Abstract:
A cooling system of a computed tomography (CT) system provides for a more efficient operation than known heretofore. The cooling system of the CT system includes a gantry and a table that moves an object into a bore of the gantry. The gantry includes part boxes mounted therein, and blade elements are formed in regions of the part boxes. The cooling system of the CT system includes a cooling method that includes a multiple cooling method including a stand-by mode and an operating mode.

Description:
CLAIM OF PRIORITY 
       [0001]    This application claims the benefit of priority from Korean Patent Application No. 10-2015-0021774, filed on Feb. 12, 2015, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. 
       BACKGROUND 
       [0002]    1. Field of the Disclosure 
         [0003]    The present disclosure relates to computed tomography (CT) systems that include a cooling system. 
         [0004]    2. Description of the Related Art 
         [0005]    With recent advances in medical technology, various methods of obtaining internal information of a living body have been developed. In particular, a tomography system is now widely used. With regard to tomography systems, a computed tomography (CT) system is now in widespread use. The CT system is a device for obtaining an image such that, after irradiating an X-ray toward an object from various angles, the X-ray that passes through the object is measured, and afterwards, the degree of absorption of the X-ray with respect to a cross-section is restructured to generate the image. In a general X-ray image, a three-dimensional (3D) shape of the object is displayed on a two-dimensional (2D) film. However, the CT system can display a 3D shape of a selected cross-section. Accordingly, various points of diagnosis that may not be found from a general X-ray image can be accurately determined if a 3D shape of a selected cross-section is displayed. Due to advantages such as the CT system being able to non-destructively and safely inspect an object, the CT system is widely used not only in medical fields but also in industrial fields to find an internal shape or density of an object. 
         [0006]    A gantry of the CT system may include various parts. X-ray generation parts and other various parts of the CT system included in the gantry individually include a cooling system. Each part mounted in the CT system includes at least one fan in a box to cool CT parts. The fans for respective parts and an exhaust fan of the gantry of the CT system may be sources of noise in the overall CT system, and thus, the durability of the CT system may be reduced. 
       SUMMARY 
       [0007]    The present disclosure provides at least one cooling system, cooling apparatus and cooling method of a computed tomography (CT) system, in which the cooling system has blade elements formed inside a gantry and methods of cooling the CT system. 
         [0008]    Additional aspects of the present disclosure will be set forth in part in the description which follows and, in part, will be apparent to a person of ordinary skill in the art from the description, and/or may be learned by practice of the presented embodiments by the person of ordinary skill in the art. 
         [0009]    According to an aspect of the present disclosure, in a cooling system of a CT system, the cooling system includes a gantry and a table that moves an object into a bore of the gantry, wherein the gantry comprises a part box mounted therein, and additionally includes blade elements that are formed/arranged in regions of the part box and control an air flow inside the gantry. 
         [0010]    The part box may include inlet holes and exhaust holes, and the blade elements may be formed/arranged in the inlet holes. 
         [0011]    One edge of each of the blades may be exposed on a surface of the part box through the inlet hole, and another edge of each of the blades extends towards an inner side of the inlet hole of the part box. 
         [0012]    The blade elements may be formed over the exhaust holes. 
         [0013]    The gantry may include a rotor unit that rotates with the bore as a center and a stator unit that does not rotate, and the part box may be mounted in the rotor unit. 
         [0014]    The blade elements may include a first blade formed in the rotor unit and a second blade formed in the stator unit. 
         [0015]    The first blade may be directly formed on a housing of the part box and the rotor unit. 
         [0016]    The cooling system of the CT system may further include an exhaust fan formed together with the at least one blade. 
         [0017]    The part box may include hardware such as an X-ray generator, an X-ray detector, and at least one of a data acquisition system (DAS), a power supplier, a heat exchanger (HX), an HVG, and a wireless transducer just to name some non-limiting examples. 
         [0018]    According to an aspect of another exemplary embodiment, a method of cooling the CT system described above includes a stand-by mode in which the gantry is cooled by exhaust fans mounted in the gantry in the event that a rotor unit of the gantry is not rotating; and an operating mode in which the gantry is cooled by blade elements formed inside the gantry when the rotor unit of the gantry rotates. 
