Source: https://patents.google.com/patent/JP5597183B2/en
Timestamp: 2020-02-17 03:48:12
Document Index: 262105600

Matched Legal Cases: ['art 110', 'art 120', 'art 130', 'art 140', 'art 141', 'art 150']

JP5597183B2 - Imaging device, control device, imaging device control method, control method, and computer program - Google Patents
Imaging device, control device, imaging device control method, control method, and computer program Download PDF
JP5597183B2
JP5597183B2 JP2011286325A JP2011286325A JP5597183B2 JP 5597183 B2 JP5597183 B2 JP 5597183B2 JP 2011286325 A JP2011286325 A JP 2011286325A JP 2011286325 A JP2011286325 A JP 2011286325A JP 5597183 B2 JP5597183 B2 JP 5597183B2
JP2011286325A
JP2012061349A5 (en
JP2012061349A (en
2011-12-27 Priority to JP2011286325A priority Critical patent/JP5597183B2/en
2012-03-29 Publication of JP2012061349A publication Critical patent/JP2012061349A/en
2012-07-05 Publication of JP2012061349A5 publication Critical patent/JP2012061349A5/ja
2014-10-01 Publication of JP5597183B2 publication Critical patent/JP5597183B2/en
The present invention, in order to photograph the eye bottom, the angle of irradiation to the scanning position (anterior segment scanning the illuminated position of the fixation lamp, the measurement light in the eye bottom for guiding the orientation of the visual line of the eye ) that determine the imaging device, the control device, a control method, a control method of the imaging apparatus, and relates to a computer program.
An optical coherence tomography (OCT) for ophthalmology is capable of observing the state inside the retinal layer three-dimensionally and is useful for more accurately diagnosing diseases. Used by ophthalmologists.
In imaging using this optical coherence tomography, a fixation lamp is turned on and a predetermined position of the fundus is guided near the optical axis of the optical system of the optical coherence tomography (see Patent Document 1). .
JP 2007-275374 A
However, in the disclosed technique of Patent Document 1, in order to match the position on the fundus of the measurement light scanned two-dimensionally on the fundus with a predetermined position, a desired position on the fundus is fixed with a fixation lamp . It is necessary to guide near the optical axis of the optical system including the optical path . At this time , when the interval between the fixation lamps is sparse, it may be difficult to guide a predetermined position of the fundus near the optical axis of the optical system including the optical path of the measurement light .
In order to solve the above problems, an imaging device according to one embodiment of the present invention provides:
An imaging device that acquires an image of the eye to be inspected based on return light from the eye to be inspected that has been irradiated with measurement light through a scanning unit,
Instruction acquisition means for acquiring an instruction for the position of a part of the fundus image of the eye to be examined at the first lighting position of the fixation lamp;
According to the instructed position and the first lighting position, a second lighting position of the fixation lamp, and an angle at which the measurement light is applied to the anterior eye portion of the eye to be examined through the scanning unit, Determining means for determining.
In order to solve the above problem, an imaging device according to one embodiment of the present invention is provided.
First determining means for determining a second lighting position of the fixation lamp in response to an instruction for a position of a part of the fundus image of the eye to be examined at the first lighting position of the fixation lamp;
Second determining means for determining an angle at which the measurement light is applied to the anterior segment of the eye to be examined via the scanning means according to the instructed position and the determined second lighting position; Have.
In order to solve the above-described problem, a method for controlling an imaging device according to one embodiment of the present invention includes:
A control method for an imaging apparatus that acquires an image of the eye to be inspected based on return light from the eye to be inspected that has been irradiated with measurement light via a scanning means,
The imaging device obtaining an instruction for a position of a part of the fundus image of the eye to be examined at a first lighting position of the fixation lamp;
In accordance with the instructed position and the first lighting position , the imaging device sends the measurement light to the anterior eye part of the eye to be examined via the second lighting position of the fixation lamp and the scanning unit. And determining the angle of irradiation.
The imaging device determining a second lighting position of the fixation lamp in response to an instruction for a position of a part of the fundus image of the eye to be examined at the first lighting position of the fixation lamp;
A step of determining an angle at which the imaging device irradiates the anterior eye part of the eye to be examined via the scanning unit according to the instructed position and the determined second lighting position; And having.
In order to solve the above problems, a control device according to one aspect of the present invention is provided.
Second determining means for determining an angle at which the measurement light is applied to the anterior eye portion of the eye to be examined via a scanning means according to the instructed position and the determined second lighting position; Have.
