  300 . Jet channel  644  may be configured for providing a high-pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity. 
     Also located on front panel  320  of tip cover  300  is injector opening  346  of injector channel  646  having a nozzle  348  aimed at front optical assembly  256 . 
     Injector channel  646  may be fed by a fluid or fluid blend, such as water and/or gas, and configured for injecting a fluid blend (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  256  of front-pointing camera  116   a . In addition, the fluid blend may include gas, which may be used for inflating a body cavity. 
     Optionally, injector channel  646  may be configured for cleaning front optical assembly  256  and one or both of optical windows  242   a  and  242   b.    
     A sidewall  362   a  of tip cover  300  may include an optical assembly  256   b  for side-pointing camera  116   b , which may be similar to front optical assembly  256 , and optical windows  252   a  and  252   b  of illuminators  250   a  and  250   b  for side-pointing camera  116   b.    
     A sidewall  362   b  of tip cover  300 , which may be similar to sidewall  362   a  and located on the opposite side of tip cover  300 , may include an optical assembly  256   a  for side-pointing camera  116   c , which may be similar to front optical assembly  256 , and optical windows  262   a  and  262   b  of illuminators  260   a  and  260   b  for side-pointing camera  116   c.    
     Optical axis of side-pointing cameras  116   b  and  116   c  may be essentially directed perpendicular to the long dimension of the endoscope. However, since side-pointing cameras  116   b  and  116   c  are typically wide angle cameras, their fields of view may include viewing directions at large angles to their optical axes. 
     According to some embodiments, side injector channels  666   a  and  666   b  may be configured to supply fluids for cleaning any of the tip elements (such as any optical assembly, windows, illuminators, and other elements). Side injectors opening  266   a  and  266   b  of side injector channels  666   a  and  666   b  may be located at distal end of sidewalls  362   a  and  362   b  respectively. Nozzle covers  267   a  and  267   b  may be configured to fit side injectors opening  266   a  and  266   b.    
     Additionally, nozzle covers  267   a  and  267   b  may include nozzles  268   a  and  268   b  which may be aimed at side optical assembly  256   b  and  256   a  and configured for injecting a fluid or fluid blend to wash contaminants such as blood, feces and other debris from side optical assemblies  256   b  and  256   a  of side-pointing cameras  116   b  and  116   c . Optionally, nozzles  268   a  and  268   b  may be configured for cleaning side optical assemblies  256   b  and  256   a  and optical windows  252   a ,  252   b ,  262   b  and/or  262   b.    
     Optionally, injector channel  646  and side injector channels  666   a  and  666   b  may be fed from the same channel. 
     It is noted that according to some embodiments, the endoscope tip may include more than one optical window and illuminator on the side and more than one optical window and illuminator on the front. 
     Sidewalls  362   a  and  362   b  may have a form of an essentially flat surface, which assists in directing the cleaning fluid injected from injector channels  666   a  and  666   b  towards side optical assemblies  256   b  and  256   a  and optical windows  252   a ,  252   b ,  262   a  and/or  262   b . Lack of such a flat surface may result in dripping of the cleaning fluid along the curved surface of tip section  200  of the endoscope without performing the desired cleaning action. 
     Reference is now made to  FIG.  63    which shows a perspective view of a tip section  200  of an endoscope assembly comprising two front working/service channels in close proximity, according to some embodiments. Tip cover  300  may be configured to fit over the inner parts of the tip section  200  including the fluid channeling component, such as the fluid channeling component  645  of  FIG.  7   , and to provide protection to the internal components in the inner parts. 
     Tip cover  300  may include a front panel  320  having a front optical assembly  256  of a front looking viewing element. Front optical assembly  256  may include a plurality of lenses, static or movable, which may provide a field of view of up to essentially 180 degrees. Front optical assembly  256  may provide a focal length of up to about 110 millimeters. 
     Additionally, front panel  320  may include optical windows  242   a ,  242   b  and  242   c  of three separate illuminators. It should be noted that number of illumination sources used for illumination of the field of view may vary. 
     In an embodiment, the optical windows  242   a ,  242   b  and  242   c  are oval shaped. The oval shape allows the inclusion of a second front service channel  340   b  on the front panel  320 . The oval shape of the optical windows is designed to overcome the problem of crowdedness due to the number of components in the front panel  320  (i.e. two working/service channels  340   a ,  340   b , camera, three illuminators (LEDs), injector and a jet) and also allows the size of the two working/service channels  340   a ,  340   b  to be kept at a maximum. In an embodiment, when two working/service channels  340   a ,  340   b  of diameters 3.8 mm and 2.8 mm respectively, are included in the front panel  320 , the placement of the circuit board assembly as far as possible from the fluid channeling component causes one of the LEDs to be placed almost on the circumference of the front panel  320 . Oval shaped optical window  242   b  covers the LED suitably. If a round shaped optical window is used instead, it would lead to a reduction in the diameters of the front working/service channels  340   a ,  340   b.    
     The working/service channel  340   a  may be configured for insertion of a medical (such as a surgical) tool, for example, to remove, treat and/or extract a sample or the entirety of an object of interest found in the colon for biopsy. Once an object of interest has been detected, the endoscope operator may desire to insert one or more medical tools and remove, treat and/or extract a sample or the entirety of the polyp for biopsy. Therefore, it may be beneficial for the endoscope&#39;s operator to be able to use more than one medical tool. 
     In an embodiment, as illustrated, front panel  320  also comprises the secondary working/service channel  340   b  which may be similar to working/service channel  340   a  and may be configured for insertion of a medical tool, for example but not necessarily, in addition to the medical tool which may be inserted through working/service channel  340   a . The operator may also choose from which working/service channel he or she would like to insert the medical tool, for example, according to the position of the polyp. 
     The second working/service channel  340   b  may be configured to improve the performance of the endoscope (such as, but not limited to, gastroscopes and colonoscopes). Current gastroscopes and colonoscopes typically have one service channel which opens at the front distal section of the scope. Such a front service channel is adapted for insertion of a surgical tool. The physician is required to perform all necessary medical procedures, such as biopsy, polyp removal and other procedures, via this one channel. In an embodiment, either one or both of the working/service channels  340   a  and  340   b  may be adapted for performing suction during a procedure. In an embodiment, no structural changes are required to be made to the working/service channels  340   a  and  340   b  for adapting the same for performing suction. 
     In an embodiment, the distance between the first and second working/service channels  340   a  and  340   b  is approximately in the range of 0.40 mm to 0.45 mm. In one embodiment, the diameter of the first working/service channel  340   a  is in a range of 3.6 mm to 4.0 mm and the diameter of the second working/service channel  340   b  is in a range of 2.6 mm to 3.0 mm. In an embodiment, the diameter of the first working/service channel  340   a  is 3.8 mm while the diameter of the second working/service channel  340   b  is 2.8 mm. In other embodiments, the diameters of the two working/service channels may be of different dimensions. In an embodiment, the diameters of the two working/service channels are the same. First and second channels may be the same or different in shape and size. The diameter of a working/service channel is limited by the outer diameter of the endoscope tip. In one embodiment, the outer diameter of the endoscope tip is in a range of 7 mm to 12 mm. In one embodiment, the outer diameter of the endoscope tip is 11.9 mm. 
     A working/second service channel, such as the second working/service channel  340   b , allows greater flexibility to the endoscope operator by providing a channel for the insertion of medical tools in addition to, or instead of, the medical tools which may be inserted through working/service channel  340   a.    
     The front panel  320  may further comprise a jet fluid channel  344  which may be configured for providing a high pressure jet of fluid, such as, water or saline, for cleaning the walls of the body cavity (such as the colon) and optionally for suction. The front panel  320  may further comprise an injector channel pathway  346 , which may be used for blending two fluids (like air and water) and convey the fluid blend into injector channel  346  which may be configured to inject the fluid blend and wash contaminants such as blood, feces and other debris from front optical assembly  256  of the front-pointing camera. 
     Visible on the sidewall  362  of tip cover  300  is side optical assembly  256   b  for a side looking viewing element, which may be similar to front optical assembly  256 , and optical windows  252   a  and  252   b  of the side illuminators for the side looking viewing element. In an embodiment, the optical windows  252   a  and  252   b  are oval in shape. In another embodiment, the optical windows  252   a  and  252   b  may be round in shape. 
     In addition, side injector opening  266  of a side injector channel is located at the proximal end of sidewall  362 . It is noted that according to some embodiments, although tip section  200  is presented herein showing one side thereof, the opposing side may include elements similar to the side elements described herein (for example, side looking viewing element, side optical assembly, injector(s), nozzle(s), illuminator(s), window(s), opening(s) and other elements). Sidewall  362  may have a form of an essentially flat surface which assists in directing the cleaning fluid injected from a side injector channel toward side optical assembly  256   b  and optical windows  252   a  and/or  252   b . Lack of such a flat surface may result in dripping of the cleaning fluid along the curved surface of tip section  200  of the endoscope without performing the desired cleaning action. 
     It is noted that according to some embodiments, tip section  200  may include more than one side looking viewing element. In this case, the side looking viewing elements may be installed such that their field of views are substantially opposing. However, different configurations and numbers of side looking viewing elements are possible within the general scope of the current specification. 
       FIG.  64    illustrates a tip of an endoscope, in accordance with an embodiment wherein the jet opening  6426  and nozzle opening  6424  may be positioned adjacent to each other on the front panel  6412 . In another embodiment, the jet opening  6426  and nozzle opening  6424  may be positioned on either side of the working/service channel opening  6422  on the front panel  6412 . A tip cover sheaths the endoscope tip and the components therein. A diameter of the endoscope tip  6400  ranges from approximately 10 to 15 millimeters. In an embodiment, the diameter is approximately 11.7 millimeters. A side panel  6402  is positioned on a side of the endoscope tip  6400 . The side panel  6402  comprises a side optical assembly  6404 , optical windows  6406 ,  6408 , and a side nozzle  6410 . The side optical assembly  6404  is positioned on the circumference of the endoscope tip at a distance ranging from approximately 6 to 9 millimeters from the surface of the tip  6400 , and in an embodiment is positioned at approximately 7.8 or 7.9 millimeters, from the surface of the tip  6400 . 
     A front panel  6412  is positioned on a front end of the endoscope tip  6400 . The front panel  6412  comprises a front optical assembly  6414 , optical windows  6416 ,  6418 ,  6420 , a working/service channel opening  6422 , a nozzle opening  6424  and a jet opening  6426 . The diameter of the front working/service channel ranges from approximately 2.8 to 4.8 millimeters. In one embodiment, the diameter of the front working/service channel ranges from 3.2 mm to 4.8 mm. In another embodiment, the diameter ranges from approximately 4.2 to 4.8 millimeters. In one embodiment, the diameter of the front working/service channel is 3.2 mm. In another embodiment, the diameter of the front working/service channel is 3.8 mm. In yet another embodiment, the diameter of the front working/service channel is 3.8 mm. In still yet another embodiment, the diameter of the front service channel is 4.8 mm. 
     Along with  FIG.  2 A , reference is now made to  FIGS.  65 A through  65 D  which show a perspective view of a tip section  200  of a multi-jet endoscope assembly  6501  comprising a plurality of side jets, in addition to a front jet, to enable improved flushing according to an embodiment of the present specification. 
     Tip cover  300  fits over the inner parts of the tip section  200  including electronic circuit board assembly  400  (shown in  FIG.  2 A ) and fluid channeling component  600  (of  FIG.  65 D ) and to provide protection to the internal components in the inner parts. Pins  670  for tip cover  300  are provided on fluid channeling component  600 , as shown in  FIG.  65 D . Further,  FIG.  65 D  shows a groove  6572  for an electrical cable. Tip cover  300  includes a front panel  320  having a front optical assembly  256 , of front looking camera  116 , along with optical windows  242   a ,  242   b  and  242   c  of illuminators  240   a ,  240   b  and  240   c , respectively. 
     The front panel  320  includes a working channel opening  340  of a working channel  640  and jet channel opening  344  of jet channel  644 . Jet channel  644  is configured for providing a high-pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity. Also located on front panel  320  of tip cover  300  is injector opening  346  of injector channel  646  having a nozzle  348  aimed at front optical assembly  256 . Injector channel  646  is configured for injecting fluid (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  256  of front looking camera  116 . Optionally, injector channel  646  may be configured for cleaning front optical assembly  256  and one two or all of optical windows  242   a ,  242   b  and  242   c . Injector channel  646  is fed by fluid such as water and/or gas which may be used for cleaning and/or inflating a body cavity. In one embodiment, the optical axis of the front looking camera  116  is essentially directed along the central longitudinal axis  6503  that runs through the long dimension of the tip of the endoscope  6501 . 
       FIG.  65 B  shows sidewall  362  of tip cover  300  comprising side optical assembly  256   a  for a side looking camera, which may be similar to front optical assembly  256 , and optical windows  252   a  and  252   b  of illuminators for the side looking camera. Also, as shown in  FIG.  65 C , the sidewall  362  of tip cover  300  on the opposing side to side optical assembly  256   a  is an optical assembly  256   b  for side looking camera  116   b , and optical windows  252   a  and  252   b  of corresponding illuminators for side looking camera  116   b . In one embodiment, the optical axis of one or both of the side looking cameras are essentially perpendicular to the optical axis (which is along the central longitudinal axis  6503  of the endoscope) of the front looking camera  116 . In one embodiment, the optical axis of one or both of the side looking cameras forms an obtuse angle with the optical axis of the front camera  116  while in an alternate embodiment, the optical axis of one or both of the side cameras forms an acute angle with the optical axis of the front camera  116 . 
     In addition, side injector openings  266  of corresponding side injector channels  666  are located at respective distal ends of the opposing sidewalls  362  as shown in  FIGS.  65 B and  65 C . Nozzle covers  267  may be configured to fit the corresponding side injector openings  266 . The nozzle covers include nozzles  268  that are aimed at side optical assemblies  256   a ,  256   b  and configured for injecting fluid to wash contaminants such as blood, feces and other debris from side optical assemblies  256   a ,  256   b  of the side looking cameras. The fluid may include gas which may be used for inflating a body cavity. Optionally, nozzles  268  may be configured for cleaning the side optical assembly and both optical windows on the opposing sides of the tip  200 . 
     According to some embodiments, side injector channels  666  may be configured to supply fluids for cleaning any of the tip elements (such as any optical assembly, windows, illuminators, and other elements). Optionally, injector channel  646  and side injector channels  666  may be fed from the same channel. 
     As shown in  FIGS.  65 A through  65 D , in accordance with an embodiment, two side jet openings  605   a ,  610   a , fed by a common side jet channel  6506 , are provided around the side periphery at the proximal end of the tip  200 . Thus, the two side jet openings  605   a ,  610   a  which are fed by common side jet channel  6506  form a Y-shaped fluid conduit. The manifold shown in  FIG.  65 D  includes a housing having a partially cylindrical shape with a curved top surface, a partially curved first side and a partially curved second side, wherein manifold housing is formed from a base portion with a first width, a first length, and a proximal surface and an elongated portion, which is attached to the base portion, with a second width, a second length, and a distal surface, wherein the first width is greater than the second width and the first length is less than the second length. A first channel  640  extends from the base portion through the elongated portion, wherein the first channel  640  has an entrance port positioned on said proximal surface of the base portion and an exit port positioned on a distal surface of the elongated portion. A second  644  extends from the base portion through the elongated portion, wherein the second channel  644  has an entrance port positioned on said proximal surface of the base portion and an exit port positioned on a distal surface of the elongated portion. 
     The manifold further includes a Y-shaped fluid conduit comprising a central stem portion  6506 , a first prong portion  605   a , and a second prong portion  610   a , wherein the central stem portion  6506  extends from an entrance port  607  on the proximal surface of the base portion through the base portion, wherein the first prong portion  605   a  extends from an end of the central portion through the base portion to an exit port on the partially curved first side; and wherein the second prong portion  610   a  extends from an end of the central portion through the base portion to an exit port the partially curved second side. 
     A third channel  646  extends from an entrance port on the proximal surface of the base portion through to an exit port on the partially curved first side. A fourth channel extends from an entrance port on the proximal surface of the base portion through to an exit port on the partially curved second side. Each of the first, second, third, and fourth channels are fluidically isolated and separated from each other. 
     The common side jet channel  6506  has an entry port  607  at a proximal end of the fluid channeling component  600 . Similarly, two side jet openings  605   b ,  610   b , fed by another common side jet channel  6506 , are provided on the opposite side. In one embodiment the two side jet openings  605   a ,  605   b ,  610   a ,  610   b  on either side of the tip are positioned in such a way that the side injector openings  266  (one on both sides of the tip) are situated between them. Additionally, in one embodiment, the two side jet openings  605   a ,  605   b ,  610   a ,  610   b  on either side of the tip are positioned close to the side optical assemblies  256   a ,  256   b  of the side looking cameras (on both sides of the tip) such that when fluid is ejected from the side jet openings it is propelled at an approximately 45 degree angle and past the cameras, so that a physician can see the fluid being expelled. The fluid can be water or saline. 
       FIG.  65 E  shows the multi jet endoscope assembly  6501  (of  FIGS.  65 A through  65 C ) being moved inside a body cavity  6501  while multiple high-pressure fluid jets are being expelled from the front jet opening  6544  as well as the side jet openings  6505 ,  6510 . As can be seen, the side fluid jets are being expelled at an acute angle relative to a lateral plane containing a first side optical assembly  6556   a  and a second side optical assembly (not visible) and corresponding side optical windows but not containing front optical assembly  6556  of the front looking camera. The acute angle of exit enables fluid to be expelled along the direction of movement of the endoscope  6501 , in accordance with one embodiment. 
     The side jet openings are fed with high-pressure fluid through side jet channels formed in the fluid channeling component  600  of  FIG.  65 D . In one embodiment, each side jet opening is fed with a separate corresponding side channel while in other embodiments the side jet openings are fed from a common side channel. The side jet channels may be distinct from or common to the front jet channel  6544 . 
     In accordance with another aspect of the present specification, the side jet channel openings  6505  and  6510  can be operated at a plurality of predefined algorithms such as continuous fluid stream, fluid stream pulsing at different flow rates, fluid stream being expelled at different timings with respect to the different side jet openings, fluid stream at different pressures or any other suitable algorithm as would be evident to persons of ordinary skill in the art. Also, while in one embodiment all side jet openings operate at one selected algorithm, in alternate embodiments each side jet opening can operate independently and at different operating algorithms using a distributer to control the operation of the jets. 
     In accordance with an aspect of the present specification, a side jet sprinkler comprising a plurality of holes is used over at least one of the side jet openings  605   a ,  605   b ,  610   a ,  610   b  so as to split the fluid emanating from the underlying side jet opening(s). Referring now to  FIG.  66   , a side jet sprinkler  6600  is illustrated in accordance with an embodiment of the specification. Side jet sprinkler  6600  may be an attachment or a “patch” that includes a plurality, such as two or more, of holes  6670 . As an example,  FIG.  66    shows the side jet sprinkler  6600  placed over the side jet opening  610   a , such that holes  6670  are aligned directly over side jet opening  610   a . Thus, fluid exiting side jet opening  610   a  may then be split to exit through holes  6670 , forming multiple jets of fluid—in a sprinkling manner. Side jet sprinkler  6600  may thus enable a wider coverage of cleaning fluid around periphery of the tip section of the endoscope, allowing an improved cleaning function of a body cavity. 
     In an embodiment, a front jet sprinkler, with a plurality of holes, may be placed over jet channel opening  344  of front jet channel  644  ( FIGS.  65 A through  65 D ). The front jet sprinkler may be configured in a similar manner as side jet sprinkler  6600 , such that it may be positioned to fit over jet channel opening  344  on front panel  320 . 
     In an embodiment, the side jet sprinkler  6600  may be removable. It may be placed on tip cover  300  of  FIG.  2 A , and later removed. In some embodiments, side jet sprinkler  6600  may be pressed against the tip cover  300  such that it sticks to it. Optionally, side jet sprinkler  6600  may be pressed and glued to tip cover  300 . In addition to front and side jets, the use of side jet sprinkler  660  may further improve the ability to clean/flush the body cavity. 
     With reference to  FIGS.  65 A through  65 D  and  FIG.  66   , it should be noted that, in alternate embodiments, the side jet openings (such as  605   a ,  605   b ,  610   a ,  610   b ) and/or the plurality of holes  6670  of the side jet sprinkler  6600  can be configured around the side periphery in any suitable number, including 2, 4, 6, or 8. Also, the side jet openings  605   a ,  605   b ,  610   a ,  610   b  and/or holes  6670  can have a plurality of angular configurations causing fluid to exit at different angles relative to a lateral plane that includes the side optical assemblies of side looking cameras and the optical windows of the corresponding illuminators but not the front optical assembly of the front looking camera. In one embodiment, the optical axis of the side looking cameras is perpendicular to the lateral plane as well as the optical axis of the front looking camera which is along the central longitudinal axis  6503  of the endoscope. These angles of fluid exit can range from 45 to 60 degrees or 120 to 135 degrees relative to the lateral plane. Acute angles of exit of 45 to 60 degrees enable fluid to be expelled in the direction of movement of the endoscope while obtuse angles of exit of 120 to 135 degrees enable fluid to be expelled in the direction opposite to the direction of movement of the endoscope, thereby aiding the endoscope movement within a body cavity. This is because, if the jet is directed in an opposite direction of movement of the endoscope, the resistance of the colon walls may push the scope forward like a jet engine. 
     Referring to  FIGS.  67 A and  67 B , in accordance with one embodiment, side jet openings  6705 ,  6710  are positioned 8.5 to 9.5 millimeters from the side optical assemblies  1056   a ,  1056   b  on the circumference of the endoscope such that the fluid exiting the openings form angles ranging from 50 degrees (as shown in  FIG.  67 A ) to 60 degrees (as shown in  FIG.  67 B ) relative to a lateral plane containing the side optical assemblies  6756   a ,  6756   b  and corresponding side optical windows (but not containing front optical assembly of the front looking camera). Also, the side jet openings  6705 ,  67010  have a diameter of about 1.4 to 1.7 millimeters, in one embodiment. 
     As shown in  FIGS.  68 A and  68 B , in some embodiments of the specification, side jet openings (such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D ) may be covered by peripheral jet openings  130 , which comprise, in one embodiment, a plurality of holes drilled through tip cover  300 . Peripheral jet openings  130  may further disseminate fluid circulated through side jet openings (such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D ) in to multiple smaller exits. Cleaning fluid that is circulated by side jet channels  6506 ,  6506 , may flow through side jet openings and conveyed along an integrated groove connected to side jet channels  6506 ,  6506  on the periphery of the tip cover  300 . The groove is surrounded by the smaller and multiple holes aligned on circumference of tip cover  300  as peripheral jet openings  130 . Thus the cleaning fluid emerging from side jet openings (such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D ) exits through the multiple holes of peripheral jet openings  130 . This enables the cleaning fluid to reach all around (360 degrees) the tip cover  300 , into the body cavity, which may allow for a better cleaning procedure that may solve or mitigate the problem of less efficient colonoscopies due to a non-cleaned colon. 