         [0019]    In the operating mode, all of the exhaust fans or at least some of the exhaust fans may be stopped. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0020]    The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawings will be provided by the U.S. Patent and Trademark Office upon request and payment of the necessary fee. 
           [0021]    The above and/or other aspects of the present disclosure will become more better understood and more readily appreciated by a person of ordinary skill in the art from the following description of the exemplary embodiments, taken in conjunction with the accompanying drawings in which: 
           [0022]      FIG. 1  is a perspective view of a cooling system of a computed tomography (CT) system according to an embodiment of the disclosure; 
           [0023]      FIG. 2  is a plan view of inside of a gantry of the cooling system of a CT system according to an embodiment of the disclosure; 
           [0024]      FIG. 3A  and  FIG. 3B  are perspective views of blade elements formed parts mounted inside the gantry of the cooling system of a CT system according to an embodiment, wherein  FIG. 3A  is a perspective view with in holes in lateral sides of a parts box, and  FIG. 3B  shows the holes within front and rear sides of the part box; 
           [0025]      FIG. 3C  is a schematic drawing showing an air flow in the parts box due to the arrangement of blade elements; 
           [0026]      FIG. 4A  is a perspective view of blade elements respectively formed in an intake port and an exhaust port of a part box mounted inside the gantry of the cooling system of a CT system according to an embodiment of the disclosure; 
           [0027]      FIG. 4B  is a schematic view illustrating a principle of air flow when the blade elements are formed in the intake port and an exhaust port of  FIG. 4A ; 
           [0028]      FIG. 5  is a schematic drawing of a blade element mounted in a gantry of a cooling system of a CT system according to an embodiment of the disclosure; 
           [0029]      FIG. 6A  is a perspective view illustrating a stand-by mode of the cooling system in a method of driving a cooling system of the CT system according to an embodiment of the disclosure 
           [0030]      FIG. 6B  is a perspective view illustrating an operating mode of the cooling system in a method of driving a cooling system of the CT system according to an embodiment of the disclosure; and 
           [0031]      FIG. 7  is a schematic showing an overall configuration of a cooling system of a CT system according to an embodiment of the disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0032]    A cooling system of a computed tomography (CT) system will now be described in detail with reference to certain embodiments, examples of which are illustrated in the accompanying drawings. An artisan will understand and appreciate that the appended claims are not limited to the aspects of the disclosure shown in the drawings. In the drawings, like reference numerals refer to like elements throughout and elements having the same numeral may be formed of the same material. Also, in the drawings, sizes of elements may be exaggerated for convenience and clarity of explanation. 
         [0033]      FIG. 1  is a schematic perspective view of a CT system  100  according to an embodiment of the disclosure. 
         [0034]    Referring now to  FIG. 1 , the CT system  100  according to an embodiment may include a gantry  110  having a cylindrically shaped bore  112  in a center thereof and a table  120  that transports an object  122  (such as a patient) to be examined into and out of the bore  112  of the gantry  110 . The object  122  may be moved into the bore  112  of the gantry  110  by being positioned on the table  120 . The table  120  may be moved in various directions, for example, in at least one of up, down, left, and right directions in the course of capturing a CT image, and also, may be tilted or rotated at a predetermined angle in a particular direction. Also, the gantry  110  may be tilted in a specific direction by a desired predetermined angle. 
         [0035]    The object  122  may include a human or an animal, or part of a human or animal. For example, the object  122  may include organs such as a heart, liver, brain, breast, uterus, abdominal organ, spinal cord, or blood vessel. Also, the object  122  may include a phantom. The phantom may denote a material having a volume near to a density of a living thing and an actual effective atomic number, and may include a spherical phantom having a characteristic similar to a body. 
         [0036]    The gantry  110  may include a stator unit that does not rotate and a rotor unit that includes an X-ray generator and various parts. Parts included in the gantry  110  may be an X-ray generator, an X-ray detector, a data acquisition system (DAS), a power supply, a heat exchanger (HX), a high voltage generator (HVG), etc., and these parts may be mounted in a cover of the gantry  110 . When the CT system  100  is operated, the temperature inside the gantry  110  typically increases versus the temperature of a standby mode due to the operation of the parts in the gantry  110 . The increase in the temperature of the gantry  110  may be a cause of noise in the whole CT system  100 , and may reduce the durability of the whole CT system  100 . In the CT system  100  according to an embodiment, blade elements are formed in the parts, the stator unit, or the rotor unit to control air flow in the gantry  110 , and thus, the temperature of the gantry  110  may be maintained at an appropriate level so as not to cause discomfort to a patient or possibly damage the electronic equipment. 
         [0037]      FIG. 2  is a schematic plan view of inside of the gantry  110  of the CT system  100  according to an embodiment. 
         [0038]    Referring now to  FIG. 2 , the gantry  110  may include a rotor (i.e. rotor unit)  150  that rotate with respect to a stator  114 , and the rotor has the bore  112  as a center. The stator (i.e. stator unit)  114  is formed around the rotor unit  150  and does not move. Various parts for operating the CT system  100  may be mounted on the rotor unit  150 . For example, the parts may be an X-ray generator  11 , an X-ray detector unit  12 , and a DAS  16 . Besides the above hardware, a power supply, a heat exchanger (HX), a high voltage generator (HVG), and a wireless transducer may also be mounted on the rotor  150 . The parts in the gantry  110  may have a box-type external shape formed of, for example, a metal or plastic or a box-type housing. Hereinafter, in the embodiment, these are referred to as part boxes including the box-type and the housing mounted in the gantry  110 . 
         [0039]    Reference numerals  20 ,  22 ,  24 , and  26  indicate the various part boxes that may be mounted in the gantry  110 . The parts in the gantry  110  may generate heat during the operation of the cooling system of the CT system  100 . When the cooling system of the CT system  100  continuously operates at a high temperature, the durability and performance of the cooling system of the CT system  100  may be reduced, and thus, a cooling system to reduce the temperature is preferable and may be necessary. In order to maintain an inner temperature of the gantry  110  at an appropriate level, the external air may be taken into and circulated in the rotor unit  150  of the gantry  110  by receiving external air W 11  from at least a side of the gantry  110 , and the circulated air may be exhausted W 12  to the outside of the gantry  110 . In  FIG. 2 , as an example, it is depicted that the external air is supplied W 11  from a lower side of the gantry  110  and is exhausted W 12  to the upper side of the gantry  110 . However, the current embodiment is not limited thereto, that is, the direction of entering the external air and the direction of exhausting the external air are not specifically limited to the illustration of  FIG. 2 . 
         [0040]      FIGS. 3A and 3B  are perspective views of blade elements formed in parts mounted inside the gantry  110  of the cooling system of the CT system  100  according to an embodiment.  FIG. 3C  is a schematic drawing showing an air flow due to the blade elements. 
         [0041]    Referring now to  FIGS. 2 and 3A , a part box  30  mounted in the rotor unit  150  of the gantry  110  may include inlet holes  310  through which external air enters into the part box  30  and an exhaust hole  320  through which air in the part box  30  is exhausted to the outside of the part box  30 . The part box  30  may be mounted in the rotor unit  150  of the gantry  110 , and the rotor unit  150  may rotate in a clockwise direction with the bore  112  as a center. The part box  30  in the rotor unit  150  also rotates in the clockwise direction as it is mounted within the stator and rotates as the rotor  150  rotates. Each of the inlet holes  310  may include at least one blade element  300 . An edge of each blade element  300  may be exposed to a surface of the part box  30  through the inlet holes  310 , and another edge of each blade element  300  may be attached to an inner wall of the part box  30  by extending into the inlet holes  310  of the part box  30 . The blade element  300  may control the flow direction of air in the gantry  110 . External air may be supplied Wi into the part box  30  through the inlet holes  310  by the blade element  300 . The external air that circulates in the part box  30  to cool the part box  30  may be exhausted Wo to the outside of the part box  30  through the exhaust hole  320 . 