     Peripheral jet openings  130  may have a plurality of angular configurations causing fluid to exit at different angles relative to a lateral plane that includes the side optical assemblies of side viewing elements and the optical windows of the corresponding illuminators. In an embodiment, peripheral jet openings  130  may be drilled at acute angles relative to the long dimension of the endoscope. In another embodiment, peripheral jet openings  130  may be drilled at 90 degrees relative to the long dimension of the endoscope. In yet another embodiment, peripheral jet openings  130  may be drilled at obtuse angles relative to the long dimension of the endoscope. In an alternative embodiment, each hole of peripheral jet openings  130  may be drilled at angles that are a combination of one or more acute angles, 90 degrees angles, and one or more obtuse angles. Acute angles of exit may enable fluid to be expelled in the direction of movement of the endoscope while obtuse angles of exit may enable fluid to be expelled in a direction opposite to the direction of movement of the endoscope, thereby aiding the endoscope movement within the body cavity. 
     Reference is now made to  FIGS.  2 A,  68 A and  68 B  along with  FIGS.  69 A,  69 B, and  70   , which respectively show front and rear perspective views, and a side view of a tip section  200  of an endoscope assembly according to an embodiment. The  FIGS.  69 A,  69 B, and  70    illustrate the internal components that are enclosed by tip cover  300  described in  FIGS.  68 A and  68 B  above. It should be appreciated that in accordance with this embodiment, the tip cover  300  of  FIG.  2 A  is replaced by the tip cover  300  described in  FIGS.  68 A and  68 B , the fluid channeling component  600  of  FIG.  2 A  is replaced by the fluid channeling component  600  of  FIG.  65 D , while the circuit board assembly  400  of  FIG.  2 A  remains unchanged. 
     Tip cover  300  may include a front panel  320  having a front optical assembly  256 , of front looking camera  116 . Front optical assembly  256  may include a plurality of lenses, static or movable, which may provide a field of view of 90 degrees or more, 120 degrees or more or up to essentially 180 degrees. Front optical assembly  256  may provide a focal length in the range of about 3 to 100 millimeters. Additionally, front panel  320  may include optical windows  242   a ,  242   b  and  242   c  of illuminators  240   a ,  240   b  and  240   c , respectively. It should be noted that number of illumination sources used for illumination of the field of view may vary. In addition, front panel  320  may include a working channel opening  340  of a working channel  640 . 
     Jet channel opening  344  of jet channel  644  may also be located on front panel  320  of tip cover  300 . Jet channel  644  may be configured for providing a high-pressure jet of fluid, such as water or saline, for cleaning the walls of the body cavity. 
     Also located on front panel  320  of tip cover  300  is injector opening  346  of injector channel  646  having a nozzle aimed at front optical assembly  256 . Injector channel  646  may be configured for injecting fluid (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly  256  of front looking camera  116 . Optionally, injector channel  646  may be configured for cleaning front optical assembly  256  and one, two or all of optical windows  242   a ,  242   b  and  242   c . Injector channel  646  may be fed by fluid such as water and/or gas which may be used for cleaning and/or inflating a body cavity. 
     Visible on the sidewall  362  of tip cover  300  is side optical assembly  256   b  for side looking camera  116   b , which may be similar to front optical assembly  256 , and optical windows  252   a  and  252   b  of illuminators  250   a  and  250   b  for side looking camera  116   b . Also on the sidewall  362  of tip cover  300  on the opposing side to side optical assembly  256   b  is an optical assembly for another side looking camera, which may be similar to side optical assembly  256   b , and optical windows of illuminators for the other side looking camera. The side optical assembly  256   b  may provide a focal length in the range of about 3 to 100 millimeters. 
     In addition, side injector opening  266  may be located on sidewall  362 . A nozzle cover may be configured to fit side injector opening  266 . Additionally, the nozzle cover may include a nozzle which may be aimed at side optical assembly  256   b  and configured for injecting fluid to wash contaminants such as blood, feces and other debris from side optical assembly  256   b  of side looking camera  116   b . The fluid may include gas which may be used for inflating a body cavity. Optionally, nozzle may be configured for cleaning both side optical assembly  256   b  and optical windows  252   a  and/or  252   b.    
     Side panel  362  also includes at least one side jet opening  610   a  (which is one of any of the side jet openings such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D ) that vents cleaning fluid circulated through side jet channels  6506 ,  6506 . Another, similar, at least one side jet opening (not visible) may provide a second vent on the opposite side panel of the tip section  300 . A peripheral groove  330  connected to side jet opening  610   a  and the other side jet opening on the opposite side panel of the tip section  300  may provide a channel for fluid vent by the two side jet openings. The fluid may circulate through the channel of peripheral groove  330  around the circumference of the tip section  300 . In one embodiment, each side jet opening is fed with a separate corresponding side jet channel while in other embodiments the side jet openings are fed from a common side channel. The side jet channels may be distinct from or common to front jet channel  644 . 
     In accordance with another aspect of the specification, side jet openings (such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D ) may be operated at a plurality of predefined algorithms, such as continuous fluid stream, fluid stream pulsing at different flow rates, fluid stream being expelled at different timings with respect to the different side jet openings, fluid stream at different pressures or any other suitable algorithm as would be evident to persons skilled in the art. Also, while in one embodiment all side jet openings operate at one selected algorithm, in alternate embodiments each side jet opening may operate independently and at different operating algorithms using a distributer to control the operation of the jets. 
     It is noted that according to some embodiments, although tip section  300  is presented herein showing one side thereof, the opposing side may include elements similar to the side elements described herein (for example, side viewing element, side optical assembly, injector(s), nozzle(s), illuminator(s), window(s), opening(s) and other elements). 
     It is noted that according to some embodiments, the tip section may include more than one side viewing elements. In this case, the side viewing elements may be installed such that their field of views are substantially opposing. However, different configurations and numbers of side viewing elements are possible within the general scope of the current specification. 
     Along with  FIGS.  68 A,  68 B,  69 A,  69 B and  70   , reference is now made to  FIG.  71   , which shows a cross-section view of tip section  200  enclosed within tip cover  300  of  FIGS.  68 A,  68 B , according to an embodiment.  FIG.  71    simultaneously illustrates side viewing elements  116   a  and  116   b . Side illuminators  250   a ,  250   b  are positioned to illuminate side viewing element  116   a , and side illuminators  250   c ,  250   d  are positioned to illuminate side viewing element  116   b . Also seen is front viewing element  116  along with front illuminators  240   a ,  240   b.    
     Additionally, alignment of peripheral jet openings  130  in tip cover  300 , with peripheral (jet channel) groove  330 , is illustrated. Cross section view of side jet opening  610   a  may be seen connected to peripheral jet channel groove  330 . Fluid may flow through side jet channels  6506 , side jet opening  610   a , in through peripheral jet channel groove  330 , and exit through multiple holes of peripheral jet openings  130  in tip cover  300 , thus enabling a 360-degree dispersion of the fluid into the body cavity of a patient. 
     It should be noted that, in alternate embodiments, the number of peripheral jet openings  130  may vary. In various embodiments, the diameter of each hole in peripheral jet openings  130  may be in the range of 0.40-0.80 millimeters. In some embodiments, the diameter of each hole in peripheral jet openings  130  may be 0.50 millimeters. The minimum distance between two holes may be 0.20 millimeters. These exemplary embodiments may be suitable for endoscopic tip diameters in the range of 9 to 17 millimeters. 
     Reference is now made to  FIG.  72   , which illustrates a multi jet ring assembly  7200  in accordance with an alternative embodiment of the specification. Multi-jet ring assembly  7200  may be placed over side jet openings, such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D , on a tip cover. The side jet openings may provide an exit for fluid circulated by side jet channels of a tip section of an endoscope assembly. In embodiments, a peripheral groove  7202  may be placed on an internal periphery of multi-jet ring assembly  7200 , such that the side jet channel openings may be aligned with peripheral groove  7202 . Moreover, multiple holes  7204  may be drilled along peripheral groove  7202 . Multiple holes  7204  may allow multiple jet exit of the fluid circulated through peripheral groove  7202 . 
     In one embodiment, multi-jet ring assembly  7200  is disposable and is adapted for all scopes having a side jet channel (such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D ), including scopes having one front working/service channel, two front working/service channels, and scopes having one or two side working/service channels. 
     Multiple holes  7204  may have a plurality of angular configurations causing fluid to exit at different angles relative to a long dimension of the endoscope. In an embodiment, multiple holes  7204  may be drilled at acute angles relative to the long dimension of the endoscope. In another embodiment, multiple holes  7204  may be drilled at 90 degrees relative to the long dimension of the endoscope. In yet another embodiment, multiple holes  7204  may be drilled at obtuse angles relative to the long dimension of the endoscope. In an alternative embodiment, each hole of multiple holes  7204  may be drilled at angles that are a combination of one or more acute angles, 90 degrees angles, and one or more obtuse angles. Acute angles of exit may enable fluid to be expelled in the direction of movement of the endoscope while obtuse angles of exit may enable fluid to be expelled in a direction opposite to the direction of movement of the endoscope, thereby aiding the endoscope movement within a body cavity, and vice versa. 
     A first diameter  7206  of multi-jet ring assembly  7200  may be adapted to a diameter of the tip cover, and is of a dimension such that multi jet ring assembly  7200  fits over the tip cover. A second diameter  7208  of multi jet ring assembly  7200  may be larger than first diameter  7206 . While first diameter  7206  may define the dimension for the outer edges of multi-jet ring assembly  7200 , second diameter  7208  may correspond to the inner ring that forms peripheral groove  7202 . 
     Pre-adjustment of the tip cover may be made to pre-define the location of multi jet ring assembly  7200 , such that the latter may be slid over tip section and is firmly placed on it. In embodiments, a shallow groove in the tip cover may be made to ensure multi jet ring assembly  7200  may not protrude from outer portion of tip cover and increase the outer diameter of the tip section. 
     Multiple holes  7202  are thus placed on peripheral groove  7204 , which are aligned with one or more side jet openings of the endoscope. In various embodiments, multi jet ring assembly  7200  may be adapted for different types of scopes that have at least one side jet channel, including scopes having one front service channel and scopes having two front service channels. In different embodiments, multi-jet ring assembly  7200  may be adapted to scopes with tip sections of different diameters ranging from 5 to 18 millimeters. 
     The number of multiple holes  7202  may vary in accordance with different embodiments of the specification. Opening angles of multiple holes  7202  may also vary with embodiments. In an embodiment, multiple holes  7202  may be at acute angles relative to the long dimension of the endoscope. In another embodiment, multiple holes  7202  may be at 90 degrees relative to the long dimension of the endoscope. In yet another embodiment, multiple holes  7202  may be at obtuse angles relative to the long dimension of the endoscope. In another embodiment, each hole of multiple holes  7202  may be at angles that are a combination of one or more acute angles, 90 degrees angles, and one or more obtuse angles. Acute angles of exit may enable fluid to be expelled in the direction of movement of the endoscope while obtuse angles of exit may enable fluid to be expelled in a direction opposite to the direction of movement of the endoscope, thereby aiding the endoscope movement within a body cavity, and vice versa. 
     In embodiments, the diameter of each hole in multiple holes  7204  may range within 0.40 to 0.80 millimeters. In embodiments, the minimum distance between two adjacent holes in multiple holes  7204  may be 0.20 millimeters. 
       FIGS.  73 ,  74 A, and  74 B  show side and perspective views of tip section  200  of an endoscope assembly, with multi jet ring assembly  7200  placed over it. Various components of tip section  200  may be similar to previously described embodiments of components with reference to  FIG.  2 A or  2 B . A tip cover  300  of tip section  200  may comprise one or more side jet openings, such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D . 
     Multi-jet ring assembly  7200  may be placed over tip cover  300  such that peripheral groove  7202  is aligned with its side jet openings, such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D . Therefore, fluid circulated through side jet openings may be conveyed through peripheral groove  7202  in the internal periphery of multi-jet ring assembly  7200 . The fluid may then exit through multiple holes  7204  on peripheral groove  7202 , providing 360-degrees vent to the fluid, around tip section  200 . 
       FIGS.  75 A and  75 B  illustrate perspective views of tip section  200  when multi jet ring assembly  7200  is detached from it, in accordance with an embodiment of an endoscope assembly. The figures show a side jet opening  610   a  of tip section  200 . In embodiments, peripheral groove  7202  of multi-jet ring assembly  7200  may be placed over side jet opening  610   a.    
     Referring now to  FIGS.  76 A and  76 B , cross-sectional views of a multi jet ring assembly  7200  placed over tip section  200  are shown, according to embodiments of endoscope assembly of the specification. The figures illustrate a side jet channel  6506  connected to a side jet opening  610   a . The first diameter  7206  and the second diameter  7208  of multi-jet ring assembly  7200  are also visible along with holes  7204 . Although the figure shows one side jet channel and opening, the specification may, in other embodiments, include multiple side jet channels and/or openings in the tip section of the endoscope assembly. 
     Referring now to  FIG.  2 A  and  FIGS.  65 A through  65 D , in an embodiment, a jet distributer is provided to supply fluids to each of the side jet openings, such as  605   a ,  605   b ,  610   a ,  610   b  in the multi jet endoscope tip  6501  of  FIGS.  65 A through  65 D , and the front jet  344 . The jet distributer typically comprises three fluid channels to provide fluid to the front jet  344 , right-side-jets  605   a ,  610   a  and left-side-jets  605   b ,  610   b  in the endoscope tip  6501 .  FIG.  77 A  illustrates a multi jet distributer pump  4000 , in accordance with an embodiment of the present specification. As illustrated, the multi jet distributer  4000  comprises a distributer motor housing  4002  and a distributor motor  4004  coupled with a motor shaft  4006  which in turn is coupled with a distributer disc  4008  adapted to channel fluid out into three exiting fluid pipelines  4010 ,  4012 , and  4014 , thereby supplying fluid to three jet openings (front-jet  344 , right-side-jets  605   a ,  610   a  and left-side-jets  605   b ,  610   b ) in the endoscope tip. The multi jet distributer  4000  further comprises an entering fluid pipeline  4016  that transports fluid from a fluid source, via a conventional jet pump, into the multi jet distributer  4000 . Locking element  4018  enables the distributer disc  4008  to be latched on to the motor shaft  4006 . 
     In one embodiment, jet distributer  4000  comprises two fluid channels to provide fluid to the front jet  344  and sides-jets  605   a ,  605   b ,  610   a ,  610   b  in the endoscope tip. The multi jet distributer  4000  comprises a distributer motor housing  4002  and a distributor motor  4004  coupled with a motor shaft  4006  which, in turn, is coupled with a distributer disc  4008  adapted to channel fluid out into two exiting fluid pipelines, thereby supplying fluid to three jet openings in the endoscope tip. In this embodiment, the two sides-jets are fed by a common jet channel split into two pipelines upon entering the endoscope tip; one provides fluids to the right-side-jets and the other to the left-side-jets. 
       FIGS.  77 B and  77 C  illustrate additional views of the multi jet distributer pump  4000 , in accordance with embodiments of the present specification. As illustrated in  FIG.  77 C , the distributer disc  4008  is physically detachable from the distributer motor housing  4002  and can be latched in, and out, of the distributor motor housing  4002  by using the locking element  4018  which is fitted in a groove  4020  of the distributor disc  4008 . 
     In one embodiment, the distributer disc  4008  is a substantially cylindrical structure comprising a plurality of circular slots for attaching with fluid pipelines. In an embodiment, the distributor disc  4008  comprises a slot for attaching with an entering fluid pipeline  4016  which has a diameter ranging from approximately 1 to 20 millimeters, and more specifically between 1 to 10 millimeters. In an embodiment, the distributor disc  4008  further comprises at least two slots for attaching with exiting fluid pipelines, each having a diameter ranging from approximately 1 to 20 millimeters, and more specifically between 1 to 10 millimeters. The circular slots on the face of the distributor disc  4008  attaching with the fluid pipelines are separated by a minimum distance. In an embodiment, the length of the entering and exiting pipelines is selected to minimize the overall space requirements of the distributor pump, yet achieve the fluid rate objectives of the present invention as described below. Also, in an embodiment, the fluid pipelines are connected to the distributor disc  4008  by using sealing members such as an O-ring or a gasket. During use, fluid pipelines are threaded and secured via threading onto the distributor disc  4008  and sealed thereto, using the sealing members. In an embodiment, the three exit pipelines connect to, or mate with, complementary fluid channels, which direct fluid through to the jet openings in the endoscope tip, via a main connector. In an embodiment, a universal luer connector is used to connect the fluid pipelines to the main connector. In other embodiments, any suitable connecting element may be used to connect the fluid pipelines to the main connector. 
     Three of the pipes which are positioned normal to the face of the distributor disc are exiting fluid pipelines  4010 ,  4012 , and  4014  and operate to supply fluid to three jet openings in an endoscope tip. The fourth pipe which is positioned normal to the face of the distributor disc is an entering fluid pipeline  4016 . 
     In various embodiments, a distributor disc rate within the multi jet distributer  4000  can vary from 30 rounds per minute to 100 rounds per minute, and more specifically between 50-65 rounds per minute. The distributor disc rate may also depend upon a fluid flow rate received into the multi jet distributor. 
     In an embodiment, a first pipeline supplies fluid to a front panel of the endoscope, a second pipeline supplies fluid to one side of the tip, and a third pipeline supplies fluid to the other side of the tip. In another embodiment, only two pipelines enter the main connector, wherein a first pipeline supplies fluid to the front jet and a second supplies fluid to the side jets of the endoscope. 
       FIG.  78 A  illustrates a distributer disc  4008  of a multi jet distributer, in accordance with an embodiment of the present specification. The disc  4008  comprises a distributer rotating plug  5002  for connecting the disc  4008  to the motor shaft  4006 . A locking element  4018  may be fitted in a groove  5004  on the disc  4008  to connect the disc to the motor shaft  4006 .  FIG.  78 B  illustrates another view of the distributer disc  4008  of a multi jet distributer, in accordance with an embodiment of the present specification, showing three exiting fluid pipelines  4010 ,  4012  and  4014  and one entering fluid pipeline  4016 . 
       FIG.  79 A  is a block diagram illustrating the connection between a multi jet distributor and an endoscope, in accordance with an embodiment of the present specification. A pump, such as jet pump  6002  pumps fluid from a fluid source, via an entering fluid pipeline  6004 , into a multi-jet distributor  6006 . The fluid is supplied by the multi jet distributor  6006  to three jet openings in a tip of an endoscope  6008  via three exiting fluid pipelines  6010 ,  6012  and  6014  and a main connector  6016 . In an embodiment, each of the three exiting fluid pipelines supplies fluid to a fluid channel of the endoscope  6008 . In one embodiment, each exiting fluid pipeline is connected to main connector by a luer connector, or by any connecting system of small-scale fluid fittings used for making leak-free connections between a male-taper fitting and its mating female part on medical instruments. The main connector is also coupled with a controller unit (or fuse box)  6018  that acts as a main control unit for the endoscope  6008 . 
     In various embodiments, in order to activate the jet and wash a lumen in a patient&#39;s body, a doctor/physician operating the endoscope is required to push a button located either on a handle of the endoscope, on a main control unit, on a fuse box or on a fuse panel of the endoscope. Once the button is pressed, the multi-jet distributer starts providing fluid at a pre-determined rate to each of the three fluid channels of the endoscope. In another embodiment, the doctor/physician may be required to push/step on a foot pedal to activate the jet-pump which provides fluid to the multi-jet distributer and at the same time activates the multi jet distributer motor. In various embodiments, the operating doctor/physician may change a rate of flow of fluid being supplied by the multi jet distributer dynamically during the operation. 
     In an embodiment, the multi jet distributor is located outside the endoscope system but is connected to a main control unit or the fuse box of the endoscope as illustrated in  FIG.  79 A . The multi jet distributer may connect to the fuse box by using a coupling system. In accordance with an embodiment of the present specification, the coupling system comprises a hanger plug and socket pair such that the hanger plug is integrally formed on a distributor disc portion of the multi-jet distributor while the hanger socket, to removably yet fixedly receive the hanger plug, is affixed to a side of the fuse box  6018 . 
     In various embodiments, alternate connection systems that are easily connected/disconnected but securely fixed may be used. For example, the connection system may include a magnetic coupling pair where a first magnet is fixed to the multi-distributor jet and a second magnet, having polarity opposite to the first, is affixed to a side of the fuse box. Bringing the first magnet close to the second would result into a strong magnetic coupling to enable the multi jet distributor to be removably, yet securely, attached to the fuse box. 
     Additional examples may include clips, snaps, clasps, hooks, a female/male attachment pair, and other connection systems that enable removable, yet firm, coupling as would be advantageously evident to persons of ordinary skill in the art 
     In another embodiment, the multi-jet distributer is integrated into the control unit, such that the housing of the multi jet distributor is located inside the control unit. 
       FIG.  79 B  is a block diagram illustrating another connection between a multi jet distributor and an endoscope, in accordance with an embodiment of the present specification. As illustrated, the multi-jet distributor  6006  supplies fluid to three jet openings in a tip of an endoscope  6008  via a single exiting connector housing within the three pipelines exiting pipeline  6020 . Hence, in the embodiment illustrated in  FIG.  79 B , a single fluid pipeline supplies fluid to the three fluid channels of the endoscope  6008 . 
       FIG.  80 A  illustrates a sectional view of a distributor disc of a multi jet distributor, in accordance with an embodiment of the present specification. A jet pump  7002  pumps a fluid via an entering fluid pipeline  7004  into a distributor disc  7006 , which in turn distributes the fluid into three streams being pumped out via three exiting fluid pipelines  7008 ,  7010  and  7012  (not shown in  FIG.  80 A ) into a main connector  7014 .  FIG.  80 B  illustrates another sectional view of a distributor disc of a multi jet distributor, in accordance with an embodiment of the present specification. The distributor disc  7006  comprises an inlet for an entering fluid pipeline  7004  and three outlets for exiting fluid pipelines  7008 ,  7010  and  7012 . It should be appreciated that the exiting fluid pipelines can number one, two, three, four or more. 
     In accordance with an aspect of the present specification, a multi jet controller is used to enable the main connector  6016  of  FIGS.  79 A and  79 B  to allow selective ejection of fluid from front and/or side jets of the endoscope  6008 . 
       FIG.  81 A  shows a perspective view of a main connector  8100  employing a multi jet controller  8130  in accordance with an embodiment of the present specification. The controller  8130  comprises a shaft  8105  leading to a valve  8110 . The valve  8110 , when inserted/placed in a controller housing  8115 , operatively connects the valve  8110  to the main connector  8100  via a jet connector  8120 . The jet connector  8120  connects a jet pump to the main connector  8100 . The main connector  8100  comprises a light guide pin  8125 , gas channel  8135  and an electric connector  8140  at one end and a connector  8145  at another end to connect to a main control unit (such as unit  199  of  FIG.  1 A ) through a utility cable/umbilical tube. An endoscopic water bottle connector  8150  is also provided on a side of the main connector  8100 . 