         [0042]    The blade element  300  may be formed in the inlet holes  310  of the part box  30 . And the inlet holes  310  may be formed at least in a region of the part box  30  but the location of the inlet holes  310  is not specifically limited to the location shown in the drawings. Also, the location of the exhaust hole  320  is not specifically limited to the location shown in the drawings. For example, the inlet holes  310  and the exhaust hole  320  may be formed on a lower surface  34 , a rear surface  36 , and a lateral surface  38  of the part box  30 . Also, the location of the exhaust hole  320  may be formed at least on a side of the part box  30 . In  FIG. 3A , as an example, the exhaust hole  320  is formed only in the lateral surface  38  of the part box  30 . In  FIG. 3B , a structure, in which exhaust holes  330  are formed on a front surface  32  of the part box  30  and exhaust holes  340  are formed on the rear surface  36  of the part box  30 , is shown. In this manner, external air may be supplied Wi into the part box  30  due to the at least one blade element  300  formed on the inlet holes  310  of the part box  30 , and the external air supplied into the part box  30  may exhaust Wo heat in the part box  30  to the outside through the exhaust holes  330  and  340 . 
         [0043]      FIG. 3C  shows a simulation result of air circulation in the part box  30  after external air is supplied Wi through the inlet holes  310  (the inlet holes  310  also shown in  FIGS. 3A and 3B . Here, the part box  30  is mounted in the rotor unit  150  of  FIG. 2  and is rotated at a speed of approximately 240 revolutions per minute (rpm). 
         [0044]    Referring now to  FIG. 3C , after entering through the inlet holes  310 , the external air may proceed towards the exhaust holes  350  while supplying air to the part box  30  due to blade elements  300 . The external air supplied to the part box  30  may move to the outside through the exhaust holes  350  after flowing F in the part box  30  to cool the part box  30 . At this point of the simulation, air in the part box  30  showed a mass flow of approximately 145 cubic feet per minute (CFM). 
         [0045]      FIG. 4A  is a perspective view of blades  400  respectively formed in an inlet hole  410  and an exhaust hole  420  of the part box  40  mounted inside the gantry of the cooling system of the CT system  100  according to an embodiment of the disclosure.  FIG. 4B  is a schematic view illustrating a principle of air flow when the blades  400  are formed in the inlet hole and the exhaust hole of  FIG. 4A . 
         [0046]    Referring now to  FIG. 2  and  FIG. 4A , at least one blade  400  may be formed on an inlet hole  410  of the part box  40  mounted in the rotor  150  of the gantry  110 . Also, at least another blade  402  may be formed on an exhaust hole  420  of the part box  40 . In  FIG. 4A , as an example, the inlet holes  410  are formed on a front surface  42  of the part box  40  and the exhaust holes  420  are formed on a rear surface  46  of the part box  40 , but the current embodiment is not limited to the arrangement shown and described. An edge of the blade  402  formed on the exhaust hole  420  may be exposed and fixed on a portion of an inlet of the exhaust hole  420  and another edge of the blade  402  may be formed by extending from the exhaust hole  420 . The blade  402  may be fixed on the exhaust hole  420  and on an inner surface of the part box  40 . The blades  400  and  402  respectively formed on the inlet holes  410  and the exhaust hole  420  may be bent to have curvatures, but such as structure is not limited the depiction in the drawings, and also, the shape and size of the elements are not specifically limited to the items shown. The number of blades  400  and  402  formed on the inlet holes  410  and the exhaust hole  420  is not specifically limited to any particular number. 
         [0047]    When the rotor  150  of the gantry  110  rotates, for example, in a clockwise direction, the part box  40  mounted on the rotor unit  150  also rotates in the same direction as it is attached to the rotor. 
         [0048]    Referring now to  FIG. 4B , as the part box  40  rotates according to the rotational movement of the rotor unit  150 , external air may be supplied Wi into the part box  40  through the inlet holes  410  and air in an inner space  42  of the part box  40  may be exhausted Wo to the outside of the part box  40  through the blade  402  formed on the exhaust hole  420 . The pressure of the inner space  42  of the part box  40  may be lower than regions of the inlet holes  410  and the exhaust hole  420 . 
         [0049]      FIG. 5  is a schematic drawing of a blade element mounted in the gantry  110  of the cooling system of the CT system according to an embodiment of the disclosure. Referring now to  FIG. 5 , the gantry  110  may include a rotor  150  that rotates, and the rotor  150  has a bore  112  as a center. A stator unit  114  that is formed around the rotor unit  150  does not rotate. Blades  220  may be formed on the rotor  150  of the gantry  110  and blades  116  may also be formed on the stator unit  114 . At least one blade may be respectively formed of the rotor  150  and the stator  114 . In this manner, the blade elements may be formed not only on a part box of the rotor unit  150 , but also may be directly formed on a housing of the rotor unit  150  and the stator unit  114 . 
         [0050]    The blades  220  formed on the part box or the housing of the rotor  150  may be referred to as a first blade element, and the blades formed on the stator  114  may be referred to as a second blade element. External air may be supplied W 11  in an inner direction of the gantry  110  from the outside of the gantry  110 , and may enter into the rotor  150  through the blade  220  of the rotor  150  or may be exhausted to the outside of the rotor  150  from the inside of the rotor  150 . The blade  116  formed on the stator  114  may exhaust W 12  the air in the stator unit to the outside. In this way, the blade elements respectively may be formed on the rotor  150  and the stator  114  of the gantry  110 , and blade elements formed on the rotor unit  150  may be formed on the part box or a housing region of the rotor  150 . The blades  220  and  116  of the rotor  150  and the stator  114  may be formed together with an additional exhaust fan. Also, exhaust fans may be optionally formed on the part boxes  30  and  40  shown in  FIGS. 3A, 3B, and 4A . However, the at least one exhaust fan mounted in the gantry  110  is not normally operated, and may be in a stand-by mode at which the rotor unit  150  of the gantry  110  is stopped until, for example, the temperature rises to a certain threshold. 
         [0051]      FIGS. 6A and 6B  are perspective views illustrating methods of driving a cooling system of the CT system  100  according to an embodiment.  FIG. 6A  shows a stand-by mode of the cooling system of the CT system  100 , and  FIG. 6B  shows an operating mode of the cooling system of the CT system  100 . 
         [0052]    Referring now to  FIGS. 5 and 6A , in the stand-by mode, the rotor  150  of the gantry  110  does not move (i.e. is not in a rotation state). In this state, an exhaust fan  60  mounted in a plurality of part boxes  11 ,  16 ,  20 ,  22 ,  24 , and  26  or in the gantry  110  is operated, and thus, external air may be supplied W 21  into the gantry  110  via the exhaust fan without rotation of the rotor. The inside of the gantry  110  may be cooled down by the low temperature air that is supplied from the outside, and the internal air of the gantry  110  may be exhausted W 22  to the outside of the gantry  110 . This cooling, in which the fan is operation while the rotor is stationary, is referred to as a stand-by mode cooling method. In the stand-by mode cooling method, the air circulation in the gantry  110  may be achieved while operating the exhaust fans in the gantry  110  together with the blades  220  and  116 , and thus, the cooling efficiency of the gantry  110  may be increased, yet no energy is expended to spin the rotor  150 . 
         [0053]    Referring now to  FIGS. 5 and 6B , in the operating mode, the rotor  150  of the gantry  110  may rotate, for example, in a clockwise direction. Along with the rotating movement of the rotor  150 , external air outside the gantry  110  may be supplied W 31  to the gantry  110  by the blades  220  and  116  in the gantry  110  and the blades formed in the plural part boxes  11 ,  16 ,  20 ,  22 ,  24 , and  26 . The inside of the gantry  110  may be cooled by the low temperature air supplied from the outside. Also, the internal air of the gantry  110  may be exhausted W 32  to the outside of the gantry  110 . At this point, the operation of all of the exhaust fans in the gantry  110  may stop or some of the exhaust fans  60  may continue to be operated. This mode of operation is referred to as an operating mode. Unlike the stand-by mode cooling method, in the operating mode, the noise or interference phenomenon due to the exhaust fans may be prevented by stopping the operation of the exhaust fans or by operating some of the exhaust fans of the gantry  110  and rotating the rotor, and thus, the cooling efficiency of the gantry  110  may be increased. 