     In accordance with an embodiment, the multi jet controller  8130  has a screw formed on the valve  8110 . Once the shaft  8105  is inserted/placed in the controller housing  8115 , a rotation of the screw, with the help of the shaft  8105 , enables a selective flow of jet fluid into the selected front and/or side jet channels. Thus, the multi jet controller  8130  provides a user with a manual control option to control the operation of the varied jets (front and side jets). 
     In a first control option only the front jet receives fluid to be ejected through a front jet opening of an endoscope, such as opening  344  of  FIGS.  2 A,  2 B .  FIG.  81 B  shows a first position of the shaft  8105  corresponding to the first control option. 
     In a second control option the front jet as well as the side jets receive fluid to be ejected through a front jet opening as well as side jet openings of the endoscope, such as openings  605   a ,  610   b  of  FIG.  65 A .  FIG.  81 C  shows a second position of the shaft  8105  corresponding to the second control option. 
     In accordance with an aspect, the shaft  8105  has indicative signs to indicate to the user the chosen fluid control option.  FIGS.  81 B and  81 C  respectively, show signs or indicators  8155  and  8160  corresponding to the first and second fluid control options. 
     According to some embodiments, one technical problem addressed by the present specification relates to multiple endoscope configurations being required for handling the multiplicity of applications. Different configurations may require different type, number, positioning, directing, focusing or other tuning of the capturing devices, light sources or other components on the endoscope. Therefore, although multiple parts of an endoscope system may be common to many of the configurations, multiple endoscopes may be required. This poses significant requirements on a health institute, including for example financial requirements, storage, maintenance, training or the like. 
     Some different configurations may also be required for different patients or patient types, such as adults, children, infants, or the like. 
     Some different configurations may also be required for different procedures, such as colonoscopy, gastroscopy, endoscopic ultrasound (EUS), endoscopic retrograde cholangiopancreatography (ERCP) or the like. 
     Yet another technical problem addressed by embodiments of the disclosure relates to maintenance costs. When replacing the camera head, for example due to defective objective lens, the entire colonoscope has to be disassembled, which is an expensive process. 
     According to some embodiments, a technical solution may be the provisioning of an endoscope having a removable tip section. The tip section may also be partially removable, for example, with a permanent section and a removable section. The removable section of the tip may be removably connected or attached to the permanent section of the tip which is connected to a shaft (which may also be referred to as a bending section, for example, a vertebra mechanism), so that endoscopes having different configurations can be used with the same system. According to the endoscopic task to be performed, a removable section having an appropriate configuration is selected and connected to the shaft or to the permanent section. When the endoscopy session is over, the removable section of the tip may be removed and another removable section having the same or a different configuration can be connected to the permanent section or to the shaft. 
     In some embodiments, the removable section of the tip comprises a substantially full cross section of the tip, for example, the whole distal surface of the tip, possibly excluding some openings or small parts such as rings. In some of these embodiments, all channels and flows going through the tip, such as optic fibers, power supply, water supply, data lines transferring images, working channels for transferring equipment, or the like, are made of at least two parts which may be connected when the removable section is attached to the permanent section. However, in other embodiments of the full cross section removable sections, there may still be some materials or equipment which make their way only through the permanent section, which has one or more protruding parts going into and through the removable section. 
     In other embodiments, all cross sections of the removable section are substantially partial to the cross sections of the tip, such that at least one of the channels going through the tip is not split and is fully contained within the permanent section. 
     It will be appreciated that when the removable section is attached to the permanent section, all channels and flows which are split between the permanent section and the removable section are securely connected such that no tool, material or energy may leak between the parts, and that all data may be continuously transferred. 
     In some embodiments, the removable section may be attached to the permanent section in a secure manner which will ensure that the removable section will not mistakenly disconnect from the permanent section within the body. A verification mechanism may be provided which adds extra security measures. 
     One technical effect of embodiments of the disclosed subject matter relates to providing an endoscope with a removable tip section. This enables the medical staff to replace the tip section of the endoscope in accordance with the required functionality, so as to use for each type of endoscopic session the most suitable endoscope configuration, equipment, size, or the like. Different removable sections may then be used according to varying needs, thus eliminating the need for purchasing and maintaining multiple endoscopes for different applications. Thus, different removable sections may be of different configurations, for example, having the image capturing components, light sources, or working/service channels located at different locations on the removable section, thus adjusting to the specific body cavity explored or to possible findings within the body cavity. In other embodiments, the relative location between the image capturing components and the light sources may differ. In yet other embodiments, different removable sections may contain different types of cameras, differing for example in their wave length, lens assembly, sensor or other parts, pointing directions, field of view, or other parameters. The light sources may also differ between different configurations, in order to provide the type of light which the used sensor is sensitive to. Different removable sections can be made to adjust to different patients, for example removable sections can be manufactured in different sizes for adults, children or infants. Different removable sections can also be used when different view fields, different viewing angles or different optical characteristics are required, for example, in some situations a viewing angle of 170° may be used, while in situations that require viewing more details of a smaller area, a viewing angle of 140° can be used. 
     Another technical effect of the disclosed subject matter, according to some embodiments, relates to providing a disposable removable section, thus eliminating the need for sterilization or reprocessing and reducing contamination risks. 
     Yet another technical effect of the disclosed subject matter, according to some embodiments, relates to providing a removable section which can be made personalized in order to provide good results for a particular patient. 
     Yet another technical effect of the disclosed subject matter, according to some embodiments, relates to the replaceable top enabling a health care facility to maintain only a small number of endoscope systems, thus reducing cost and maintenance, while using the most appropriate endoscope for each type of endoscopic session, each patient, or the like. 
     Reference is now made to  FIG.  82   , which shows a perspective view of a removable tip endoscope. 
     Endoscope  8200  may include an elongated shaft, a bending section and a tip section  8201  which terminates the endoscope. The bending section may enable the turning of tip section  8201  in different directions. Tip section  8201  may comprise a removable section  8202  and a permanent section  8207  connected along line  8203 . 
     Removable section  8202  may include therein a front-pointing capturing device such as a camera or a video camera  8204  which may capture images through a hole in a distal end surface  8206  of tip section  8201 . A discrete front illuminator  8208 , which is optionally a light-emitting diode (LED), may be associated with front-pointing camera  8204  and used for illuminating its field of view through another hole in distal end surface  8206 . The LED may be a white light LED, an infrared light LED, a near infrared light LED or an ultraviolet light LED. The light may be generated internally within endoscope tip section  8201 , or generated remotely and transferred, for example, by a fiber optic. In some embodiments, removable section  8202  may comprise two or more illuminators, wherein at least one may generate the light internally, and at least one may provide remotely generated light. 
     A front fluid injector  8210  may be used for cleaning at least one of front-pointing camera  8204  and discrete front illuminator  8208 . Front fluid injector  8210  may be slightly elevated from distal end surface  8206 , to enable it to inject fluid, from its side  8210   a , onto front-pointing camera  8204  and discrete front illuminator  8208 . Front fluid injector  8210  may be configured to inject fluids such as water, air and/or the like. 
     Distal end surface  8206  may further include a hole defining a working channel  8212 . Working channel  8212  may be a hollow tube configured for insertion of a surgical tool to operate on various tissues. For example, miniature forceps may be inserted through working channel  8212  in order to remove a polyp or sample of which for biopsy. In alternative embodiments, working channel  8212  can be used for applying suction for evacuating various liquids and/or solids which exist in the body cavity and interfere with the inspection. In some embodiments, opening  8212  can extend to an internal cylinder which comprises a part of permanent section  8207 . It should be appreciated that in various embodiments, the distal end surface  8206  may include more than one working/service channel openings. 
     A pathway fluid injector  8214 , defined by another hole in distal end surface  8206 , may be used for inflating and/or cleaning the body cavity into which endoscope  8200  is inserted. Inflation may be performed by flowing air or another gas through pathway fluid injector  8214 , and may be beneficial for cases in which the body cavity, such as the colon, is shriveled or otherwise does not allow for efficient inspection. Cleaning may be achieved, for example, by injecting a liquid, such as water or saline, on an unclean area of the body cavity. Furthermore, pathway fluid injector  8214  (or a different tube) may be used for applying suction, in order to evacuate various liquids and/or solids which exist in the body cavity and interfere with the inspection. 
     Permanent section  8207  of tip section  8201  may include therein a side-pointing camera  8216  which may capture images through a hole in a cylindrical surface  8205  of the permanent section  8207  of tip section  8201 . A side illuminator  8222 , which is optionally similar to front illuminator  8208 , may be associated with side-pointing camera  8216  and used for illuminating its field of view through another hole in cylindrical surface  8205 . A side fluid injector  8220  may be used for cleaning at least one of side-pointing camera  8216  and discrete side illuminator  8222 . In order to prevent tissue damage when cylindrical surface  8205  of permanent section  8207  contacts a side wall of the body cavity, side fluid injector  8220  and side-pointing camera  8216  may be located in a notch  8218  in the cylindrical surface. This way, side fluid injector  8220  may be elevated from depression  8218  but still not significantly protrude from the level of cylindrical surface  8205 . The elevation of side fluid injector  8220  may enable it to inject fluid, from its opening  8220   a , onto side-pointing camera  8216 . In an alternative configuration (not shown), one or more discrete side illuminators may also be included in the depression, so that fluid injected from the side fluid injector may reach them. In yet another configuration (not shown), a side-pointing camera, one or more side illuminators and a side fluid injector may not be located in a depression, but rather be on essentially the same level as the cylindrical surface of the tip section. 
     It will be appreciated that the division of tip section  8201  into removable section  8202  and permanent section  8207  shown in  FIG.  82    is schematic only and is intended as a general demonstration. The cameras, working channels, illumination channels, fluid injectors and other components may be split between removable section  8202  and permanent section  8207  in any other manner as demonstrated in the exemplary embodiments detailed in association with FIG.  83  to  FIG.  86    below. For example, in some embodiments, the removable or permanent section may include one or more side working/service channels. In still further embodiments, the removable or permanent section may include a plurality of side jet openings (such as  605   a ,  605   b ,  610   a ,  610   b  of  FIGS.  65 A through  65 D ). 
     It will be appreciated that further flexibility may be provided if any of the capture devices (such as cameras), working/service channels, illumination channels and other components are provided on the removable section rather than on the permanent section. In such arrangements, each removable section is configured and equipped with the camera types and other equipment and arrangement which are most appropriate for the task. However, some equipment, such as cameras of higher quality and price, may be located on the permanent section, so as to better utilize such resources in multiple application types. 
     Reference is now made to  FIG.  83   , which shows a perspective view of a substantially full cross section of a removable tip removed from the permanent section, in accordance with one embodiment of the present specification. 
     Removable section  8302  of a tip of an endoscope is shown removed from permanent section  8307 , wherein permanent section  8307  is connected to a shaft. 
     Removable section  8302  may comprise one or more capture devices, for example, video camera  8304 , one or more light sources such as light source  8328 , or one or more fluid injectors, such as  8332  or  8336 . 
     One or more cables providing power to camera  8304  and transferring images from camera  8304  to the shaft go through removable section  8302 , into and through an elongated section  8308  protruding from removable section  8302 . When removable section  8302  is connected to permanent section  8307 , elongated section  8308  enters a corresponding recess  8312  in permanent section  8307 . In some embodiments, elongated section  8308  may end with a connector, wherein recess  8312  contains a corresponding connector, such that when elongated section  8308  is entered into recess  8312 , the two connectors connect such that power or data can flow between the endoscope and camera  8304 . For example, a plug located at the end of elongated section  8308  may enter a corresponding socket inside recess  8312 . In alternative embodiments, recess  8312  may comprise a plug and elongated section  8308  may comprise a socket. 
     Thus, electric signals or data may pass through elongated section  8308  and recess  8312  from the shaft to the camera. 
     In some embodiments, elongated section  8308  may protrude from permanent section  8307  while recess  8312  may be placed on removable section  8302 . 
     It will be appreciated that removable section  8302  or permanent section  8307  may comprise additional one or more pairs of protruding sections and corresponding channels, for transferring water or other fluids or liquids, optic fibers or any other material or equipment. When the protruding sections and corresponding channels are used for transferring fluids or liquids, one or two of them may be constructed with gaskets for sealing the fluids or liquids and avoiding leakage into the body or into other parts of the endoscope tip, from a gap between removable section  8302  and permanent section  8307 . 
     Permanent section  8307  may also comprise a hollow elongated section  8316  protruding therefrom containing channel  8320 . When removable section  8302  is connected to permanent section  8307 , hollow elongated section  8316  is inserted into a corresponding channel  8324  in removable section  8302 , which extends through the entire length of removable section  8302 , thus enabling a surgical tool to pass through a working channel extending from the shaft through channel  8320  of hollow elongated section  8316  and through channel  8324  in removable section  8302  to distal surface  8305  of removable section  8302 , so that the surgical tool can be used for operating on the body cavity of the patient. 
     Removable section  8302  may also comprise one or more side-pointing capturing devices such as camera  8338 , one or more light sources  8340  or one or more fluid injectors  8344 . The utilities to camera  8338 , light source  8340  or injector  8344 , may be received from the same provisioning as the front facing camera, light sources and injectors, through corresponding pipes within the body of removable section  8302  around channel  8324 . The images captured by camera  8338  may also be transferred through the same channels. 
     It will be appreciated that removable section  8302  or permanent section  8307  may comprise additional side pointing cameras, light sources or injectors. 
     Removable section  8302  and permanent section  8307  may be connected by any known mechanism, such as a locking mechanism, fastening mechanism, snap mechanism, or the like. 
     Removable section  8302  or permanent section  8307  may be equipped with a button  8352  for releasing the connection. In order to avoid harming the body cavity of the user, button  8352  may be placed within a recess so as not to protrude from the surface of the tip section. In some embodiments, the connection may only be released if a corresponding command is provided from an external source, such as simultaneously clicking on a control on display  120  of  FIG.  1 A  which may be translated to an electrical or mechanical effect required for releasing the connection, in order to prevent unwanted accidental release. 
     In some embodiments, permanent section  8307  may comprise a button or another sensitive area such as switch  8348  which may be touched or pressed by removable section  8302 , only when removable section  8302  is securely connected to permanent section  8307 . Such button may also be electrically connected to the endoscope handle or controller and may provide an indication to the endoscope operator whether the parts are securely connected. The indication may be visual, such as an icon on display  120 . In some embodiments, when the connection is released, a vocal indication may also be provided as well to alert the operator. 
     In some embodiments, there may be two degrees or two mechanisms of connection between removable section  8302  and permanent section  8307 . If one degree or one mechanism is released while the endoscope is being used, the operator may receive a first alert so he or she can remove the endoscope or otherwise correct the situation before the removable section is released within the body cavity of the patient. 
     It will be appreciated by a person skilled in the art that if the endoscope comprises an optic fiber, then each of removable section  8302  and permanent section  8307  may comprise a part of the fiber, wherein the sections may comprise corresponding lenses for providing continuity between the fiber parts by transferring light. 
     Reference is now made to  FIG.  84   , which shows a perspective view of a substantially full cross section removable tip section attached to the permanent section, in accordance with one embodiment of the present specification. 
     In  FIG.  84   , removable section  8302  is fully connected to permanent section  8307 , such that elongated section  8308  and hollow elongated section  8316  of  FIG.  83    are inserted into corresponding recess  8312  and channel  8324 , respectively. Electric signals or energy as well as water or fluids may pass through permanent section  8307  to removable section  8302 , and images captured by the cameras are transferred back and may be displayed to an operator. 
     Reference is now made to  FIG.  85   , which shows a perspective view of a partial cross section removable tip section in accordance with one embodiment of the present specification. 
     In  FIG.  85   , distal face  8305  of the endoscope tip is comprised of two parts, wherein a first part  8305 ′ of distal face is of permanent section  8507 , while the other part  8305 ″ is of removable section  8502 . Thus, each cross section of removable section  8502  comprises a partial cross section of the tip section, when assembled, of the two sections. In the exemplary embodiment of  FIG.  85   , channel  8320 ′ fully contained within permanent section  8507  forms a working channel and reaches through permanent section  8507  to the distal face so that tools or other equipment can be passed. 
     Removable section  8502  may be equipped with cameras  8304  or  8338 , light sources  8328  or  8340 , or one or more fluid injector  8332 ,  8336  or  8344  which may be located at the front face or on the side face of removable section  8502  as required. The cameras, light sources or fluid injectors may be implemented and receive utilities as detailed in association with  FIG.  8    above. 
     Removable section  8502  may also comprise one or more elongated sections such as elongated section  8308 ′ which fits into recess  8312 ′ of permanent section  8507 . The one or more elongated sections, such as elongated section  8308 ′, may function as an anchoring mechanism to secure removable section  8502  within permanent section  8507 . Alternatively or additionally, the one or more elongated sections, such as elongated section  8308 ′, may be used for transferring electric energy, fluids, liquids, optic fibers or other equipment or materials between removable section  8502  and/or surface  8305 ″ and the endoscope handle and/or console. 
     In order to provide for full and tight connection between removable section  8502  and permanent section  8507 , removable section  8502  may comprise a trapeze shaped bulge which fits into recess  8544  of permanent section  8507 . In alternative embodiments, removable section  8502  may comprise a recess and permanent section  8507  may comprise a bulge. 
     Permanent section  8507  and removable section  8502  may be connected in any required manner as detailed in association with  FIG.  83    above. 
     Reference is now made to  FIG.  86   , showing a perspective view of a partial cross section removable tip section attached to the permanent section in accordance with one embodiment of the present specification. 
     When removable section  8502  is securely attached to permanent section  8507 , first part  8305 ′ of the tip section distal face, which is part of removable section  8502 , and second part  8305 ″ of the tip section distal face, which is part of permanent section  8507 , are substantially on the same plane with minimal or no gap therebetween, and complement each other to create the full distal face of the tip section. When removable section  8502  and permanent section  8507  are securely attached, switch  8348  of  FIG.  85    may be pressed to provide an indication to an operator of the endoscope. Removable section  8502  and permanent section  8507  may be released by pressing button  8352 , with or without providing an external release command. 
     When removable section  8502  is securely attached to permanent section  8507 , utilities and equipment may be passed through a working channel formed by channel  8320 ′ and through elongated section  8308 ′ and corresponding channels in permanent section  8507 . 
     According to an aspect of some embodiments, there is provided an interface unit configured to functionally associate with an endoscope system which comprises at least two simultaneously operating imaging channels associated with at least two displays, respectively. 
     The multi-camera endoscope of the present specification may typically provide the image data collected by the cameras simultaneously, whereas image data from each camera is delivered by an imaging channel associated exclusively with one camera, respectively. Imaging channels may be physical such as distinct video cables, each video cable being exclusively associated with one camera. Imaging channels may also be virtual, image data from each camera being uniquely coded prior to transfer through a single physical channel common to all cameras—such as a single video cable—and decoded at the output of the physical channel, thus discriminating the image data from each camera. The image data from each imaging channel may be displayed simultaneously to the physician on a display or on several displays. A display, or several such displays, may be associated exclusively with only a single imaging channel. 
     According to some embodiments, each imaging channel is associated exclusively with a physical display such as a video screen. The endoscope may comprise, e.g. three cameras, a first camera pointing forward substantially along the axis of the unbent probe, and the second and third cameras pointing sidewise from that axis, the second camera across from the third camera. According to some embodiments, each of the three respective imaging channels may be associated with a video screen, wherein the screens are arranged side by side, tilted at an angle relative to each other, substantially along an arc, to form a panoramic view for the physician. Image data from the first camera may thus be displayed on the central screen and image data from the second and third cameras may be displayed, e.g., on the right screen and on the left screen, respectively, thus providing to the physician a more realistic view of the surroundings of the tip of the probe over a wider solid angle. 
       FIGS.  87 A and  87 B  depict schematically an endoscope system  10  and an interface unit  8700  associated with endoscope system  10 , according to an aspect of some embodiments. Endoscope system  10  comprises an endoscope  20 , a main controller  30  (which may be similar to the main control unit  199  of  FIG.  1 A ) connected to endoscope  20  by a utility cable  32  (also referred to as an umbilical tube) and at least two screen displays  40   a , and  40   b , respectively, functionally associated with main controller  30 . Endoscope  20  comprises a handle  22  and a distal tip  24  housing at least two cameras  26   a  and  26   b , respectively, as depicted schematically in  FIG.  87 B . 
     Cameras  26   a  and  26   b  are configured to collect still images and video images according to a mode of operation selected by a user of endoscope system  10 . Cameras  26   a  and  26   b  are associated with respective imaging channels  50   a  and  50   b , implemented by two video cables included within utility cable  32 . Each imaging channel transfers image data from a respective camera in endoscope  20  to main controller  30 . Main controller  30  processes independently image data transferred by each of the imaging channels, for displaying images corresponding to the image data, on screen displays  40   a  and  40   b , respectively. Main controller  30  processes the image data for display, e.g. using frame grabbers (such as  60   a  and  60   b  in  FIG.  88   ), each frame grabber being associated with one imaging channel, or using any technique known in the art for processing image data received from a camera for displaying a corresponding image. Thus, screen display  40   a  is associated exclusively with imaging channel  50   a  and therethrough with camera  26   a , and screen display  40   b  is associated exclusively with imaging channel  50   b  and therethrough with camera  26   b.    