         [0054]    In the cooling system of the CT system  100  according to an embodiment, the flow direction of air inside the gantry  110  may be controlled by forming blades on the rotor  150 , the stator  114 , or the part boxes  30  and  40 . The insides of the part boxes  30  and  40  may be cooled by forming blades in the part boxes  30  and  40 , such as, the X-ray generation unit  11 , an X-ray detection unit  12 , the DAS  16 , the power supply, the HX, the HVG, and the wireless transducer. Optionally, additional exhaust fans may not be formed on the part boxes  30  and  40 . In the cooling system of the CT system  100  according to an embodiment, an inner space of the gantry  110  may be more efficiently managed and operated by minimizing the number of fans mounted in the gantry  110 , and thus, noise of the CT system  100  may be prevented. Accordingly, the durability of the CT system  100  may be increased. 
         [0055]      FIG. 7  is a schematic showing an overall configuration of the cooling system of the CT system  100  according to an embodiment. 
         [0056]    Referring now to  FIGS. 1 and 7 , the cooling system of the CT system  100  according to an embodiment may include a gantry  110 , a table  120 , a controller  1200  including hardware configured for operation, such as an integrated circuit of a microprocessor or processor, a storage unit  1220  (i.e. a non-transitory memory), an image re-construction unit  1240 , an input  1260 , a display  1280 , and a communication unit  1300  including hardware such as a transmitter, receiver, transceiver and antenna. The object  122  may be positioned on the table  120 , and the table  120  may move in at least a predetermined direction and back, for example, up, down, left, and right directions by being controlled by the control unit  1200 . The gantry  110  may include an X-ray generator  11 , a collimator  14 , an X-ray detection unit  12 , a rotation driving unit  13 , a DAS  16 , and a data transducer  18 . The gantry  110  may include an annular type rotation frame  130  that is rotatable with respect to a predetermined rotation axis (RA). Also, the rotation frame  130  may have disc-shaped structure. The rotation frame  130  may include the X-ray generator  11  and the X-ray detector  12  that are respectively facing each other to have a predetermined field of view (FOV). Also, the rotation frame  130  may include an anti-scatter grid  15 . The anti-scatter grid  15  may be located between the X-ray generator  11  and the X-ray detector  12 . The rotation frame  130  may receive a driving signal from the rotation driving unit  13  and may rotate the X-ray generator  11  and the X-ray detector  12  at a predetermined speed. The rotation frame  130  may receive a driving signal and power from the rotation driving unit  13  in a contact method through, for example, a slip ring. The rotation frame  130  may receive a driving signal and power from the rotation driving unit  13  via wireless communication. 
         [0057]    In a medical imaging system, not only does an attenuated primary radiation signal form a useful image but also the scattered radiation that reduces the quality of image may be included in an X-ray that reaches the X-ray detector unit  12  (or photo-sensitive film). In order to transmit majority of the primary radiation and to attenuate the scattered radiation, the anti-scatter grid  15  may be located between the object  122  and the X-ray detector  12 . The anti-scatter grid  15  may be formed in a type in which interspace materials, such as, strips of a lead foil and a solid polymer material without a hollow or a solid polymer and a fiber composite material without a hollow are alternately stacked. However, the configuration of the anti-scatter grid  15  is not necessarily limited thereto. 
         [0058]    The object  122  may be moved into the bore  112  of the gantry  110  by being positioned on the table  120  and moving the table. An X-ray “L” generated from the X-ray generator  11  may be irradiated onto the object  122  through the collimator  14 , and the X-ray L that passes through the object  122  may be detected by the X-ray detector  12 , and thus, state information of the object may be obtained. 
         [0059]    The X-ray generator  11  may generate and emit an X-ray by receiving a voltage and a current, for example, from a power distribution unit (PDU) through a high voltage generation unit via a slip ring. When the high voltage generation (HVG) unit applies a predetermined voltage, the X-ray generator  11  may generate X-rays having a plurality of energy spectrums corresponding to the predetermined voltage. The X-rays generated from the X-ray generator  11  may be emitted as a predetermined state by the collimator  14 . The X-ray generator  11  may be configured to include various X-ray generation structures, and may include a plurality of electron emission sources. For example, the X-ray generator  11  may include electron emission sources that may emit electrons and an electrode that may emit X-rays due to the collision between emitted electrons and is formed of a conductive material. The electron emission sources may be formed of a material that may emit electrons, for example, a metal, silicon, an oxide, diamond, diamond like carbon (DLC), a carbon compound, a nitrogen compound, carbon nanotube, etc. The X-ray generator unit  11  may be formed by including a plurality of electron emission sources formed as a ring type. The X-ray generator  11  may change its location during an operation of the gantry  110  but may be fixedly disposed not to be rotated. Also, the X-ray generator  11  may be configured so that an electron gun may irradiate an X-ray in a direction towards the bore  112  of the gantry  110 . However, the configuration of the X-ray generator  11  is not limited thereto, that is, may be any configuration as long as the X-ray generator  11  may emit an X-ray. 
         [0060]    The X-ray detector  12  may include one or a plurality of X-ray detectors to detect an X-ray that is radiated from the X-ray generator  11  and is passed through the object  122  through the collimator  14  and the X-ray detectors may form an array structure. The X-ray detectors may form a single channel, but is not limited thereto. The X-ray detectors  12  may include a multi-layer structure including a semiconductor layer and an electrode. The X-ray detectors  12  may be formed as a ring shape as the same shape as the X-ray generator  11  on a lateral of the X-ray generator  11 . The X-ray detector unit  12  may change its location during an operation of the gantry  110  but may be fixedly disposed not to be rotated. Also, the X-ray detector  12  may detect an X-ray that is generated from the X-ray generator  11  and is transmitted through the object  122  and may generate an electrical signal corresponding to the intensity of the detected X-ray. 
         [0061]    The X-ray detector  12  may be connected to the DAS  16 . An electrical signal generated from the X-ray detector  12  may be collected by the DAS  16 . The electrical signal generated by the X-ray detector  12  may be collected at the DAS  16  either with or without wire. Also, the electrical signal generated by the X-ray detector  12  may be provided to, for example, an analogue/digital converter through an amplifier. Only some of data collected from the X-ray detector  12  may be provided to the image re-construction unit  1240  according to slice thicknesses or number of slices, or some of the data may be selected by the image re-construction unit  1240 . The digital signal may be provided to the image re-construction unit  1240  through the data transducer  18 . The digital signal may be transmitted to the image re-construction unit  1240  through the data transducer  18  either with or without wire. 
         [0062]    The control unit  1200 , which comprises hardware configured for operation may control an operation of each module of the cooling system of the CT system  100 . For example, the control unit  1200  may control operations of the table  120 , the collimator  14 , the rotation driving unit  13 , memory  1220 , the image re-construction unit  1240 , the input  1260 , the display  1280 , and the communication unit  1300 . The image re-construction unit  1240  may receive data (for example, pure data before processing) obtained by the DAS  16  through the data transducer  18 , and may perform a pre-processing process. The pre-processing may include a process of correcting non-uniform sensitivity between channels and a process of correcting signal loss due to rapid reduction of signal intensity or an X-ray absorbent, such as, a metal. An output data of the image re-construction unit  1240  may be referred to as a raw data or a projection data. The projection data may be stored in the storage unit  1220  together with image capturing conditions (for example, a tube voltage, an image capturing angle, etc.) when the image is captured. The projection data may be a set of data values corresponding to the intensities of X-rays that have passed through the object  122 . The storage unit  1220  may include a storage medium at least one of a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (SD, XD memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disc, and an optical disc, just to name a few non-limiting possibilities. 