     According to some embodiments, endoscope system  10  may comprise three imaging channels, carrying image data from three cameras to three screen displays, respectively. Embodiments of endoscope system  10  comprising any number of imaging channels and corresponding cameras and screen displays are contemplated. 
     Endoscope  20  further comprises fluid injectors  28  for cleaning the optical element of camera  26   a  and/or for slightly inflating the body conduit in which the tip  24  is advanced. Utility cable  32  correspondingly comprises one or more fluid pathways  34  for passing a fluid to injectors  28 . 
     Interface unit  8700  is functionally associated with endoscope system  10  to process image data received from imaging channels  50   a  and  50   b  and to display a corresponding image on an interface unit display  8720 .  FIG.  88    schematically displays a functional block diagram of interface unit  8700  according to some embodiments. Interface unit  8700  comprises an image processor  8710  functionally associated with imaging channels  50   a  and  50   b . Interface unit  8700  further comprises interface unit display  8720 , functionally associated with image processor  8710 . Image processor  8710  is configured to process image data received simultaneously from imaging channel  50   a  and from imaging channel  50   b , and to generate images that contain image data from the imaging channels. Images generated by image processor  8710  are displayable on a single display. Thereby, interface unit  8700  is configured to display on interface unit display  8720  images that include image data received substantially simultaneously from imaging channels  50   a  and  50   b.    
     According to some embodiments, image processor  8710  comprises a synchronization module  8730 . Synchronization module  8730  is configured to generate synchronization signals to synchronize image data received through imaging channels  50   a  and  50   b . For example, in some embodiments, cameras  26   a  and  26   b  may each comprise a sensor, such as but not limited to a charge-coupled device (CCD) for image capturing. In some embodiments, synchronization module  8730  synchronizes image data received through imaging channels  50   a  and  50   b  by generating a common clock signal and driving the CCD in camera  26   a  and the CCD in camera  26   b  with the common clock signal. In some embodiments, synchronization module  8730  synchronizes image data received through imaging channels  50   a  and  50   b  by generating an initiating synchronization signal initiating the scan in the CCD of camera  26   a  and in the CCD of camera  26   b  at the same instant. 
     According to some embodiments, image processor  8710  is configured to simultaneously receive incoming video streams from imaging channels  50   a  and  50   b  and to generate from the two incoming video streams a single video stream displayable on interface unit display  8720 . According to some embodiments, reduced-size images corresponding to each video stream incoming from imaging channels  50   a  and  50   b  respectively, are simultaneously displayed on interface unit display  8720 . According to some embodiments, the two reduced-size images corresponding to imaging channels  50   a  and  50   b  are displayed on interface unit display  8720  side by side on one level horizontally. According to some embodiments, the two reduced-size images are arranged on interface unit display  8720  vertically, substantially one on top of the other. According to some embodiments, image processor  8710  is configured to generate a single video stream from the two incoming video streams substantially in real time. 
     According to some embodiments, image processor  8710  and interface unit display  8720  are encased together with main controller  30 . According to some embodiments, image processor  8710  is encased together with main controller  30  and interface unit display  8720  is encased in a different case. According to some embodiments, interface unit display  8720  is connected with cables to image processor  8710  and, in embodiments in which image processor  8710  is encased together with main controller  30 , interface unit display  8720  is substantially portable within a limit imposed by the cables. According to some embodiments, interface unit display  8720  is functionally associated with image processor  8710  wirelessly. According to some embodiments, image processor  8710  is assembled at a desired location along endoscope  20  between tip  24  and main controller  30 , e.g. inside handle  22 . 
     According to some embodiments, interface unit  8700  further comprises an interface unit computer  8750 , functionally associated with image processor  8710 . According to some embodiments, interface unit computer  8750  is configured to operate a files managing system comprising a files storage module  8760 . For example, interface unit computer  8750  may be a personal computer running a commercially available operating system and comprising a primary storage module (e.g. RAM) and a secondary storage module (e.g. HDD). According to some embodiments, interface unit computer  8750  is configured to generate digital files of images generated by image processor  8710  and to store such files in files storage module  8760 . Generating a file from an image or from a series of images or from a video stream may be accomplished using a suitable, possibly commercially available, computer application. 
     According to some embodiments, interface unit computer  8750  comprises a communication channel having a communication interface port  8770  configured to allow communication between interface unit computer  8750  and a computer network. According to some embodiments, a suitable communication channel may employ standard LAN connector and correspondingly suitable cables, and additionally or alternatively a wireless connection using a WiFi protocol, or any other suitable technique for communication between a computer and a computer network known in the art. According to some embodiments, communication interface port  8770  comprises a video output, e.g. S-video or composite. According to some embodiments, communication interface port  8770  comprises a high definition video output, e.g. HDMI. 
     According to some embodiments, interface unit computer  8750  is configured to transfer files generated and stored within interface unit computer  8750  to a network computer or another suitable network device using the communication channel and communication interface port  8770 . According to some embodiments, files from interface unit computer  8750  may be stored in a network computer, and files may be retrieved to interface unit computer  8750  through communication interface port  8770  and associated communication channel. According to some embodiments, communication interface port  8770  may be used to store, in a network computer, a video stream in real time. According to some embodiments, communication interface port  8770  may be used to store, in a network computer, captured still images. According to some embodiments interface unit computer  8750  may employ communication interface port  8770  for communication with a local network, such as a local computer network in a hospital or in a medical care facility, for storing files with the network and retrieving files therefrom. According to some embodiments, interface unit computer may communicate using communication interface port  8770  with an Electronic Medical Records (EHR) application for storing and retrieving files, video streams, capture images and other desired medical records, during an endoscopy procedure. Such an EHR application may be accessed, according to some embodiments, through a local network and, according to some embodiments, through the Internet. According to some embodiments, interface unit  8700  is compatible with an EHR application capable of recording a single video stream using a video interface such as S-video, composite or a High-Definition video interface as described above. According to some embodiments, communication interface port  8770  may additionally comprise a standard communication port (COM port) of interface computer  8750 , for interfacing with a respective serial port in a network computer. 
     In operation during an endoscopy procedure, it is sometimes desired to record a single video frame as a still image. For example, the physician may advance the endoscope in a body conduit while video images are continuously recorded. When the physician identifies a site of particular interest—for example a local tumor in the body conduit—the physician may wish to take a still image of the tumor. Endoscope system  10  comprises an imaging switch  8780 , the activation of which commands image processor to freeze the video display on displays  40   a  and  40   b  and on interface unit display  8720 . Activation of imaging switch  8780  further commands storing the frozen images on displays  40   a  and  40   b  to an EHR system through communication interface port  8770 . When imaging switch  8780  is activated, image processor  8710  generates, for a pre-determined time period T, which may be for any time period but is preferably between 0.25 and 1 second, a video stream comprising substantially a single image that is the image which is frozen on display  40   a . Subsequently, when the pre-determined time period T ends, a second single image is generated by image processor  8710 , which is the frozen image on display  40   b . Thus, stills images of a particular site of interest selected by the physician during an endoscopy procedure may be stored sequentially, as an integral part of a video stream communicated from endoscope system  10  to an EHR system through communication interface port  8770 . Such still images may also contain textual or other identification data inserted thereon by imaging processor  8710 , identifying each image as corresponding to camera  26   a  (and display  40   a ) or to camera  26   b  (and display  40   b ). 
     Thus, according to some embodiments, interface unit  8700  is configured to receive through two (or more) imaging channels  50   a  and  50   b , two (or more) video streams associated with two (or more) views generated by endoscope  20 . In one embodiment, the interface unit integrates with the hospital system using a protocol such as TCP/IP or file transfer. In another embodiment, the interface unit  8700  does not integrate with the hospital system using a protocol such as TCP/IP or file transfer. Rather, in one embodiment, the interface unit  8700  outputs a new video stream that is a combination of the multiple (left, center and right when there are three) video streams and which also contains additional information on the video stream. This includes patient information, if such information has been entered by the user. Interface unit  8700  is configured to generate a single video stream comprising images associated with image data in the two or more incoming video streams, and to display the single video stream on interface unit display  8720 . Interface unit  8700  is yet further configured to generate and to store, in file storage module  8760 , files associated with a single video stream generated as described above. In one embodiment, the interface unit  8700  is configured to communicate with a computer network through a communication interface port  8770  for storing a single video stream comprising images associated with the at least two views provided by endoscope  20 , whereas the single video stream is communicated to the computer network substantially in real time as an endoscopic procedure is carried out. 
     Embodiments of endoscope system  10  comprising two imaging channels as described above are provided herein as a non-limiting example only. It should be understood that an interface unit, such as interface unit  8700  and compatible, according to the teachings herein, with an endoscope system having more than two imaging channels, e.g. having three or four imaging channels or having any number of imaging channels, is contemplated. 
     In one embodiment, the interface unit is associated with an endoscope system comprising three imaging channels. The interface unit is able to receive and independently capture three separate video streams from the endoscope. In this embodiment, the interface unit is capable of recording these as separate video files (left, center, right) or capturing three separate still JPEG files (left, center, right). It does this by use of 3 distinct video capture devices, one for each incoming stream. The software included in the interface unit is able to independently control how these images or video files are recorded to hard disk. For purposes of the current embodiment, all three streams are controlled independently but are triggered simultaneously. 
     The interface unit includes an interface unit display for displaying the incoming video streams. In one embodiment, the interface unit display is a 1080p display. In one embodiment, the display includes a DVI output that can be converted to any number of other video formats using external converter devices. This stream is sent to an image management system. When the user triggers an image capture event (that is, they want to save three still images from the three independent streams), the interface unit captures and saves the images immediately. In one embodiment, the image capture event is triggered by pressing a button on the endoscope. In another embodiment, the image capture event is triggered by pressing a button on the interface unit or on the interface unit display touchscreen. The interface unit then changes its own display to display a first single still image only and sends a “footswitch” trigger pulse to the image management and documentation capture PC. In one embodiment, there is a serial data connection between the interface unit and the capture PC. The interface panel then changes its own display to display a second single still image and sends another trigger pulse to the capture PC. The process is then repeated for the third still image. As a result, full screen left, center and right individual images are put on the video stream sequentially for the image management capture PC to grab using its frame grabber. This preserves the correct aspect ratio. All of this is done transparent to the user and no additional cropping or other image manipulation is needed. 
     In one embodiment, the interface unit does not generate the image or video files itself. Rather, the image and video files are generated from the video streams by the capture PC. In another embodiment, the interface unit generates the image and video files itself. In one embodiment, the interface unit includes a file storage module. The images are saved to a hard disk drive on the interface unit. The images are organized based on the procedure number (this is automatically generated each time a capture event is triggered) and also the number in sequence that the photos were taken (2nd captured image, 3rd captured image) and also the orientation of the image (left, center, or right). In one embodiment, the video files are organized in the same manner and are also saved to a hard disk drive on the interface panel. 
     In various embodiments, other document systems, such as, Provation or Olympus EndoBase, receive the incoming video stream into their video capture cards. As mentioned above, this video signal comes from the DVI output of the interface unit and, if necessary, is converted to either a standard definition video signal (down-converted to S-Video or Composite) or to a 1080p signal using an HD-SDI protocol. This is decided by the capabilities of the video capture card that is inside the receiving documentation system computer. In one embodiment, the interface unit includes a “footswitch” type protocol that outputs from a serial communications port (COM port). This protocol involves changing the state of PIN  4  on a standard 9-pin RS-232 connection. A NULL Modem Cable (9-pin RS-232) is connected between the output COM port on the interface unit and an incoming COM port on the receiving documentation system computer. When a capture event is triggered, the interface units sends the capture PC a “footswitch” type trigger pulse (as mentioned earlier) so the capture PC can capture a frame of video from the outgoing video stream. 
     In one embodiment, the communication between the interface unit and the image management and communication system capture PC is in one direction from the interface unit to the capture PC. The interface unit does not receive information from the documentation system. In one embodiment, the interface unit does not send any data to the documentation system other than the “footswitch” type trigger pulse. 
       FIG.  89    schematically depicts a layout of an endoscope system  8810  and an associated interface unit  8900  deployed in an operating room, according to an aspect of some embodiments. A patient  8880  is supported on a bed  8882  and a physician  8884  is employing an endoscope  8820  of endoscope system  8810  in an endoscopic procedure. An assistant  8886  assists physician  8884  on the other side of bed  8882  across from physician  8884 . 
     Endoscope  8820  is connected to a main controller  8830  by a utility cable  8832 . Endoscope  8820  provides three simultaneous endoscopic views using three cameras housed in the tip of endoscope  8820 . Main controller  8830  is connected to three display screens,  8840   a ,  8840   b , and  8840   c , respectively, wherein each display screen is configured to display a corresponding view of the three endoscopic views provided by endoscope system  8810 , substantially as described above. Display screens  8840  are positioned facing physician  8884  and possibly elevated so that physician  8884  may conduct the endoscopic procedure by looking at the screen displays and having an undisturbed line of site thereto. 
     Interface unit  8900  comprises an image processor encased with main controller  8830 , and an interface unit display  8920  functionally associated with the image processor  8910 . The image processor simultaneously receives image data associated with the three views provided by endoscope  8820  from three respective imaging channels and generates images comprising image data from the three views, whereas the images are displayable on interface unit display  8920 . For example, the three cameras of endoscope  8820  may provide three incoming video streams, respectively, and the image processor may then generate a single video stream comprising image data from the three incoming video streams, substantially as described above. 
     According to some embodiments, interface unit display  8920  is functionally associated with the image processor encased with main controller  8830  by a cable. In some embodiments, interface unit display  8920  is wirelessly associated with the image processor. According to some embodiments, interface unit display  8920  is substantially portable and may be deployed in a multitude of positions within the operating room. Moreover, according to some embodiments, interface unit display  8920  may be easily displaced from position to position within the operating room during a procedure. For example, interface unit display  8920   b  or  8920   c  may be positioned so that both physician  8884  and assistant  8886  can watch the screen thereof, or interface unit display  8920   a  may be positioned facing assistant  8886 . 
     In some embodiments, interface unit  8900  comprises an interface unit computer, functionally associated with main controller  8830  and with the image processor encased therewith, and having substantially similar respective functionality to that of interface unit computer  8750  of  FIG.  88    above. 
     In some embodiments, interface unit  8900  comprises a user interface module  8922  associated with interface unit display  8920 , and assistant  8886  may employ user interface module  8922  to command interface unit  8900  and/or interface unit computer, and/or endoscope system  8810 . For example, assistant  8886  may employ user interface module  8922  to input and store, in the interface unit computer, patient-related textual information, such as relevant biographical data, before or during an endoscopic procedure. According to some embodiments, user interface module  8922  comprises a touch screen  8924 . 
     According to some embodiments, interface unit computer may communicate with a computer network, substantially as described above and using an access point  8890  installed in the operating room and allowing access to such a computer network. Access point  8890  may comprise a LAN connector to which the interface unit computer is connected through a LAN cable. According to some embodiments, access point  8890  may be a WiFi modem with which the interface unit computer may communicate wirelessly. 
     Thus, according to an aspect of some embodiments and referring simultaneously to  FIGS.  87 A through  89   , there is provided an interface unit ( 8700 ,  8900 ) configured to functionally associate with an endoscope system ( 10 ,  8810 ) which comprises at least two simultaneously operating imaging channels ( 50   a ,  50   b ) associated with at least two displays ( 40   a ,  40   b  in  FIGS.  87 A and  88   ;  8840   a ,  8840   b , and  8840   c  in  FIG.  89   ), respectively. The interface unit comprises an image processor ( 8710 ) functionally associated with the at least two imaging channels, and configured to generate images comprising image data received simultaneously from the at least two imaging channels. The interface unit further comprises an interface unit display ( 8720  in  FIGS.  87 A and  88 ,  8920    in  FIG.  89   ), functionally associated with the image processor. Images generated by the image processor and comprising image data from the at least two imaging channels are displayable on the interface unit display. 
     According to some embodiments, each imaging channel is associated with an image capturing device ( 26   a ,  26   b ), respectively. 
     According to some embodiments, the interface unit display is substantially portable. 
     According to some embodiments, the interface unit display is functionally associated with the image processor wirelessly. 
     According to some embodiments, the image capturing devices may capture video images, and the image data in each of the at least two imaging channels comprise an incoming video stream corresponding to video images. The image processor is configured to generate a single video stream displayable on the interface unit display, so that reduced-size images corresponding to each incoming video stream are simultaneously displayed on the interface unit display. According to some embodiments, the image processor is configured to generate a single video stream from the at least two incoming video streams substantially in real time. 
     According to some embodiments, the interface unit further comprises an interface unit computer ( 8750 ) operating a files managing system and comprising a files storage module ( 8760 ), wherein the interface unit computer is configured to generate and store, in the files storage module, files of images generated by the image processor. 
     According to some embodiments, the interface unit further comprises a user interface module ( 8922 ) allowing a user to command the computer. According to some embodiments, the user interface module comprises a touch screen ( 8924 ). 
     According to some embodiments, the interface unit further comprises a communication channel comprising a communication interface port ( 8770 ) configured to allow communication between the interface unit computer and a computer network at least for transferring files between the interface unit computer and the computer network. According to some embodiments, the computer network is a local computer network. According to some embodiments, the local computer network is a hospital network. According to some embodiments, the computer network is the Internet. 
     According to some embodiments, the communication channel comprises a LAN communication interface port, and operates an Internet Protocol. According to some embodiments, the communication channel comprises a WiFi communication interface port. According to some embodiments, the communication channel comprises a video/audio communication interface port, configured for outputting a video stream. According to some embodiments, the communication interface port comprises an S-video or a composite port. According to some embodiments, the communication interface port comprises an HDMI port. 
     According to some embodiments, the interface unit is configured to communicate through the communication interface port to a network computer, substantially in real time, a video stream generated by the image processor. According to some embodiments, the image processor is configured, when commanded, to capture a substantially single video frame in each of the imaging channels at the moment of the command and to communicate through the communication interface port to a network computer, a video stream comprising sequentially, still images of the single video frames wherein each such still image is included in the video stream for a pre-determined time period. 
     According to some embodiments, the interface unit further comprises a synchronization module ( 8730 ) functionally associated with at least two of the image capturing devices, and configured for generating a synchronization signal for synchronizing incoming video streams in the imaging channels corresponding to the at least two image capturing devices. 
       FIG.  90    details how the controller circuit board  9020  of the main controller  30  of  FIG.  87 A  (which may be similar to the main control unit  199  of  FIG.  1 A ) operatively connects with the endoscope  9010  and the display units  90 . Referring to  FIG.  90   , controller circuit board  9020  comprises a camera board  9021  that controls the power supplies to the LEDs  9011 , transmits controls for the operation of image sensor(s)  9012  (comprising one or more cameras) in the endoscope, and converts pre-video signals from image sensors to standard video signals. The image sensor  9012  may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) imager. The camera board  9021  in turn receives video signal(s)  9013  generated by the CCD imager and also other remote commands  9014  from the endoscope  9010 . 
     Controller circuit board  9020  further comprises elements for processing the video obtained from the image sensors  9012  through the camera board  9021 , as well as other elements for system monitoring and control. 
     All these elements are connected with the Base Board Module  9052 , which is a PCB. In one embodiment, elements which are ICs (Integrated Circuits) are connected by soldering, element  9026  (SOM or System on Module) is connected by mounting, while all other elements are connected by means of cables. 
     Various elements on the Base Board Module  9052  are described as follows: 
     FPGA (Field Programmable Gate Array)  9023 : 
     FPGA  9023  is a logic device programmed specifically for the system requirements and performs tasks that may be categorized by two types: logic tasks which must be implemented by hardware (as opposed to software), and logic tasks related to video image processing. In one embodiment, the Base Board Module  9052  includes one or more double data rate type three synchronous dynamic random access memory modules (DDR3)  9033  in communication with the FPGA  9023 . 
     Logic tasks which must be implemented by hardware include, but are not limited to: 
     1. Initializing some Base Board Module&#39;s  9052  ICs upon system power-up;
 