         [0063]    Also, the image re-construction unit  1240  may reconstruct cross-sectional images of the object  122  by using an obtained projection data set. The cross-sectional image may be 3 dimensional (3D) images. In other words, the image re-construction unit  1240  may generate a 3D image of the object  122  by using a cone beam reconstruction method based on the obtained projection data set. An external input with respect to X-ray tomography conditions, image processing conditions, etc. may be received through the input  1260 . For example, the X-ray tomography conditions may include a plurality of tube voltages, the setting of energy values of a plurality of X-rays, the selection of shooting protocols, the selection of method of image reconstruction, the setting of a FOV region, the number of slices, slice thicknesses, and the setting of parameters for image post-processing, etc. Also, the image processing condition may include the resolution of image, the setting of attenuation coefficient with respect to an image, and the setting of combination ratio of the image, etc. The input unit  1260  may include a device for receiving an application of a predetermined pressure from the outside. For example, the input  1260  may include a microphone, a keyboard, a mouse, a joystick, a touch pad, a touch pen, a voice, and a gesture recognition device, etc. The display  1280  may display an image restructured by the control image re-construction unit  1240 . Transmission and reception of data or power between the elements described above may be performed by using at least one of wires, wireless, and optical communication. The communication unit  1300  may perform communications with an external device or an external medical device through a server  1400 . 
         [0064]    In the cooling system of a CT system according to an embodiment, blade elements are formed on part boxes, a rotor, or a stator of a gantry, and thus, an air flow in the gantry may be controlled. 
         [0065]    In the cooling system of a CT system according to an embodiment, the number of fans formed inside the gantry is minimized, and thus, an inner space of the gantry is efficiently managed and operated. Also, the noise problem of the cooling system of a CT system is reduced and the durability of the CT system is increased. 
         [0066]    While a cooling system of a CT system according to THE embodiment has been described with reference to the figures. However, it will be understood by those of ordinary skill in the art that the embodiments should be considered in descriptive sense only and not for purposes of limitation. Also, it should be understood, however, that the appended claims are not limited to the embodiments shown and disclosed herein, but on the contrary, the appended claim include all modifications, equivalents, and alternatives falling within the scope of the disclosure as understood by a person of ordinary skill in the art. 
         [0067]    The apparatuses and methods of the disclosure can be implemented in hardware, and in part as firmware or via the execution of software or computer code in conjunction with hardware that is stored on a non-transitory machine readable medium such as a CD ROM, a RAM, a floppy disk, a hard disk, or a magneto-optical disk, or computer code downloaded over a network originally stored on a remote recording medium or a non-transitory machine readable medium and stored on a local non-transitory recording medium for execution by hardware such as a processor, so that the methods described herein are loaded into hardware such as a general purpose computer, or a special processor or in programmable or dedicated hardware, such as an ASIC or FPGA. As would be understood in the art, the computer, the processor, microprocessor controller or the programmable hardware include memory components, e.g., RAM, ROM, Flash, etc., that may store or receive software or computer code that when accessed and executed by the computer, processor or hardware implement the processing methods described herein. In addition, it would be recognized that when a general purpose computer accesses code for implementing the processing shown herein, the execution of the code transforms the general purpose computer into a special purpose computer for executing the processing shown herein. In addition, an artisan understands and appreciates that a “processor”, “microprocessor” “controller”, or “control unit” constitute hardware in the claimed disclosure that contain circuitry that is configured for operation. Under the broadest reasonable interpretation, the appended claims constitute statutory subject matter in compliance with 35 U.S.C. §101 and none of the elements are software per se. No claim element herein is to be construed under the provisions of 35 U.S.C. 112, sixth paragraph, unless the element is expressly recited using the phrase “means for”. 
         [0068]    The definition of the terms “unit” or “module” as referred to herein are to be understood as constituting hardware circuitry such as a CCD, CMOS, SoC, AISC, FPGA, a processor or microprocessor (a controller) configured for a certain desired functionality, or a communication module containing hardware such as transmitter, receiver or transceiver, or a non-transitory medium comprising machine executable code that is loaded into and executed by hardware for operation, in accordance with statutory subject matter under 35 U.S.C. §101 and do not constitute software per se. For example, the image processor in the present disclosure, and any references to an input unit and/or an output unit both comprise hardware circuitry configured for operation.