2. Monitoring the buttons  9040  for White Balance, LED on/off, Air Flow, and Power on/off on the front-panel  9035 ;
 
3. Monitoring SOM&#39;s  9026  proper operation using a watch-dog mechanism;
 
4. Backing-up some of the system&#39;s parameters (example: airflow level), even while the system is switched off; and
 
5. Communicating with the Camera Board  9021 .
 
     Logic tasks related to video image processing include, but are not limited to: 
     1. Multiplexing video inputs—Each of the multiple imaging elements has several video interfaces which are multiplexed via Video Input Interface  9051 . Further, several auxiliaries are multiplexed via Auxiliary Video Input Interface  9025 .
 
2. Optional digital signal processor (DSP)  9022  playback output and DSP record input.
 
3. Internal test pattern to video outputs via Video Output Interface  9024  to multiple displays.
 
4. Conversion between cameras&#39; video standard to display video standard.
 
5. OSD (On Screen Display) insertion, also known as graphic overlay.
 
     6. PIP (Picture-in-Picture). 
     7. Stitching images from several cameras into one image displayed on a single screen.
 
8. Image adjustments, such as brightness, contrast, etc.
 
     DSP (Digital Signal Processor)  9022 : 
     DSP  9022  is used for recording compressed (coded) video and playing back decompressed (decoded) video. In one embodiment, the standard of compressed video is H264 or equivalent (MPEG). 
     Operationally, FPGA  9023  selects for the DSP  9022  the desired video to be recorded, i.e. any of the inputs, or, more likely, a copy of one or more of the screens. In the latter case, this includes the OSD and format conversion. In the likely case of the screen&#39;s format differing from that of DSP&#39;s  9022  required video input format, the FPGA  9023  also converts the screen&#39;s format to the desired DSP  9022  format while transmitting video to the DSP  9022 . 
     Auxiliary Video Input Interface  9025 : 
     In one embodiment, the video input to the Auxiliary Video Input Interface  9025  may comprise analog video, such as in CVBS (color, video, blanking, sync), S-Video or YPBPR format or digital video (DVI), and may be displayed as such. 
     SOM (System on Module)  9026 : 
     The SOM  9026  provides an interface to input devices such as keyboard, mouse, and touchscreen via Touch I/F  9027 . Through these input devices, together with the buttons  9040  in the Front Panel  9035 , the user controls the system&#39;s functionality and operational parameters. In one embodiment, a peripheral component interconnect express (PCIe) bus connects the SOM  9026  with the FPGA  9023 . Most common types of data traffic over the PCIe are: 
     a. SOM  9026  to FPGA  9023 : Commands (for example, when the user changes operational parameters); and
 
b. FPGA  9023  to SOM  9026 : Registers values, which provide an indication of the internal status, and captured images.
 
     Other Functionalities: 
     The controller circuit board  9020  may further control one or more fluid, liquid and/or suction pump(s) which supply corresponding functionalities to the endoscope through pneumatic I/F  9028 , pump  9029  and check valve  9030 . The controller circuit board further comprises an on-board power supply  9045  and a front panel  9035  which provides operational buttons  9040  for the user. 
     The camera board  9021  receives video signal  9013  which, in one embodiment, comprises three video feeds, corresponding to video pickups by three endoscopic tip viewing elements (one front and two side-looking viewing elements), as generated by the Image sensor  9012 . In one embodiment, the three video feed pickups, corresponding to the three viewing elements (the front-looking, left-side looking and right-side looking viewing elements) of an endoscopic tip (such as the three viewing elements of the tip section  200  of  FIG.  2 A or  2 B ), are displayed on three respective monitors. 
       FIG.  91 A  shows a configuration  9100  of three monitors to display three video feeds respectively, from a front and two side-looking viewing elements of an endoscopic tip, in accordance with an embodiment of the present specification. The configuration  9100  comprises a left-side monitor  9105 , a center monitor  9110  and right-side monitor  9115  placed side-by-side or contiguously such that the respective horizontal bottom edges  9106 ,  9111 ,  9116  are at the substantially same level. In other words, the geometric centers or centroids of the three monitors  9105 ,  9110  and  9115  are maintained at the substantially same level ‘L1’. In accordance with an embodiment, the center monitor  9110  is a square-screen monitor while the left and right-side monitors  9105 ,  9115  are rectangular or wide-screen monitors. Additionally, in one embodiment, the wide-screen/rectangular monitors  9105 ,  9115  are oriented such that their longer edges  9106 ,  9116  are horizontal. 
     Persons of ordinary skill in the art would appreciate that the embodiments of the present specification are directed to both still images as well as video signals generated by the viewing elements of the endoscopic tip. Therefore, it is an intent of the inventors that the term ‘video’ should be understood to encompass both still images as well as moving images and videos. In other words, the aforementioned three video feeds comprise both still image as well as video signals. Also, as would be evident to those of ordinary skill in the art, monitors or display panels are measured/sized in several ways, one of which is by aspect ratios. The aspect ratio of an image is the ratio of the width of the image to its height. Examples of ‘square format’ aspect ratios typically comprise 4:3 and 5:4, while example ‘rectangular’ or ‘wide-screen’ aspect ratios typically comprise 16:9 and 16:10. 
     In one embodiment, the center monitor  9110  displays the video feed pickup by the front-looking viewing element while the left and right-side monitors  9105 ,  9115  display video feeds from the two side-looking viewing elements of the endoscopic tip. The three video feeds are generated in native or standard square formats having aspect ratios such as 4:3 or 5:4. While the square center monitor  9110  displays the square formatted video feed  9102  of the front-looking viewing element on full screen without distortion, the wide-screen or rectangular left and right-side monitors  9105 ,  9115  would either display the square formatted video feeds (from the two side-looking viewing elements) only on a part of the wide-screen or would require the 4:3 or 5:4 aspect ratio of the square formatted video feeds to be modified or modulated to fill up the entire wide-screen of the monitors  9105 ,  9115 , causing unacceptable distortion of the videos and therefore adversely affecting their diagnostic value. Therefore, in accordance with an aspect of the present specification, a main control unit (such as the main controller  30  of  FIG.  87 A ) processes the native or square formatted video feeds for appropriate on-screen display. 
     In one embodiment, the two square formatted video feeds  9101 ,  9103  corresponding to the two side-looking viewing elements are processed for display such that the video  9101  is displayed right-aligned on the left-side monitor  9105  and the video  9103  is displayed left-aligned on the right-side monitor  9115 . In one embodiment, the aspect ratios of the square formatted video feeds  9101 ,  9103  are not modulated causing portions  641 ,  643  of the screens  9105 ,  9115  to be devoid of video. In other embodiments, the aspect ratios of 4:3 or 5:4 of the two square formatted video feeds  9101 ,  9103  of the two side-looking viewing elements are partially modulated or modified by an optimal percentage ‘p’ that allows the two video feeds  9101 ,  9103  to stretch along the length dimension of the wide-screens  9105 ,  9110  while ensuring minimal distortion. In accordance with an embodiment, the optimal percentage ‘p’ is not more than 30%. In other embodiments, the optimal percentage ‘p’ is 5%, 10%, 15%, 20%, 25% or 30% or any increment therein. Since a modulation of ‘p’ stretches the two video feeds  9101 ,  9103  along the length of the wide-screens  9105 ,  9115  the portions  9141 ,  9143  are progressively reduced in terms of area with an increase in modulation of the video feeds displayed. 
     Additionally, the three video feeds  9101 ,  9102 ,  9103  corresponding to the front-looking and two side-looking viewing elements of the endoscopic tip are processed for on-screen display such that all three videos  9101 ,  9102 ,  9103  on the three monitors  9105 ,  9110  and  9115  are displayed at the same level vertically. 
       FIG.  91 B  shows another configuration  9125  of three monitors to display three video feeds  9101 ,  9102 ,  9103  respectively from the front and two side-looking viewing elements of the endoscopic tip, in accordance with an embodiment of the present specification. In configuration  9125  all three monitors, that is, the left-side monitor  9105 , center monitor  9110  and right-side monitor  9115 , are rectangular or wide-screen monitors. In one embodiment, the center monitor  9110  displays the video feed  9102  picked up by the front-looking viewing element while the left and right-side monitors  9105 ,  9115  display video feeds  9101 ,  9103  from the two side-looking viewing elements of the endoscopic tip. The three video feeds  9101 ,  9102 ,  9103  are in native or standard square formats having aspect ratios such as 4:3 or 5:4. 
     In accordance with an embodiment, while the left and right-side monitors  9105 ,  9115  are oriented such that their longer edges  9106 ,  9116  are horizontal, the center monitor  9110  is oriented vertically such that its shorter edge  9112  remains horizontal and the longer edge  9111  is vertical. In one embodiment, the three monitors  9105 ,  9110 ,  9115  are placed side-by-side or contiguously such that the respective bottom edges  9106 ,  9112 , and  9116  are at the substantially same level  12 ′. The configuration  625 , therefore, causes the center monitor  9110  to appear raised with respect to the left and right-side monitors  9105 ,  9115 . 
     In one embodiment, the two square formatted video feeds  9101 ,  9103  corresponding to the two side-looking viewing elements are processed for display such that the video  9101  is displayed right-aligned on the left-side monitor  9105  and the video  9103  is displayed left-aligned on the right-side monitor  9115 . The square formatted video feed  9102  corresponding to the front-looking viewing element is processed to be rotated for proper viewing and also vertically bottom-aligned for display on the center monitor  9110 . The respective alignments of the video feeds  9101 ,  9102 ,  9103  on the three monitors  9105 ,  9110  and  9115  ensure that the videos  9101 ,  9102 ,  9103  are displayed at substantially the same level. 
       FIG.  91 C  shows configuration  9130  in accordance with another embodiment. In configuration  9130  all three monitors, that is, the left-side monitor  9105 , center monitor  9110  and right-side monitor  9115 , are rectangular or wide-screen monitors. In one embodiment, the center monitor  9110  displays the video feed  9102  picked up by the front-looking viewing element while the left and right-side monitors  9105 ,  9115  display video feeds  9101 ,  9103  from the two side-looking viewing elements of the endoscopic tip. The three video feeds  9101 ,  9102 ,  9103  are in native or standard square formats having aspect ratios such as 4:3 or 5:4. In accordance with an embodiment, while the left and right-side monitors  9105 ,  9115  are oriented such that their longer edges  9106 ,  9116  are horizontal, the center monitor  9110  is oriented vertically such that its shorter edge  9112  remains horizontal and the longer edge  9111  is vertical. The three monitors  9105 ,  9110 ,  9115  are placed side-by-side or contiguously such that the respective top edges  9107 ,  9113  and  9117  are at the substantially same level ‘L3’. The configuration  9130 , therefore, causes the center monitor  9110  to appear lowered with respect to the left and right-side monitors  9105 ,  9115 . 
     In one embodiment, the two square formatted video feeds  9101 ,  9103  corresponding to the two side-looking viewing elements are processed for display such that the video  9101  is displayed right-aligned on the left-side monitor  9105  and the video  9103  is displayed left-aligned on the right-side monitor  9115 . The square formatted video feed  9102  corresponding to the front-looking viewing element is processed to be rotated for proper viewing and also vertically top-aligned for display on the center monitor  9110 . The respective alignments of the video feeds  9101 ,  9102 ,  9103  on the three monitors  9105 ,  9110  and  9115  ensure that the videos  9101 ,  9102 ,  9103  are displayed at substantially the same level. 
       FIG.  91 D  shows configuration  9135  in accordance with yet another embodiment. In configuration  9135  all three monitors, that is, the left-side monitor  9105 , center monitor  9110  and right-side monitor  9115 , are rectangular or wide-screen monitors. In one embodiment, the center monitor  9110  displays the video feed  9102  picked up by the front-looking viewing element while the left and right-side monitors  9105 ,  9115  display video feeds  9101 ,  9103  from the two side-looking viewing elements of the endoscopic tip. The three video feeds  9101 ,  9102 ,  9103  are in native or standard square formats having aspect ratios such as 4:3 or 5:4. In accordance with an embodiment, while the left and right-side monitors  9105 ,  9115  are oriented such that their longer edges  9106 ,  9116  are horizontal, the center monitor  9110  is oriented vertically such that its shorter edge  9112  remains horizontal and the longer edge  9111  is vertical. Additionally, the three monitors  9105 ,  9110 ,  9115  are placed side-by-side or contiguously such that their geometric centers or centroids are maintained at the substantially same level  14 ′. The configuration  9135 , therefore, causes the center monitor  9110  to appear vertically in a middle position with respect to the left and right-side monitors  9105 ,  9115 . 
     In one embodiment, the two square formatted video feeds  9101 ,  9103  corresponding to the two side-looking viewing elements are processed for display such that the video  9101  is displayed right-aligned on the left-side monitor  9105  and the video  9103  is displayed left-aligned on the right-side monitor  9115 . The square formatted video feed  9102  corresponding to the front-looking viewing element is processed to be rotated for proper viewing and also vertically center-aligned for display on the center monitor  9110 . The respective alignments of the video feeds  9101 ,  9102 ,  9103  on the three monitors  9105 ,  9110  and  9115  ensure that the videos  9101 ,  9102 , and  9103  are displayed at substantially the same level. 
       FIG.  91 E  shows configuration  9140  in accordance with yet another embodiment. In configuration  9140  all three monitors, that is, the left-side monitor  9105 , center monitor  9110  and right-side monitor  9115 , are rectangular or wide-screen monitors. In one embodiment, the center monitor  9110  displays the video feed  9102  picked up by the front-looking viewing element while the left and right-side monitors  9105 ,  9115  display video feeds  9101 ,  9103  from the two side-looking viewing elements of the endoscopic tip. The three video feeds  9101 ,  9102 ,  9103  are in native or standard square formats having aspect ratios such as 4:3 or 5:4. In accordance with an embodiment, the three monitors  9105 ,  9110  and  9115  are oriented vertically such that their shorter edges  9109 ,  9112 ,  9118  remain horizontal and the longer edges  9106 ,  9111 ,  9116  are vertical. Additionally, the three monitors  9105 ,  9110 ,  9115  are placed side-by-side or contiguously such that their geometric centers or centroids are maintained at the substantially same level  15 ′. 
     In one embodiment, the three square formatted video feeds  9101 ,  9102 ,  9103  corresponding to the front-looking and the two side-looking viewing elements are processed to be rotated for proper viewing and also bottom-aligned in one embodiment (as shown in  FIG.  6 E ) and top-aligned in an alternate embodiment for display. The respective alignments of the video feeds  9101 ,  9102 ,  9103  on the three monitors  9105 ,  9110  and  9115  ensure that the videos  9101 ,  9102 ,  9103  are displayed at substantially the same level. 
     While configuration  9100  of  FIG.  91 A  causes portions  9141 ,  9143  of the left and right-side wide-screen monitors  9105 ,  9115  to be devoid of video, configurations  9125 ,  9130 ,  9135  and  9140  of  FIGS.  91 B through  91 E , respectively, additionally cause portions  9150  and  9151  (relating to configuration  9135  of  FIG.  91 D ) of the center monitor  9110  to be also devoid of video since, in configurations  9125 ,  9130 ,  9135  and  9140  native or square formatted video feed  9102  corresponding to the front-looking viewing element is displayed on a rectangular or wide-screen center monitor  9110 . Referring to  FIGS.  91 B through  91 E , in one embodiment, the aspect ratios of the three square formatted video feeds  9101 ,  9102 ,  9103  (corresponding to the front-looking and two side-looking viewing elements of the endoscopic tip) are not modulated, causing portions  9141 ,  9150 ,  9151  (relating to configuration  9135  of  FIG.  91 D ) and  9143  of the respective screens  9105 ,  9110  and  9115  to be devoid of video. In other embodiments, the aspect ratios of 4:3 or 5:4 of the three square formatted video feeds  9101 ,  9102 ,  9103  are partially modulated or modified by an optimal percentage ‘p’ that allows the three video feeds  9101 ,  9102 ,  9103  to stretch along the length l longer dimension of the wide-screens  9105 ,  9110  and  9115  while ensuring minimal distortion. In accordance with an embodiment, the optimal percentage ‘p’ is not more than 30%. In other embodiments, the optimal percentage ‘p’ is 5%, 10%, 15%, 20%, 25% or 30% or any increment therein. Since a modulation of ‘p’ stretches the three video feeds  9101 ,  9102 ,  9103  along the length of the wide-screens  9105 ,  9110  and  9115  the portions  9141 ,  9142  and  9143  are progressively reduced in terms of area with an increase in modulation of the video feeds displayed. 
     In accordance with an aspect of the present specification, the portions  9141 ,  91509151  (relating to configuration  9135  of  FIG.  91 D ) and  9143  are advantageously utilized to display a plurality of patient related information and/or data. In one embodiment, the patient related information and/or data comprises a plurality of real-time physiological parameters such as patient&#39;s pulse rate, oxygen levels, blood pressure or any other vital physiological parameters as would be evident to persons of ordinary skill in the art. In one embodiment, the patient related information and/or data comprises archived images/videos of endoscopic procedures and/or related anatomical anomalies (such as polyps, for example) of the patient. In one embodiment, the physiological parameters are combined with or toggled with previously archived images/videos of an endoscopic procedure similar to the one being carried out and displayed on the screens  9105 ,  9110  and  9115 . This provides a physician with an advantage to compare the anatomical views of previous endoscopic procedures with those of the current procedure to diagnose and/or review anomalies and/or improvements thereof. In one embodiment, the plurality of patient related information and/or data is accessed from electronic storage memory of a main control unit and/or from a local and/or remote hospital where the patient&#39;s records are being maintained. 
     In accordance with an aspect of the present specification, the three monitors  9105 ,  9110  and  9115  of  FIGS.  91 A through  91 E  together provide a panoramic view based on an overlap between fields of view of the three viewing elements (front-looking and the two side-looking viewing elements).  FIG.  94    shows an example of a panoramic view portrayed by the three monitors  9405 ,  9410  and  9415  that respectively display video feeds generated by a left-side, front and a right-side viewing element of an endoscopic tip. Portions  9420  and  9425  show images that fall within an overlap between fields of view of the three viewing elements. 
     In accordance with an embodiment of the present specification, the three monitors  9105 ,  9110  and  9115  of  FIGS.  91 A through  91 E  are placed side-by-side or contiguously in a linear fashion. That is, the three monitors  9105 ,  9110  and  9115  are not placed at an angle to each other. However, in accordance with alternate embodiments, the left and right-side monitors  9105 ,  9115  are angled with reference to the center monitor  9110 . Such angled configurations are being described hereunder with reference to  FIGS.  92 A and  92 B . 
       FIG.  92 A  shows an embodiment according to the present specification where three monitors  9205 ,  9210  and  9215  are placed side-by-side or contiguously in a non-linear configuration  9200 . In one embodiment, the three monitors  9205 ,  9210  and  9215  display video feeds  9201 ,  9202 ,  9203  from corresponding front-looking and two side-looking viewing elements of an endoscopic tip. In one embodiment, the left and right-side monitors  9205 ,  9215  are oriented at an angle ‘N’ with reference to the center monitor  9210  and towards a viewer. The non-linear configuration  9200  advantageously simulates and portrays an actual greater than 180 degree field of view offered together by a front-looking and two side-looking viewing elements of an endoscopic tip. Thus, the video feeds  9201 ,  9203  from the two side-looking viewing elements having been picked up from the two respective sides of, and from slightly behind, the front-looking viewing element, are correspondingly displayed on the left and right-side monitors  9205 ,  9215  and slightly closer to the viewer due to the angle ‘N’. The angled configuration  9200  provides the viewer with a perceived simulation of the way the front-looking and the two side-looking viewing elements capture respective views/videos  9201 ,  9202 ,  9203 . In various embodiments, the angle ‘N’ ranges from 10 to 30 degrees. In one embodiment, the angle ‘N’ is 20 degrees. 
     In one embodiment, the three monitors  9205 ,  9210  and  9215  are standalone display units which are physically placed side-by-side or contiguously and at the same level while the left-side and right-side monitors  9205 ,  9215  are manually adjustable to form angle ‘N’ with reference to the center monitor  9210 . In one embodiment, the three panels are enabled for vertical adjustments using a clamp or hanger attached to back sides of the each of the three panels wherein the clamp or hanger is adjustable on respective vertical shafts. However, in another embodiment, the three display panels or monitors  9205 ,  9210  and  9215  are integrated within a unitary frame encasement  9220  as shown in  FIG.  92 B . Referring now to  FIG.  92 B , the frame encasement  9220  is manufactured to enable the left and right-side panels  9205 ,  9215  to be pre-configured at angle ‘N’ with reference to the center panel  710 . In one embodiment, the unitary frame encasement is enabled for vertical adjustments using a clamp or hanger attached to back sides of the unitary frame encasement, wherein the clamp or hanger is adjustable on respective vertical shafts. 
     In one embodiment, black image stripes  9207  and  9212  are superimposed between the three contiguous display panels  9205 ,  9210 ,  9215  of  FIG.  92 B  to ensure that a viewer senses each of the correspondingly displayed contiguous videos  9201 ,  9202 ,  9203  as different/distinct, thereby avoiding confusion arising out of a visual overlap between the fields of view of the front and two side-looking viewing elements. In accordance with an embodiment, the black image stripes  9207 ,  9212  are not more than 6 inches wide. 
       FIGS.  93 A and  93 B  show first contiguous video feed group  9305 ,  9310 ,  9315  and second contiguous video feed group  9306 ,  9311 ,  9316  displayed on a single monitor  9325  in accordance with an embodiment of the present specification. 
     Referring now to  FIG.  93 A , in one embodiment, a front-looking and two side-looking (left-side looking and right-side looking) viewing elements (hereinafter together referred to as ‘three viewing elements’) of an endoscopic tip are wide angle viewing elements, wherein each viewing element has a field of view of greater than 100 degrees and up to essentially 180 degrees. Therefore, together, the three viewing elements provide a combined field of view greater than 180 degrees covering the front and two side views. In one embodiment, the combined greater than 180 degrees field of view (based on an overlap between fields of view of the three viewing elements) is processed by a main control unit (such as the main controller  30  of  FIG.  87 A ), and displayed on the single monitor  9325  to simulate the real-life panoramic view while ensuring none or minimal/partial modulation of the native/standard aspect ratios of the three video feeds generated by the three viewing elements. 
     In accordance with an embodiment of the present specification, the three video feeds  9305 ,  9310 ,  9315  of the three viewing elements are combined into a resultant single video frame covering an integrated front and two side views based on an overlap between fields of view of the front and two side-looking viewing elements. In other words, the resultant single video frame represents an integrated field of view combining the fields of views of the three viewing elements. Thereafter, the resultant single video frame is sliced or broken-up into a center video frame  9310  that represents a planar front view of the front-looking viewing element. In one embodiment, the center video frame  9310  covers a sum of X degrees of views on either side (that is, the left and the right sides) of a center of the integrated field of view of the resultant single video frame. In one embodiment, X is 15 degrees. In one embodiment, X is up to 30 degrees for the front viewing element. The portion, of the resultant single video frame, remaining beyond X degrees on the left side of the center of the integrated field of view forms a left video frame  9305  representing a planar left side view of the left side-looking viewing element. Similarly, the portion of the resultant single video frame remaining beyond X degrees on the right side of the center of the integrated field of view forms a right video frame  9315  representing a planar right side view of the right side-looking viewing element. Thus, in accordance with an embodiment, the resultant single video frame representing an integrated field of view by combining the fields of view of the three viewing elements is broken-up or sliced to form three video frames  9305 ,  9310  and  9315 . In one embodiment, the three video frames  9305 ,  9310  and  9315  are displayed contiguously on the single monitor  9325 . 
     Referring now to  FIG.  93 B , in accordance with another embodiment of the present specification, a unitary video feed from any one of the three viewing elements is separately sliced or broken up into three video frames  9306 ,  9311  and  9316  (depending upon the video feed of which viewing element is required to be displayed), since each of the three viewing elements offers a field of view of greater than 100 degrees and essentially up to 180 degrees. In this embodiment, the video feeds from the three viewing elements can be toggled or selected, using toggling/selection buttons on the handle  104  of  FIG.  1 A  (or the handle  22  of  FIG.  87 A ), to display a unitary video feed corresponding to any one of the viewing elements (front-looking viewing element or any one of the left or right-looking viewing elements). Therefore, in one embodiment, a unitary video frame representative of a viewing element, that is toggled or selected for display on the monitor  9325 , is sliced or broken-up into a center video frame  9311  that represents a planar front view covering a sum of X degrees of views on either side (that is, the left and the right sides) of the center of field of view of the viewing element. In one embodiment, X is 15 degrees. In one embodiment, X is up to 30 degrees. The portion of the unitary video frame remaining beyond X degrees on the left side of the center of field of view forms a left video frame  9306  representing a planar left side view. Similarly, the portion of the unitary video frame remaining beyond X degrees on the right side of the center of field of view forms a right video frame  9316  representing a planar right side view. Thus, in accordance with an embodiment, the unitary video frame representing a field of view of any one of the three viewing elements is broken-up or sliced to form three video frames  9306 ,  9311  and  9316 . In one embodiment, the three video frames  9306 ,  9311  and  9316  are displayed contiguously on the single monitor  9325 . 
     In one embodiment, black image stripes  9307  and  9312  are superimposed between the three contiguous video frames  9305 ,  9310 ,  9315  of  FIG.  93 A  and the three contiguous video frames  9306 ,  9311 ,  9316  of  FIG.  93 B  to ensure that a viewer senses each of the three contiguous video frames as different or distinct. In accordance with an embodiment, the black image stripes  9307 ,  9312  are not more than 6 inches wide. 
     Persons of ordinary skill in the art would appreciate that the planes of left, center and right side views are not coplanar. Therefore, in one embodiment, the left and right video frames  9305 ,  9315  as well as the video frames  9306 ,  9316  are displayed in a slightly skewed or twisted form, as shown in  FIGS.  93 A and  93 B , with reference to the respective center video frames  9310  and  9311  to simulate the real-life non-coplanar views generated by the three viewing elements of the endoscopic tip. 
     In one embodiment, the first and second contiguous video frame groups  9305 ,  9310 ,  9315  and  9306 ,  9311 ,  9316  are natively square formatted with aspect ratios 4:3 or 5:4. In one embodiment, the monitor  9325  is a rectangular or wide-screen display monitor. In an alternate embodiment, the monitor  9325  is a square display monitor. 
     According to an embodiment, the native or standard square aspect ratios of 4:3 or 5:4 of the first and second contiguous video frame groups  9305 ,  9310 ,  9315  and  9306 ,  9311 ,  9316  are not modified or modulated for display on to the monitor  9325 . In accordance with an aspect of the present specification, the square aspect ratios of 4:3 or 5:4 of the first and second contiguous video frame groups  9305 ,  9310 ,  9315  and  9306 ,  9311 ,  9316  are partially modified or modulated (for display on to the monitor  9325 ) by an optimal percentage ‘p’ while ensuring minimal distortion. In accordance with an embodiment, the optimal percentage ‘p’ is not more than 30%. In other embodiments, the optimal percentage ‘p’ is 5%, 10%, 15%, 20%, 25% or 30% or any increment therein. 
     There is provided, according to an aspect of some embodiments, an endoscope configured to provide quasi-simultaneously N views, N being greater than 1. The endoscope comprises N optical systems configured to collect light from directions associated with the N views, and further comprises M image capturing devices, where M is smaller than N. The image capturing devices are configured to capture light collected by the N optical systems, thereby providing N views quasi-simultaneously. According to some embodiments, M equals to one. According to some embodiments, M equals to two. According to some embodiments, N equals to three. 
       FIG.  95 A  schematically depicts an embodiment of tip  9510  of an endoscope configured to provide multiple views according to the teachings of this specification. Tip  9510  comprises three optical systems,  9520 ,  9530  and  9540 , respectively, and a single image capturing device  9550  having a light sensitive surface  9552 . Center optical system  9520  comprises a center lens assembly  9522 . Center optical system  9520  is directed forward, thereby being configured to collect light substantially from a forward direction of tip  9510 . Center optical system  9520  is further configured to generate from such collected light an image on a center portion  9552   a  of light sensitive surface  9552 , thereby allowing tip  9510  to provide a forward directed view. 
     Left optical system  9530  comprises a left side lens assembly  9532  and a left side prism  9534 . Left optical system  9530  is directed to a direction substantially perpendicular to the forward direction of tip  9510 , referred to as a left direction, thereby being configured to collect light substantially from a left direction of tip  9510 . Left side prism  9534  is configured to deflect light generally coming from the left direction of tip  9510  and collected by left side lens assembly  9532  towards image capturing device  9550 . Left optical system  9530  is further configured to generate from such light collected by left side lens assembly  9532  an image on a left portion  9552   b  of light sensitive surface  9552 , thereby allowing tip  9510  to provide also a left side directed view. Left portion  9552   b  is positioned substantially sidewise to center portion  9552   a.    
     Right optical system  9540  comprises a right side lens assembly  9542 , and a right side prism  9544 . Right optical system  9540  is directed to a direction substantially perpendicular to the forward direction of tip  9510 , referred to as a right direction, thereby being configured to collect light substantially from a right direction of tip  110 . Right side prism  9544  is configured to deflect light generally coming from the right direction of tip  9510  and collected by right side lens assembly  9542 , towards image capturing device  9550 . Right optical system  9540  is further configured to generate from such light collected by right side lens assembly  9542  an image on a right portion  9552   c  of light sensitive surface  9552 , thereby allowing tip  9510  to provide also a right side directed view. Right portion  9552   c  is positioned substantially sidewise to center portion  9552   a.    
     In operation, an image may be obtained from image capturing device  9550  using any suitable technique adapted to obtain images from image capturing device  9550 . For example, in some embodiments, image capturing device  9550  comprises a CCD, and obtaining an image therefrom comprises applying a scan signal to the CCD as is known in the art. A typical image  9560  obtained from image capturing device  9550  is in a form of a split screen, as is schematically depicted in  FIG.  95 B . Image  9560  generally comprises three fields  9562   a ,  9562   b  and  9562   c , associated with the three portions  9552   a ,  9552   b  and  9552   c , respectively, wherein each field includes an image obtained from a center view, a left view and a right view, respectively, by tip  9510 . Images associated with the three fields  9562   a ,  9562   b , and  9562   c  may consequently be separated to form separated still images or separated sequences of video images, associated respectively with each of the three views, using any suitable technique of image processing as is known in the art. 
       FIG.  96    schematically depicts an embodiment of tip  9610  of an endoscope configured to provide three views, namely a left view, a forward view and a right view, according to the teachings herein. Tip  9610  comprises three optical systems  9620 ,  9630  and  9640 , associated with a left view, a forward view and a right view, respectively. Tip  9610  further comprises a single image capturing device  9650  having a light sensitive surface  9652 . Tip  9610  further comprises a stepwise rotating optical element. In one embodiment, the stepwise rotating optical element comprises a semi-transparent mirror  9662 . In another embodiment, the stepwise rotating optical element comprises a lens. Semi-transparent mirror  9662  is associated with a controllably rotatable component such as an actuator or a step motor. Upon command, the controllably rotatable component may rotate and position semi-transparent mirror  9662  in one of three pre-defined positions, associated with the three views available by tip  9610 . 
     Left optical system  9620  is directed to a direction substantially perpendicular to the forward direction of tip  9610 , referred to as a left direction, thereby being configured to collect light substantially from a left direction of tip  9610 . When semi-transparent mirror  9662  is positioned in position  9662   a , semi-transparent mirror  9662  reflects light collected by left optical system  9620  towards light sensitive surface  9652  of image capturing device  9650 . Accordingly, when semi-transparent mirror  9662  is positioned in position  9662   a , left optical system  9620  and semi-transparent mirror  9662  are configured together to generate an image on light sensitive surface  9652  from light collected from the left direction, thereby allowing tip  9610  to provide a left side directed view. 
     Center optical system  9630  is directed forward, thereby being configured to collect light substantially from a forward direction of tip  9610 . When semi-transparent mirror  9662  is positioned in position  9662   b , light collected by optical system  9630  penetrates through semi-transparent mirror  9662  towards light sensitive surface  9652 . Accordingly, when semi-transparent mirror  9662  is positioned in position  9662   b , center optical system  9630  and semi-transparent mirror  9662  are configured together to generate an image on light sensitive surface  9652  from light collected from the forward direction, thereby allowing tip  9610  to provide a forward directed view. 
     Right optical system  9640  is directed to a direction substantially perpendicular to the forward direction of tip  9610 , referred to as a right direction, thereby being configured to collect light substantially from a right direction of tip  9610 . When semi-transparent mirror  9662  is positioned in position  9662   c , semi-transparent mirror  9662  reflects light collected by right optical system  9640  towards light sensitive surface  9652 . Accordingly, when semi-transparent mirror  9662  is positioned in position  9662   c , right optical system  9640  and semi-transparent mirror  9662  are configured together to generate an image on light sensitive surface  9652  from light collected from the right direction, thereby allowing tip  9610  to provide a right side directed view. 
     In operation, an image may be obtained from image capturing device  9650  using any suitable technique adapted to obtain images from image capturing device  9650 . Typically, obtaining an image from image capturing device  9650  may take a pre-determined time ‘Tim’. For example, in some embodiments, image capturing device  9650  comprises a CCD, and obtaining an image therefrom comprises applying a scan signal to the CCD as is known in the art. The time ‘Tim’ to obtain a single image from a CCD substantially corresponds to the time of a complete scan of the CCD. According to some embodiments of use, rotation of semi-transparent mirror  9662  is synchronized with time periods ‘Tim’ of obtaining images from image capturing device  9650 . For example, sequentially obtaining images corresponding to a left view, a center view and a right view, respectively, may comprise iterating the steps of rotating semi-transparent mirror  9662  and positioning it in position  9662   a ; obtaining a left view image; rotating semi-transparent mirror  9662  and positioning it in position  9662   b ; obtaining a forward view image; rotating semitransparent mirror  9662  and positioning it in position  9662   c ; and obtaining a right view image. 
     According to some embodiments, tip  9610  further comprises a shutter assembly  9670  comprising left shutter  9672   a , a center shutter  9672   b  and a right shutter  9672   c , corresponding to left optical system  9620 , center optical system  9630  and right optical system  9640 , respectively. Shutter assembly  9670  is configured to allow passage of light to image capturing device  9650  from no more than one of the three directions—left, forward and right. In operation, shutter assembly  9670  is substantially synchronized with semi-transparent mirror  9662 , so that when semi-transparent mirror  9662  is positioned in position  9662   a , left shutter  9672   a  is open and center shutter  9672   b  and right shutter  9672   c  are closed, thus allowing light collected by left optical system  9620  to form an image on light sensitive surface  9652 , and blocking light coming from the forward direction and from the right direction. Likewise, when semi-transparent mirror  9662  is positioned in position  9662   b , center shutter  9672   b  is open and right shutter  9672   c  and left shutter  9672   a  are closed, and when semi-transparent mirror  9662  is positioned in position  9662   c , right shutter  9672   c  is open and left shutter  9672   a  and center shutter  9672   b  are closed. 
       FIG.  97 A  schematically depicts an embodiment of tip  9710  of an endoscope configured to provide three views, namely a left view, a forward view and a right view, according to the teachings herein. Tip  9710  comprises three optical systems,  9720 ,  9730  and  9740 , associated with a left view, a forward view and a right view, respectively. Tip  9710  further comprises a single image capturing device  9750  having three light sensitive surfaces  9752   a ,  9752   b  and  9752   c , facing optical systems,  9720 ,  9730  and  9740 , respectively. Left optical system  9720  is configured to collect light substantially from a left direction of tip  9710  and to generate an image on light sensitive left surface  9752   a , thereby allowing tip  9710  to provide a left side directed view. Likewise center optical system  9730  is configured to collect light substantially from a forward direction of tip  9710  and to generate an image on light sensitive center surface  9752   b , and right optical system  9740  is configured to collect light substantially from a right direction of tip  9710  and to generate an image on light sensitive right surface  9752   c , thereby allowing tip  9710  to provide a center directed view and a right side directed view, respectively. 
     In operation, images may be obtained from image capturing device  9750  from each light sensitive surface independently. According to some exemplary embodiments, image capturing device  9750  may comprise three CCD elements assembled together to form three light sensitive surfaces  9752   a ,  9752   b , and  9752   c , respectively. A single scan circuitry may provide scan signals to scan the three CCD elements. According to some embodiments, a substantially same scan signal may be employed to scan light sensitive elements  9752   a ,  9752   b  and  9752   c . Images corresponding to three views, for example three video streams, may thus be obtained substantially simultaneously from image capturing device  9750 . 
       FIG.  97 B  schematically depicts an embodiment of tip  9715  of an endoscope configured to provide three views, namely a left view, a forward view and a right view, according to the teachings herein. Tip  9715  comprises three optical systems,  9725 ,  9735  and  9745 , associated with a left view, a forward view and a right view, respectively. Tip  9715  further comprises a single image capturing device  9755  having three light sensitive elements  9753   a ,  9753   b  and  9753   c , facing optical systems,  9725 ,  9735  and  9745 , respectively. Light sensitive elements  9753   a  and  9753   b  are mechanically connected to each other by a flexible member  9754  and light sensitive elements  9753   b  and  9753   c  are mechanically connected to each other by a flexible member  9756 . When assembled, light sensitive element  9753   a  may be arranged to be tilted at an angle relative to light sensitive element  9753   b , wherein the angle may be selected from within a pre-determined range. 
     For example, in some embodiments, light sensitive element  9753   a  may be assembled when arranged to be perpendicular to light sensitive element  9753   b . According to some embodiments, light sensitive element  9753   a  may be assembled when arranged to be at a desired angle between zero degrees and ninety degrees relative to light sensitive element  9753   b . Likewise, light sensitive element  9753   c  may be assembled when arranged to be tilted at an angle relative to light sensitive element  9753   b , wherein the angle may be selected from within a pre-determined range. In some embodiments, light sensitive element  9753   c  may be assembled perpendicular to light sensitive element  9753   b . According to some embodiments, light sensitive element  9753   c  may be assembled when arranged to be at a desired angle between zero degrees and ninety degrees relative to light sensitive element  9753   b . According to some embodiments, left optical system  9725  and right optical system may be arranged to be directed to a direction to which light sensitive elements  9753   a  and  9735   b , respectively, face. According to some embodiments, tip  9715  may provide a left view and a right view that are not necessarily perpendicular to a forward view. According to some embodiments, left optical system  9725  and right optical system  9745  may be controllably tilted by an alignment module so as to collect light from a selected direction having an angle with the forward direction of tip  9715  between zero and ninety degrees. According to some embodiments, when left optical system  9725  and/or right optical system  9745  are controllably tilted as described above, light sensitive elements  9753   a  and  9753   c , respectively, are accordingly tilted to be facing optical systems  9725  and  9745  respectively. According to some embodiments, tilting optical systems  9725  and/or  9745  and correspondingly obtaining a left view and/or a right view, which divert from perpendicular to a forward view, may be employed in real time, during an endoscopy procedure. According to some embodiments, obtaining images from image capturing device  9755  is substantially similar to obtaining images from image capturing device  9750  as described above. 
       FIG.  98    schematically depicts an embodiment of a tip  9810  of an endoscope configured to provide multiple views according to the teachings herein. Tip  9810  comprises three optical systems,  9820 ,  9830  and  9840 , respectively, a center image capturing device  9850  and a side image capturing device  9860 , having corresponding light sensitive surfaces  9852  and  9862 , respectively. Center optical system  9820  comprises a center lens assembly  9822 . Center optical system  9820  is directed forward, thereby being configured to collect light substantially from a forward direction of tip  9810 . Center optical system  9820  is further configured to generate from such collected light an image on center light sensitive surface  9852 , thereby allowing tip  9810  to provide a forward directed view. 
     Left optical system  9830  comprises a left side lens assembly  9832 , and a left side prism  9834 . Left optical system  9830  is directed to a left direction, thereby being configured to collect light substantially from a left direction of tip  9810 . Left side prism  9834  is configured to deflect light generally coming from the left direction of tip  9810  and collected by left side lens assembly  9832 , towards side image capturing device  9860 . Left optical system  9830  is further configured to generate from such light collected by left side lens assembly  9832  an image on a left portion  9860   a  of light sensitive side surface  9862 , thereby allowing tip  9810  to provide also a left side directed view. 
     Right optical system  9840  comprises a right side lens assembly  9842 , and a right side prism  9844 . Right optical system  9840  is directed to a right direction thereby being configured to collect light substantially from a right direction of tip  9810 . Right side prism  9844  is configured to deflect light generally coming from the right direction of tip  9810  and collected by right side lens assembly  9842 , towards side image capturing device  9860 . Right optical system  9840  is further configured to generate from such light collected by right side lens assembly  9842  an image on a right portion  9860   b  of light sensitive side surface  9862 , thereby allowing tip  9810  to provide also a right side directed view. Right portion  9860   b  is positioned substantially sidewise to left portion  9860   a.    
     In operation, images are obtained independently from center image capturing device  9850  and from side image capturing device  9860 . Images obtained from side image capturing device  9860  are generally in split screen format, having a left field and a right field, corresponding to left view and right view received from left optical system  9830  and from right optical system  9840 , respectively, substantially as described above regarding image  9560  and fields  9562   a ,  9562   b  and  9562   c  in  FIG.  95    above. Images obtained from center image capturing device  9850  correspond exclusively to the forward direction view. 
       FIG.  99    schematically depicts an embodiment of a tip  9910  of an endoscope configured to provide multiple views according to the teachings herein. Tip  9910  comprises three optical systems,  9920 ,  9930  and  9940 , respectively, and a double sided image capturing device  9950 , having two light sensitive surfaces  9952  and  9954  on the two sides of double sided image capturing device  9950 , respectively. 
     Center optical system  9920  comprises a center lens assembly  9922 . Center optical system  9920  is directed forward, thereby being configured to collect light substantially from a forward direction of tip  9910 . Center optical system  9920  is further configured to generate from such collected light an image on center light sensitive surface  9952 , thereby allowing tip  9910  to provide a forward directed view. 
     Left optical system  9930  comprises a left side lens assembly  9932 , and a left side prism  9934 . Left optical system  9930  is directed to a left direction, thereby being configured to collect light substantially from a left direction of tip  9910 . Left side prism  9934  is configured to deflect light generally coming from the left direction of tip  9910  and collected by left side lens assembly  9932 , towards image capturing device  9950 . Left optical system  9930  is further configured to generate from such light collected by left side lens assembly  9932  an image on a left portion  9954   a  of light sensitive side surface  9954 , thereby allowing tip  9910  to provide also a left side directed view. 
     Right optical system  9940  comprises a right side lens assembly  9942  and a right side prism  9944 . Right optical system  9940  is directed to a right direction, thereby being configured to collect light substantially from a right direction of tip  9910 . Right side prism  9944  is configured to deflect light generally coming from the right direction of tip  9910  and collected by right side lens assembly  9942  towards image capturing device  9950 . Right optical system  9940  is further configured to generate from such light collected by right side lens assembly  9942  an image on a right portion  9954   b  of light sensitive side surface  9954 , thereby allowing tip  9910  to provide also a right side directed view. Right portion  9954   b  is positioned substantially sidewise to left portion  9954   a.    
     In some embodiments of operation, images are obtained from image capturing device  9950  substantially similarly to obtaining images from image capturing devices  9750  and  9755  in  FIGS.  97 A and  97 B  above. Generally, a single scan signal may be employed in embodiments of image capturing device  9950  comprising a double sided CCD or two CCD&#39;s assembled back to back. Images obtained from light sensitive side surface  9954  are generally in split screen format, having a left field and a right field, corresponding to left view and right view received from left optical system  9930  and from right optical system  9940 , respectively, substantially as described above regarding side image capturing device  9860  in  FIG.  98   . Images obtained from center light sensitive surface  9952  correspond exclusively to the forward direction view. 
     Referring back to  FIG.  90    again, it should be appreciated that in order to deliver a synchronized display from multiple cameras rapidly and in real-time to the physician, image data from each of the camera sensors should be processed in real-time and synchronized before display. This should be done in a manner that minimizes latency, yet insures a high quality output. Thus, the video processing architecture of the present specification enables three major functionalities: 
     a) signal transmission and control for each camera in a manner that optimally shares resources, thereby decreasing the total number of signals which need to be transmitted over cable, resulting in an ability to use a smaller cable for signal transport while still allowing for a high signal to noise ratio; 
     b) processing of camera data, wherein data are separately processed to ensure no latency and then synchronized; and 
     c) transmitting the processed data for display in a manner that optimally shares resources. 
     These functions of the video processing architecture are further explained with reference to  FIGS.  100  and  101   . For an embodiment in which one front camera and two side cameras are employed, a conventional video processing system would require the transmission of 36 separate signals, in which each camera would have 12 signals associated with it, including 11 control signals and 1 video return. In one embodiment, the following signals are required in order to effectively operate a camera and receive video signals from the camera: 
     1. V01—Vertical Register Clock 
     2. V02—Vertical Register Clock 
     3. V03—Vertical Register Clock 
     4. V04—Vertical Register Clock 
     5. H01—Horizontal Register Clock 
     6. H02—Horizontal Register Clock 
     7. RG—Reset Gate Clock 
     8. VDD—Supply voltage (15V) 
     9. VL—Supply voltage (−7.5V) 
     10. SUB—Substrate Clock 
     11. LED—Light Emitting Diodes Voltage 
     12. Vout—Video Out Signal 
     13. Ground 
     While the Ground signal is common, transmitting the rest of the 36 signals (12 signals for each of the three cameras) to and from the camera circuit board would require a cable with a diameter of approximately 3 millimeters in order to achieve an acceptable signal to noise ratio, which, given the constrained space in the endoscope tip, is too bulky. Using cables with a smaller diameter would result in video signals with unacceptably high noise levels. 
     The present embodiments are able to employ a cable with a smaller diameter, i.e. approximately 2.5 millimeters or less, thereby saving valuable space in the endoscope internal volume. To do so, an embodiment of the disclosed video controller generates a set of signals, smaller in number than the 36 signals that are conventionally required, which are transmitted by the controller to the camera circuit board and then processed by the circuit board to provide each camera with the specific signal instructions needed. This allows the system to manipulate all the requisite signals without having to use 36 different signals. 
     In one embodiment, the first nine control signals (V01, V02, V03, V04, H01, H02, RG, VDD, and VL) are shared among cameras by splitting the signal in the Camera Board and branching in the Camera Head. The remaining signals are not shared. For example, the SUB signals are specific for each camera, as they are used for “Shutter Control”. Therefore, in such an embodiment, the system uses individual SUB1, SUB2 and SUB3 signals for the three cameras. Additionally, the LED circuits, which are used for illumination, receive power separately and individually. Therefore, in such an embodiment, there are three signals—LED1, LED2 and LED3 for LED power voltages. With nine signals being shared, the total number of signals required to operate with three cameras reduces from 36 to 18, including three individual video output signals. 
       FIG.  100    is a table detailing the shared and individual signals for each camera. As can be seen from the figure, the sets of signals  10001  and  10002  are jointly shared or common for all the cameras, whereas the sets of signals  10003 ,  10006  and  10009  are individual signals for the front and two side cameras. Amongst other signals, Functional GND  10011  is a common signal for all cameras and additional electronic devices in the scope. Signals “+3.3V Secondary Insulated”  10012 , SCL_1  10013 , and SDA_1  10014  are signals and power for electronic devices, such as memory, that come with additional manufacturer information, switches and switch interface, etc. 
       FIG.  101    illustrates the various signals that connect camera board  10015  to the CCD cameras and other components in the video processing unit. As can be seen from the figure, there are 13 CCD control signals (9 common, one Ground and 3 individual—SUB1, SUB2 and SUB3)  10016 . Also there are 3 signals for LED power  10017  and 3 pre-video output signals  10018  from the CCD cameras. 
     The other signals (3× CCIR 656 Digital Video, 3×CVBS and 3×S-Video) provide interface with components such as FPGA processor, video output interface, and Digital Signal Processor (DSP), among other components. These components have been described with reference to  FIG.  90   . 
     It may be noted that while sharing signals, critical operational constraints should be kept in mind in order to maintain an acceptable signal to noise ratio (SNR) and to not compromise on the output image quality. In one embodiment, the endoscope video processing system transmits and/or receives at least the Video output, RG, H1, and H2 signals via a coaxial type cable. In one embodiment, the endoscope video processing system transmits and/or receives the signals using a cable diameter (thickness) no greater than 2.5 mm. In one embodiment, the endoscope video processing system transmits and/or receives the signals using conductors no smaller than 46 AWG to avoid creating an unacceptable signal to noise ratio. 
     In one embodiment, the endoscope video processing system transmits and/or receives the signals using a cable diameter (thickness) no greater than 2.06 mm in diameter. In one embodiment, the endoscope video processing system transmits and/or receives the signals using a 42AWG coaxial cable with six channels. 
     In one embodiment, the endoscope video processing system transmits and/or receives the signals using a cable that is sized based on the number and/or bandwidth of the signals. For example, if one transmits and receives a total of 18 individual signals and shares  9  of those signals between two or more cameras, then one may use a cable having a diameter in the range of 2-2.5 millimeters, thereby enabling an acceptable signal to noise ratio and an acceptable cable size. If, however, less than 6 signals are shared, then the total number of individual signals transmitted and received increases to 24, thereby requiring that the cable diameter exceed 2.5 mm or that the internal conductors be smaller than 46AWG, which would not only result in an unacceptable signal to noise ratio (SNR), but also limit the ability to assemble (solder) the components of the circuit board properly. Thus, the system of present specification optimally shares the signals without compromising on SNR. 
     Signal sharing may occur by having the video controller send a single signal to the camera circuit board, which then applies one or more pre-programmed functions to the signal to transform the signal into three separate signals, one for each of the three cameras. In one embodiment, the pre-programmed function splits the received signal and amplifies it for use. In another embodiment, the pre-programmed function scales, adjusts, divides, or multiplies the received signal in a manner that is specific to the particular camera. In one embodiment, to achieve effective signal sharing, high speed common signals such as H1, H2, RG or similar produced in the camera board, are produced such that:
         Sources of signals are matched by impedance with coaxial cable impedance;   Signals are pre-formed in sources in a manner that compensates for disturbances arising out of factors such as cable parameters not matching with imagers (CCD sensors) and other factors;   Parameters for pre-forming signals are stored in a camera board on-board memory or in the scope; and   In the camera head (tip of the endoscope), signals are distributed between imagers.       

     As mentioned above, each camera generates its own individual video output signal. This raw video data are then processed for display. The video streams received from the different cameras may be displayed separately on display, either side-by-side or interchangeably, wherein the operator may switch between views from the different cameras manually. Alternatively, these video streams may be processed by a controller to combine them into a single, panoramic video frame based on an overlap between fields of view of the cameras. In one embodiment, the three output video streams may be displayed on three different monitors. 
     In one embodiment, each video signal is separately processed which enhances the speed of processing. However, this may result in a potential lack of synchronization between the signals. Conventional imaging systems use frame grabbers or memories to synchronize different cameras. These, however, are bulky and not suitable for synchronizing multiple cameras in an endoscopic system. To address this problem, the system of the present specification generates specific synchronization signals to co-ordinate the outputs of CCD sensors. 
       FIGS.  102  and  103    are block diagrams illustrating exemplary synchronization methods. Referring to  FIG.  102   , the chipset of the system of the present specification has two main components—DSP  10021  and CDS  10022 . CDS  10022  comprises the part of camera board that is responsible for the creation of synchronization signals for each CCD camera sensor  10023 . The synchronization signals include H1, H2 and RG (horizontal HF sync), as described with reference to  FIG.  100    earlier. DSP  10021  processes the raw video data received from the CCD cameras. 
     Initially, the same “clock” generates a common signal that is transmitted to all of the three cameras. That is, a signal from the clock is amplified, used to drive the circuitry, and used to concurrently trigger a rest signal for the video processing circuitry. 
     Referring to  FIG.  103   , in order to synchronize the video signals, H1, H2 and RG, signals from the CDS  10031  are neglected. Instead, the synchronization signals (CLK)  10032  are generated digitally by using FPGA. By generating the synchronization signals explicitly, the signal timing (Phase), signal frequency (signal width) and signal amplitude can be controlled. The video data received from the CCDs  10033  is processed by the DSP  10034 . The CLK signal phase, frequency and amplitude are so adjusted that the video information is triggered exactly on a valid RG signal. Adjusting the CLK signal parameters allows driving and locking on the video signals from all the camera sensors at the same time. 
     The video processing system of the present specification also incorporates a cable compensation methodology. One of ordinary skill in the art would appreciate that different kinds of endoscopic devices have different cable lengths on the scopes. The variation in the cable length is compensated by manipulating the synchronization signals in such a manner that all three CCDs will experience the signals as expected from their side. This is done by following a process similar to that described above, by which the timing and amplitude of the synchronization signal is adjusted. Thus, for each cable length, different timing and amplitude is set. Further, this mechanism can also be automated by “sensing” the feedback from the CCD and tuning the appropriate parameters accordingly. 
     In accordance with an aspect of the present specification, systems and methods are provided for managing different views in a cohesive manner. In one embodiment, the functionality of switching between views is seamlessly integrated with the image capture functionality. 
     In one embodiment, the user (physician) is provided with a simple and user friendly interface that helps him or her to toggle between multiple views and manipulate images. The interface also assists the user in better navigation of the endoscope through difficult areas. In one embodiment, the user interface assists the physician in detecting anomalies and also helps the physician to perform the endoscopic procedure in accordance with best practices guidelines. 
       FIG.  104    illustrates three displays  10041 ,  10042  and  10043  being operated with a single endoscope  10044 . A person of ordinary skill in the art would appreciate that an endoscope is a heavy and difficult to manipulate instrument. Therefore, managing three different displays along with the endoscope may make the process more difficult and complex for the physician handling the endoscope. In order to simplify managing views on three screens, the present specification provides a user friendly and intuitive interface, such that the user is assisted by having three views and is not inhibited in carrying out the endoscopic procedure. 
     Therefore, in a preferred embodiment, the controls for manipulation are provided by means of buttons  10045  located on the endoscope handle itself. Using these buttons, the physician can easily manipulate images to the benefit of the procedure. Further, in order that the physician instantly recognizes which of the three displays is active or which view the controls are focused on, in one embodiment, an indication is provided on the relevant display. For example, if the second display  10042  is currently active, “Screen 2” 10046 is displayed on the screen. This implies that the physician is currently focusing on the display  10042 , and may further use the buttons  10045  on the endoscope handle to manage or manipulate the view. 
       FIG.  105 A  illustrates an exemplary configuration of the endoscope handle  10051 . Button  10052 , when pressed, can be used to toggle between different views. In one embodiment, each time button  10052  is pressed, the next view is activated. As mentioned above, switching can be done between different views on the same monitor, or between different monitors. Button  10053  can be used to capture a still from the video or image being displayed. Button  10054  can be used to record a video; the same button  10054 , when pressed again, can be used to stop the recording. In one embodiment, the record function when activated, enables recording of all the views simultaneously. 
       FIG.  105 B  illustrates an exemplary indication of video recording on the display screen that helps the user to keep track of the recording progress. Referring to  FIG.  105 B , active screen indication  10055  indicates the screen that the user is focusing on. As soon as the user initiates recording by pressing the relevant button in the endoscope handle, an icon, such as green icon  10056  is displayed on the active screen. A progress bar, such as progress bar  10057  with a timer  10058 , also starts next to the icon  10056 . As soon as the user presses a button to stop recording, the progress bar and the timer stop and a second icon, such as a red icon  10059 , appears at the end of progress bar  10057 . One of ordinary skill in the art would appreciate that the icons may be located at any place on the screen. 
       FIG.  106 A  illustrates another exemplary configuration of the endoscope handle  10061 . Here, button  10062  can be used to toggle between displays by pressing left or right. In one embodiment, button  10062  is a scroll wheel and can be simply rotated to switch between views. The center  10063  of button  10062 , when pressed, can be used to capture a still image. In one embodiment, the action of “pressing and holding” the center button  10063  initiates video recording. Pressing the button  10063  one more time would end the recording. Another button  10064  is provided on the handle that can be used to zoom in and out on the image being displayed, by pressing in forward and reverse directions, respectively. 
       FIG.  106 B  illustrates another example of image management indications on the display, the active display being indicated by the sign  10065 . Zooming is indicated by means of a slider  10066  between standard “+” and “−” symbols  10067  and  10068  for zoom. As the user moves the relevant button on the endoscope handle forward and backward for zooming (as explained with reference to  FIG.  106 A  above), the slider  10069  correspondingly moves forward or backward to zoom. Icon  10060  appears when the user captures a still image. Further, when a recorded video is being displayed, a set of buttons  10070  indicating standard signs of play, pause, stop, rewind and forward appear on the screen. In one embodiment, where the display comprises a touch-screen, the set of buttons  10070  may be used to control the display of recorded video. Further, in a touch-screen display, the other buttons or icons  10069 ,  10067 ,  10068  and  10060  may also be used to effectuate the functions they represent. 
     In one embodiment, the present specification allows more than one view to be active at the same time. This enables recording of more than one view at a time, which may be critical for the physician for a given case.  FIG.  107    depicts this configuration, wherein color coded visual cues, indicators or icons  10071 ,  10072  and  10073  are used to indicate which of the three displays  10074 ,  10075  and  10076 , respectively, are active. In the present example, displays  10074  and  10075  are active, as shown by the flashing or highlighted colored icons  10071  and  10072 . Icon  10073  is not flashing or highlighted in the figure, thereby indicating that display  10076  is currently not active. One of ordinary skill in the art would appreciate that any other type of indication, such as the “Screen 1”, “Screen 2” etc. signs described above with reference to  FIGS.  104 ,  105 B and  106 B , may be used to highlight an active display. In one embodiment, letters “L”, “C”, “R” are used for indication—L for left camera, C for center camera, R for right camera. 
     In one embodiment, to activate or deactivate a screen, corresponding color coded buttons are provided on the endoscope handle  10080 . Thus, in continuation of the present example, buttons  10077 ,  10078  and  10079  are used to activate or switch to the corresponding display(s)  10074 ,  10075  and  10076 , respectively. More than one button may be pressed to activate the corresponding number of displays. In one embodiment, the action of “pressing and holding” a button initiates video recording on the corresponding display. Pressing the button one more time would end the recording. In another embodiment, separate buttons may be provided for video recording and image capture, which may be used after the desired screen(s) has been selected using one or more of the buttons  10077 ,  10078  and  10079 . 
     In another embodiment, a single button, such as the one shown in  10052  of  FIG.  105 A , may be used for selecting or activating more than one view at a time. Thus, for example, the button may be pressed once for the left view, again to go to the center view, again to go to the right, again to highlight left and center, again to highlight center and right, and again to highlight all of the three views. In one embodiment, only the “record” function is active when more than one view is selected, while other functions, such as zoom, are disabled. In another embodiment, zoom function is enabled, but allows for equal zoom in all the active views in case more than one view is active. Record and zoom buttons may be provided, similar to those shown in  FIGS.  105 A and  106 A . 
     It may be noted that button configurations exemplified in  FIGS.  105 A,  106 A and  107    may be combined into a single endoscopic handle to easily manage multiple functionalities of display and image manipulation such as toggling, image capture, video recording, freezing an image and zooming. Further, other image manipulation features not described above may be incorporated through buttons, knobs or switches in the endoscope handle. 
       FIG.  108    illustrates, through a flowchart, the process involved in implementing an image manipulation feature. Referring to  FIG.  108   , in the first step  10081  the user selects a feature, such as deciding on which channel or screen they wish to view/display information. This would require switching or toggling to the appropriate view. For this purpose, the user provides an input command in step  10082 , such as by pushing a button on the endoscope handle or by using the keyboard, mouse or touch screen. The input command is processed by dedicated hardware and software in step  10083 , and the corresponding output in the form of image or video is displayed in step  10084 . 
     The hardware components involved in image/video processing in response to user commands has already been described earlier with reference to  FIG.  90   . Referring now to  FIG.  90   , the remote commands  9014  include image and video manipulation commands, such as toggle between views, maximize/minimize, zoom, record, freeze, capture, etc. Thus, any inputs received from the endoscope  9010 , such as remote commands for image manipulation issued using the buttons on the endoscope handle, are processed through SOM  9026 . As mentioned earlier, the user may also issue image manipulation commands through keyboard, mouse or touch-screen. In this case also, the commands are processed by SOM  9026 . For recording a video or image, the FPGA  9023  appropriately processes the video or image and sends it for storage to the DDR memory  9033 . 
     It may, therefore, be noted from the above discussion that the primary software and hardware components for enabling and controlling on-screen display in response to user commands are the system on module (SOM)  9026  and the FPGA  9023 , respectively. As mentioned earlier, visual cues are provided on the display to assist a physician in selecting image manipulation features such as toggling between views, zoom, record, freeze, capture, etc. In one embodiment, international signs for recording, freezing and zooming might be positioned on the relevant monitors. Optionally, all the visual cues or only those for selected features may appear on the LCD touch screen  9055  on the main panel  9035  also. For example, confirmation that video is recording may appear on the main panel LCD screen  9055  only. 
     A common problem faced by the physicians operating an endoscope is that the viewing element in the endoscope tip may get embedded in tissue, thereby obstructing the view. In that case, a physician may not know which way to move in order to find the lumen (body cavity). With three viewing elements of the present specification, the likelihood of the view being obstructed reduces. However, it is still possible for the endoscope tip to get embedded in the tissue or become covered in body fluids in a way that the operating physician has no idea where to move the scope. 
     Further, during the course of an endoscopic procedure, the endoscope encounters junctures which cause the endoscope to change its direction of navigation substantially, and which would normally be not visible from only a front-pointing viewing element.  FIG.  109    illustrates critical navigation junctures (CNJs) that an endoscope is likely to encounter during a standard procedure such as ERCP (endoscopic retrograde cholangiopancreatography). Referring to  FIG.  109   , CNJ1  10091 , CNJ2  10092  and CNJ3  10093  are sharp turns within the body cavity which may, during navigation, obstruct the view of the endoscope. The definition of CNJs can be further expanded to include target areas of interest such as polyps, organ outlets, etc. 
     In order to assist the physician in navigation when faced with an obstruction and to help him or her to reposition the endoscope, in one embodiment, the present specification visually highlights the lumen (body cavity) on the image being displayed, so that the physician understands which way to proceed. An example of this is illustrated in  FIG.  110 A , wherein a circular ring  11001  highlights the area of interest when the endoscope  11002  is stuck at an odd angle. One of ordinary skill in the art would appreciate that any form of highlighting, such as a flashing border around the lumen, an arrow, or a different color may be used to point out the area of interest or the desired direction of navigation. Further, the highlighting feature can be further expanded to include target areas of interest such as polyps, organ outlets, etc. One such example is shown in  FIG.  110 A , where an arrow mark  11003  points towards a lesion  11004 . 
       FIG.  110 B  is a flowchart illustrating the steps involved in a method of visualizing a navigation pathway of an endoscope comprising a tip section having a front-pointing viewing element and two side-pointing viewing elements by using the highlighting feature described above. At step  11012 , the endoscope is inserted into a lumen of a body cavity. At step  11014 , the endoscope is navigated through the lumen, wherein the lumen defines a navigation pathway comprising a plurality of junctures in which the pathway changes substantially. Then, at step  11016  the endoscope is operated to display a video output from each of the front and side-pointing viewing elements on to at least one monitor, wherein the video output is representative of the navigation pathway within the body lumen. At step  11018 , at least one visual highlight is displayed on the monitor. The endoscope is then maneuvered through the lumen, at step  11020 , when obstructed by the plurality of junctures, wherein the maneuvering is guided by the visual highlight on the monitor. 
     In another embodiment, the system of the present specification further assists a physician in following best practices guidelines during an endoscopic procedure. It is known in the art that during an endoscopic procedure, such as colonoscopy, the physician first proceeds within the colon to the cecum. The physician then gradually pulls the endoscope back, from the cecum through the transverse colon, the rectum and out of the body, to look for anomalies such as polyps, lesions, etc. One of the best practices for GI doctors is to spend at least six minutes going from the cecum out of the body, in order to thoroughly investigate the path. 
     In order to facilitate the physician to demonstrate that they are following best practices guidelines as described above, in one embodiment, a timer button is provided on the handle. The button may be activated at the moment when the physician initiates withdrawal of the endoscope from the cecum. The activation of the button starts a clock which tracks the time taken in investigating the colon. In one embodiment, the timer appears on the display when counted and can visually show progression through an anatomical region based on time. In one embodiment, the timer starts at six minutes and counts down, which ensures that the minimum time required for investigation as per the best practices guidelines, is followed. 
     In one embodiment, in order to deliver a synchronized display from multiple viewing elements rapidly and in real-time to the physician, image data from each of the image sensors is processed in real-time and synchronized before display. Further, toggling and other image manipulation features are integrated or synced with image capture functionality. This is done in a manner that minimizes latency, yet ensures a high quality output. Thus, there is no time lag between the time a physician clicks to see a view and corresponding image capture and display. The video processing architecture of the present specification, as discussed earlier with reference to  FIG.  90   , achieves this purpose by implementing: 
     a) signal transmission/control for each viewing element in a manner that optimally shares resources; 
     b) processing of viewing element data, wherein data are separately processed to ensure no latency and then synchronized; and 
     c) transmitting the processed data for display in a manner that optimally shares resources. 
     In accordance with an aspect of the present specification, there is provided a service channel connector having a smooth internal surface which allows easy cleaning and disinfecting of the connector after use. There is also provided a service channel connector having channel dimensions that enable easy insertion of most medical instruments therethrough. 
       FIG.  111 A  illustrates an endoscope handle including a Y-shaped service channel connector, in accordance with an embodiment of the present specification. The handle  11100  comprises an umbilical tube/utility cable  11102  for connecting the endoscope to a main controller (such as main control unit  116  of  FIG.  1 A ), knobs  11104  for maneuvering a bending section of an insertion tube  11106  within a lumen, and a service channel port  11107 , among other components as described with respect to  FIG.  1 A . The service channel port  11107  is positioned within a handle of an endoscope, in the lower, distal portion of the handle, close to the insertion tube of an endoscope. The service channel connector (shown in  FIG.  111 B ) of the present specification is connected to the endoscopic handle via a service channel port  11107  and a suction channel resides within the endoscopic handle. 
       FIG.  111 B  illustrates a magnified view of the service channel connector  11108 , in accordance with an embodiment of the present specification. As shown, the service channel connector  11108  is approximately Y-shaped and, in one embodiment, comprises at its proximal end  11109  a service channel opening  11110  and a suction channel opening  11112 . A distal end  11114  of the connector  11108  is connected to the insertion tube  11106  via a working channel opening. The proximal end  11109  is connected to the service channel port  11107  of the handle  11100  through service channel opening  11110  and through a suction channel which runs along the umbilical tube and is connected to a suction pump. Medical instruments, such as snares needles, biopsy forceps etc., may be inserted through the service channel opening  11110  into the insertion tube  11106 , via the working channel opening. 
       FIG.  112    illustrates a conventional service channel connector. As shown, the service channel connector  11200  is approximately shaped as a ‘V’. The service channel connector  11200  comprises a top, proximal end  11202  and a bottom, distal end  11204 , where the proximal end  11202  is positioned toward the umbilical tube of the endoscopic device and the distal end is positioned toward the insertion tube of the endoscopic device. The proximal and distal ends  11202 ,  11204  are connected by a first wall  11206 , having a flat surface  11206   a  and two beveled edges,  11206   b  and  11206   c ; a second, flat wall  11208 , that assumes the approximate shape of a “V”; a third flat wall opposing the second wall, that also assumes the shape of a “V”; and, a fourth wall  11210  that opposes the first wall  11206  and has a flat surface  11210   a  and two beveled edges  11210   b  and  11210   c , on either side of flat surface  11210   a.    
     The top, proximate end  11202  comprises a circular service channel opening  11212 , which in one embodiment, has an internal diameter measuring approximately 2.5-5.5 millimeters, for insertion of medical instruments, such as snares, needles, biopsy forceps etc., into an insertion tube, and a circular suction channel opening  11214 . The second, distal end  11204  comprises a circular working channel opening having an internal diameter of approximately 2.5-5.5 millimeters where the working channel begins and exits in the scope tip. A length of the service channel connector  11200  measured from the proximate end  11202  to the distal end  11204  along first wall  11206  is approximately 10-16 millimeters. 
       FIG.  113 A  illustrates a service channel connector having an approximate Y-shape, in accordance with an embodiment of the present specification. In an embodiment, the service channel connector is manufactured in two separate portions which are then joined together.  FIGS.  113 B and  113 C  respectively illustrate the external and internal/cross sectional views of a first portion of the service channel connector shown in  FIG.  113 A , while  FIGS.  113 D and  113 E  respectively illustrate the external and internal/cross sectional views of a second portion of the service channel connector shown in  FIG.  113 A .  FIGS.  113 F and  113 G  respectively illustrate another internal/cross sectional view of the first and the second portions of the service channel connector, highlighting the regions that are joined together to obtain the complete service channel connector shown in  FIG.  113 A . 
     The service channel connector having an approximate Y-shape disclosed in the present specification is now described in detail with reference to  FIGS.  113 A,  113 B,  113 C,  113 D,  113 E,  113 F and  113 G . 
     As shown in  FIG.  113 A , the service channel connector  11300  has an approximate Y-shape. The service channel connector  11300  has a top, proximal end  11301  which houses a service channel opening  11302  and a suction channel opening  11304 . The service channel connector  11300  is positioned within a handle of an endoscope, in the lower, distal portion of the handle, close to the insertion tube of an endoscope, as shown in  FIG.  111 A . Referring now to  FIGS.  113 A and  113 C  simultaneously, a service channel  11302   a  and a suction channel  11304   a  are in fluid communication with each other and join to form a combined channel  11313 , ending in a working channel opening/exit  11306  having an internal diameter of approximately 2.5-8 millimeters. In one embodiment, a working channel opening/exit  11306  is positioned on a bottom, distal end  11303  of service channel connector  11300  and is circular. In one embodiment, working channel opening  11306  is connected to an insertion tube used for endoscopic examination. 
     U.S. Provisional Patent No. 61/917,530, entitled “Suction Control Unit for An Endoscope Having Two Working Channels” and filed on Dec. 18, 2013, is herein incorporated by reference in its entirety. 
     Referring to  FIG.  113 A , in one embodiment, the length of the service channel connecter  11300 , measured from the top, proximal end  11301  to the bottom, distal end  11303  along a wall  11310  is approximately 15-21 millimeters, which is longer than the length of the conventional connector  11200  shown in  FIG.  112   . In one embodiment, circular working channel opening/exit  11306  has an internal diameter of approximately 2.5-8 millimeters, which is larger than the diameter of the working channel of the conventional connector shown in  FIG.  112   . The increased length and diameter of the connector  11300  disclosed in the present specification enables smoother/easier insertion of larger medical instruments into the insertion tube of the endoscope, as compared to the conventional connector  11200 . 
     In some embodiments where a suction channel is not required, the service channel connector  11300  may be constructed without the suction channel  11304 . In some embodiments where two service channel ports are placed in the handle, to provide the user an endoscope with more than one service channel, the service channel connector  11300  may be constructed with two service channel openings  11302 . In one embodiment, the two service channel openings may have the same internal diameter. In another embodiment, the two service channel openings may have different internal diameters. 
     Referring simultaneously to  FIGS.  113 A,  113 B and  113 D , service channel connector  11300  comprises a front wall  11308  comprising a first portion  11308   a , a second portion  11308   b  and a third portion  11308   c . The first portion  11308   a  and the third portion  11308   c  are identical in shape, structure and size and are positioned on either side of the portion  11308   a  as shown in the figures, forming beveled edges for front wall  11308 . The front wall portions  11308   a  and  11308   c  are positioned at an angle with respect to the front wall portion  11308   b . Further referring to  FIGS.  113 A,  113 B and  113 D , service channel connector  11300  comprise a back wall  11310 , opposing the front wall  11308 , having a first portion with a flat surface  11310   a , a second portion with a flat surface  11310   b  and a third portion with a flat surface  11310   c . The first portion  11310   a  and the third portion  11310   c  are identical in shape, structure and size and are positioned on either side of the portion  111310   b  as shown in the figures, forming beveled edges for portion  11310 . Referring to  FIGS.  113 A,  113 B and  113 D  simultaneously, the service channel connector  11300  further comprises a first side wall  11312  and a second opposing side wall  11314 . 
     Referring to  FIG.  113 B , first portion  11308   a  of the front wall  11308  comprises four portions connected at an angle to one another:  11308   a   1 ,  11308   a   2 ,  11308   a   3 , and  11308   a   4 . The portion  11308   a   1  is connected with portion  11308   a   2 , portion  11308   a   2  is connected with portion  11308   a   3 , and the portion  408   a   3  is connected with portion  408   a   4 . 
     Referring to  FIG.  113 D , in an embodiment, the third portion  11308   c  of the front wall  11308  is identical in shape, structure and dimensions to the first portion  11308   a , comprising four indented portions  11308   c   1 ,  11308   c   2 ,  11308   c   3  and  11308   c   4 , identical to and connected to one another in the same fashion as portions  11308   a   1 ,  11308   a   2 ,  11308   a   3  and  11308   a   4  of first portion  11308   a.    
     Referring to  FIG.  113 B , the portion  11308   b  of the front wall  11308  comprises four portions connected at an angle to one another:  11308   b   1 ,  11308   b   2 ,  11308   b   3 , and  11308   b   4 . In an embodiment, the width of the front wall portion  11308  is approximately 4-8 millimeters. The portion  11308   b   1  is connected with portion  11308   b   2 ; portion  11308   b   2  is connected with portion  11308   b   3 ; and the portion  11308   b   3  is connected with portion  11308   b   4 . 
     Referring to  FIGS.  113 A and  113 D  simultaneously, in an embodiment, the opposing back wall  11310  comprises a first portion  11310   a , a second portion  11310   b , and a third portion  11310   c . In an embodiment, each of the three portions  11310   a ,  11310   b  and  11310   c  are substantially straight and rectangular in shape without any surface indentations. In an embodiment, the length of each of the three portions  11310   a ,  11310   b  and  11310   c  of the back wall  11310  is approximately in the range of 15-21 millimeters while the width of the portion  11310  is approximately in the range of 4-8 millimeters. 
     Referring to  FIGS.  113 A and  113 B  simultaneously, the first side wall  11312  comprises a first portion  11312   a , a second portion  11312   b  and a third portion  11312   c . In an embodiment, as shown, the first portion  11312   a  is wider at the proximal end  11301  and tapers towards the distal end  11303 . In an embodiment, a maximum width ee′ of the first portion  11312   a  is approximately in the range of 10-16 millimeters. The second portion  11312   b  is substantially rectangular and is joined with the first portion  11312   a  and the third portion  11312   c  at an angle. As shown in the figures, the third portion  11312   c  is also substantially rectangular and ends in the working channel opening at the distal end  11303  of the connector  11300 . In an embodiment, the total overall length of the portions  11312   a  (shown as if),  11312   b  (shown as ‘gg’) and  11312   c  (shown as ‘hh’), is approximately in the range of 15-21 millimeters. In the embodiment illustrated in  FIG.  113 A , portion  11312   a , when connected with the substantially rectangular portions  11312   b  and  11312   c , lends an approximate Y-shape to the connector  11300 . 
     Referring now to  FIGS.  113 A and  113 D  simultaneously, the second side wall  11314  is identical in shape, structure and design to the first side wall  11312 . The second side wall  11314  comprises a first portion  11314   a , a second portion  11314   b  and a third portion  11314   c . In an embodiment, as shown in  FIG.  113 D , the first portion  11314   a  is wider at a proximal end  11301   b  and tapering towards the distal end  11303   b . In an embodiment, a maximum width ee of the first portion  11314   a  is approximately in the range of 10-16 millimeters. The second portion  11314   b  is substantially rectangular and is joined with the first portion  11314   a  and the third portion  11314   c  at an angle. As shown in  FIG.  113 D , the third portion  11314   c  is also substantially rectangular and ends in the working channel opening at the distal end  11303   b  of the connector  400 . In an embodiment, the total lengths of the portions  11314   a ,  11314   b  and  11314   c  is approximately in the range of 15-21 millimeters. In the embodiment illustrated in  FIG.  113 D , the portion  11314   a  connected with the portions  11314   b  and  11314   c  lend an approximate Y-shape to the connector  11300 . 
       FIG.  113 B  illustrates an external cut-away view of a first section  11307  of the service channel connector  11300 , in accordance with an embodiment of the present specification. In an embodiment, the service channel connector  11300  of the present specification comprises two individually machined sections, a first section  11307  shown in  FIGS.  113 B and  113 C , and a second section  11309 , shown in  FIGS.  113 D and  113 E , that are joined together by a machining process to form the complete service channel connector  11300  illustrated in  FIG.  113 A . 
     Thus, as described below, the present specification provides a service channel connector, which, in one embodiment, is based on a two piece construction. The connector comprises two sections, both of which are constructed separately using a machining process such as a milling process. Separate construction of the two parts ensures that the internal walls of the parts are smooth and do not contain any edges or grooves that may retain residue. This enables the connector to be cleaned and disinfected thoroughly. The two sections, which are mirror images of each other, are placed on each other and are precisely aligned before being welded together. The joining of the two sections is performed precisely in a manner that eliminates any visible edges or gaps along the joint line. Hence, the risk of accumulation of residue along the joined edge is eliminated, thereby eliminating risk of contamination of the connector. 
     In an embodiment, each of the first section  11307  and the second section  11309  is constructed out of stainless steel material by using a machining process, and in one embodiment, a milling process. The milling process is a material removal process, which can create a variety of features on a part by cutting away the unwanted material. Milling is typically used to produce parts that are not axially symmetric and that have many features, such as holes, slots, pockets, etc. Further, in an embodiment, the two sections  11307 ,  11309  are joined by using a laser welding process in order to obtain the complete Y-shaped service channel connector  11300  illustrated in  FIG.  113 A . 
     In various embodiments, the two sections  11307 ,  11309  are mirror images of each other, and are placed together in precise alignment before joining. 
     In one embodiment, the first section  11307  illustrated in  FIG.  113 B  comprises a top proximate end  11301   a  comprising at least a portion of service channel opening  11302 /service channel  11302   a  and at least a portion of suction channel opening  11304 /suction channel  11304   a ; a bottom distal end  11303   a  comprising at least a portion of the working channel opening  11306 ; the first side wall  11312 ; the portion  11308   a  of the front wall  11308  comprising the four indented portions  11308   a   1 ,  11308   a   2 ,  11308   a   3  and  11308   a   4 ; at least a segment of front wall portion  11308   b , comprising segments of the four indented portions  11308   b   1 ,  11308   b   2 ,  11308   b   3  and  11308   b   4 ; and at least a segment of the opposing back wall  11310  comprising the portion  11310   a  and a segment of the portion  11310   b.    
       FIG.  113 C  illustrates an internal/cross-sectional view of the first section  11307  of the service channel connector  11300 , in accordance with an embodiment of the present specification. Referring to  FIG.  113 C , first section  11307  comprises a portion of the service channel  11302   a  and a portion of the suction channel  11304   a . The first section  11307  further comprises a combined channel  11313  where the service channel  11302   a  and the suction channel  11304   a  join resulting in the working channel opening/exit  11306 . In various embodiments, the working channel opening  11306  connects with an insertion tube of the endoscope. Medical instruments inserted into the service channel opening  11302 , and thus service channel  11302   a , enter the insertion tube via the working channel opening  11306 . The service channel  11302   a  has a broad first segment  11324  and a narrower second segment  11326  merging into the combined channel  11313 . In an embodiment, a diameter of the broad first segment  11324  is approximately in the range of 2.5-8 millimeters In an embodiment, the length of the combined channel  11313  enables large medical tools to be easily and smoothly inserted into an insertion tube of an endoscope through the service channel opening  11302  via the working channel opening  11306  due to the wider angle of portion  11316  compared to the angle found between portions  11204  and  11212  of  11200 , as described above with respect to  FIG.  112   . The length of the combined channel  11313  is adapted to allow a medical tool to be inserted into the insertion tube without harming the functionality of the device and allows for a wider angle therein so that the physician does not need to exert force when pushing the medical tool into the scope. 
     As seen in the cross-sectional internal view of the connector  11300  shown in  FIG.  113 C , the suction channel  11304  tapers and is thus reduced in diameter along the longitudinal axis of the connector  11300 . Referring to  FIG.  113 A , in an embodiment, a diameter of the opening of the suction channel  11304  located at the top/proximal end  11301  of the connector  11300  is adapted to clear blood clots, mucus, waste, etc. and manage high suction load when substances with high viscosity, large size, or a large amount of fluid such as coagulated blood, tissue pieces, mucus, waste, etc. in the lumen are suctioned. In an embodiment, the suction channel  11304   a  is narrower than the service channel  11302   a  and merges with the combined channel  11313  at the distal end  11303 . Referring to  FIG.  113 C , in an embodiment, the service channel  11302   a  and the suction channel  11304   a  are partially separated by a wall  11327  that defines the bordering outlines of service channel  11302   a  and suction channel  11304   a . Note that wall  11327  does not create a closed channel inside the connector  11300 . The combined channel  11313  ends in the working channel opening  11306  at the distal end  11303   a  of the connector  11300 . Since, the first section  11307  of the service channel connector  11300  is fabricated using a milling process, all the internal walls of the connector are smooth and do not contain any rough portions/niches where residue might accumulate leading to contamination. 
       FIG.  113 D  illustrates an external view of a second section  11309  of the service channel connector  11300 , in accordance with an embodiment of the present specification. In one embodiment, the second section  11309  comprises a top proximate end  11301   b  comprising at least a portion of service channel opening  11302 /service channel  11302   a  and at least a portion of suction channel opening  11304 /suction channel  11304   a ; a bottom distal end  11303   b  comprising at least a portion of the working channel opening  11306 ; the second side wall  11314 ; the portion  11308   c  of the front wall  11308  comprising the four indented portions  11308   c   1 ,  11308   c   2 ,  11308   c   3  and  11308   c   4 ; at least a segment of front wall portion  11308   b , comprising segments of the four indented portions  11308   b   1 ,  11308   b   2 ,  11308   b   3  and  11308   b   4 ; and at least a segment of the opposing back wall  11310  comprising the portion  11310   c  and a segment of the portion  11310   b.    
       FIG.  113 E  illustrates an internal/cross sectional view of the second section  11309  of the service channel connector  11300 , in accordance with an embodiment of the present specification. Referring to  FIG.  113 E , second section  11309  comprises a portion of the service channel  11302   a  and a portion of the suction channel  11304   a . The second section  11309  further comprises a combined channel  11313  where the service channel  11302   a  and the suction channel  11304   a  join resulting in the working channel opening/exit  11306 . The service channel  11302   a  has a broad first segment  11324  and a narrower second segment  11326  merging into the combined channel  11313 . In an embodiment, a diameter of the broad first segment  11324  is approximately in the range of 2.5-8 millimeters. In an embodiment, the length of the combined channel  11313  enables large medical tools to be inserted easily and smoothly into an insertion tube of an endoscope through the service channel opening  11302  through the combined channel  11313  and subsequently via the working channel opening  11306  due to the wider angle of portion  11316  compared to the angle found between portions  11204  and  11212  of  11200 , as described in detail above with respect to  FIG.  112   . The length of the combined channel  11313  is adapted to allow a medical tool to be inserted into the insertion tube without harming the functionality of the device and allows for a wider angle therein so that the physician does not need to exert force when pushing the medical tool into the scope. 
     As seen in the cross-sectional internal view of the connector  11300  shown in  FIG.  113 E , the suction channel  11304  tapers and is thus reduced in diameter, along the longitudinal axis of the connector  11300 . Referring to  FIG.  113 E , in an embodiment, the service channel  11302   a  and the suction channel  11304   a  are partially separated by a wall  11327  that defines the bordering outlines of service channel  11302   a  and suction channel  11304   a . Note that wall  11327  does not create a closed channel inside the connector  11300 . The combined channel  11313  ends in the working channel opening  11306  at the distal end  11303   b  of the connector  11300 . Since the second section  11309  of the service channel connector  11300  is fabricated using a milling process, all the internal walls of the connector are smooth and do not contain any rough portions/niches where residue might accumulate leading to contamination. 
     In an embodiment, the two sections  11307 ,  11309  of the service channel connector  11300  may be fabricated using an injection molding process, using materials suitable for the process such as metals, polymers, etc. 
     In an embodiment, the circular service channel opening  11302  has an internal diameter measuring approximately in the range of 2.5-8 millimeters, for insertion of medical instruments, such as snares, needles, biopsy forceps etc., into an insertion tube. Hence, the internal diameter of the working channel  11306  in the Y-shaped connector  11300  is greater than the internal diameter of the working channel of the conventional connector  11200  shown in  FIG.  112   . Due to the combination of a larger diameter of working channel  11306  and the Y-shape resulting from the long combined channel  11313  provided in the connector  11300 , large medical instruments, measuring approximately 2.8 millimeters, may also be smoothly inserted into the insertion tube of an endoscope. 
       FIG.  113 F  illustrates a cross-sectional view of the first section  11307  of the service channel connector showing edges that are welded, in accordance with an embodiment of the present specification. As shown, the first section  11307  comprises a region  11330  running along an edge adjacent to portion  11308   b  of front wall  11308 ; a region  11332  running along an edge adjacent to portion  11310   b  of back wall  11310 ; and a region  11334  which is a top/proximal portion of wall  11327 . In an embodiment, the length and width of regions  11330 ,  11332  and  11334  are adapted to provide a larger diameter service channel  11302   a , suction channel  11304   a  and working channel  11306 . 
       FIG.  113 G  illustrates another cross-sectional view of the second section  11309  of the service channel connector  11300  showing edges that are welded, in accordance with an embodiment of the present specification. As shown the second section  11309  comprises a region  11336  running along an edge adjacent to a portion of portion  11308   b  of front wall  11308 ; a region  11338  running along an edge adjacent to a portion of  11310   b  of back wall  11310 ; and a region  11340  which is a top/proximal portion of the wall  11327 . In an embodiment, the length and width of regions  11336 ,  11338  and  11340  are adapted to provide a larger diameter service channel  11302   a , suction channel  11304   a  and working channel  11306 . 
     After being precisely aligned, where region  11332  is aligned with region  11338 , region  11330  with region  11336 , and region  11334  with region  11340 , said regions are joined together by using a process such as laser welding. 
     Hence, the present specification provides a service channel connector, which, in one embodiment, is based on a two piece construction. The connector comprises two sections, both of which are constructed separately using a machining process such as a milling process. Separate construction of the two parts ensures that the internal walls of the parts are smooth and do not contain any edges or grooves that may retain residue. This enables the connector to be cleaned and disinfected thoroughly. The two sections, which are mirror images of each other, are placed on each other and are precisely aligned before being welded together. The joining of the two sections is performed precisely in a manner that eliminates any visible edges or gaps along the joint line. Hence, the risk of accumulation of residue along the joined edge is eliminated, thereby eliminating risk of contamination of the connector. Further, since the service channel connector of the present specification is constructed using a milling process, a Y-shape having a longer length and/or larger diameter of service channel, as compared to prior art connectors, is obtained. This enables larger medical instruments to be smoothly inserted via the service channel without having to increase the size of the connector substantially as compared to prior art connectors. 
     The above examples are merely illustrative of the many applications of the system of present invention. Although only a few embodiments of the present invention have been described herein, it should be understood that the present invention might be embodied in many other specific forms without departing from the spirit or scope of the invention. Therefore, the present examples and embodiments are to be considered as illustrative and not restrictive, and the invention may be modified within the scope of the appended claims.