In addition, a control method according to an aspect of the present invention for solving the above-described problem is
A control method for a control device, comprising:
The control device determining a second lighting position of the fixation lamp in response to an instruction for a position of a part of the fundus image of the eye to be examined at the first lighting position of the fixation lamp;
The control device determining an angle of irradiating measurement light to the anterior segment of the eye to be examined via a scanning unit according to the instructed position and the determined second lighting position; Have
According to the present invention, when photographing the fundus using measurement light that is two-dimensionally scanned on the fundus, the lighting position of the fixation lamp and the scanning position for scanning the measurement light on the fundus (on the anterior eye portion) The irradiation angle) can be easily determined .
It is a figure which shows the function structure of the tomogram imaging apparatus 10 which concerns on 1st Embodiment. It is a flowchart which shows the process sequence of the tomographic imaging apparatus 10 which concerns on 1st Embodiment. It is a figure which shows the function structure of the tomogram control acquisition part 110 which concerns on 1st Embodiment. It is a figure explaining the relationship of the fixation lamp lighting position which concerns on 1st Embodiment, an imaging | photography site | part, and a scanning position. It is a figure which shows the example of the fixation lamp projection angle table | surface which concerns on 1st Embodiment. It is a flowchart which shows the process sequence of the tomographic imaging apparatus 10 which concerns on 2nd Embodiment. It is a flowchart which shows the process sequence of the tomographic imaging apparatus 10 which concerns on 3rd Embodiment.
The tomographic imaging apparatus 10 in the present embodiment presents the current fundus image of the object to be measured to the operator. Then, the lighting position of the fixation lamp is controlled according to the position designated on the fundus image by the operator and the position of the measurement light of the tomographic imaging apparatus 10. Further, the scanning position is controlled so that the measurement light scans the position on the retina that is the fundus.
FIG. 1 is a functional block diagram of the tomographic imaging apparatus 10. The tomographic imaging apparatus 10 shown in the figure includes a tomographic image acquisition unit 110, an instruction acquisition unit 120, a storage unit 130, a control unit 140, and a display unit 150.
The tomographic image acquisition unit 110 scans the retina of the eye to be examined (sometimes referred to as “fundus”) with the measurement light, detects the combined light obtained by combining the return light from the retina and the reference light, Obtain a tomographic image of the retina.
The instruction acquisition unit 120 acquires an instruction of a shooting position from an operator (not shown). The storage unit 130 holds a tomographic image of the eye to be examined and imaging control parameters used for capturing the tomographic image.
The control unit 140 having a control CPU includes a fixation lamp setting unit 141 and a scanning position setting unit 142, and captures tomographic images such as fixation lamp lighting position information, scanning position of measurement light, and scanning speed. Parameters are set and imaging control is performed.
A computer program for controlling the CPU (computer) of the control unit 140 is stored and a work memory (not shown) is provided to control the entire imaging operation of the tomographic imaging apparatus 10 according to the computer program. This computer program can be installed by a storage medium (not shown).
The display unit 150 displays a tomographic image of the eye to be examined, a fundus image, an imaging control parameter, and the like.
Next, the flow of processing executed by the control unit 140 by controlling the layer image capturing apparatus 10 will be described with reference to the flowchart of FIG.
In step S210, the fixation lamp setting unit 141 sets an initial fixation lamp lighting position.
The fixation lamp lighting position is set to a predetermined fixation lamp lighting position, but may be set to an initial fixation lamp lighting position instructed by the operator.
Further, in step S210, the control unit 140 sets other parameters (scanning speed, acquisition rate, etc.) necessary for tomographic image capturing.
The initial fixation lamp lighting position information and tomographic image capturing parameters are transferred to the storage unit 130 and stored.
In step S220, the tomographic image acquisition unit 110 acquires a fundus image at the fixation lamp lighting position set in step S210. Here, acquisition of a fundus image from a 3D wide-area tomographic image will be described.
First, the tomographic image acquisition unit 110 is configured by Fourier domain OCT in this embodiment.
FIG. 3 shows a functional configuration of the tomographic image acquisition unit 110. The tomogram acquisition unit 110 turns on the designated position of the fixation lamp 311 according to the fixation position information of the fixation lamp transferred from the control unit 140.
The light of the fixation light that has been lit is projected onto the retina of the eye 314 via the lens 312, the half mirror 313 and the objective lens. Further, the control unit 140 controls the galvano mirror driving mechanism 304 according to the transferred scanning position information, and the galvano mirror driving mechanism 304 drives the galvano mirror 305.
Although not shown, the galvanometer mirror 305 includes two mirrors capable of main scanning and sub scanning. The low coherence light source 301 generates a low coherence light beam as measurement light. This light beam is split by the half mirror 302 into measurement light that goes to the eye 314 via the lens 306 and reference light that goes to the reference mirror 303 that is fixedly arranged.
Next, interference light is generated by superimposing the measurement light and the reference light reflected by the eye 314 and the reference mirror 303, respectively. The interference light is input to the image reconstruction unit 307, and the image reconstruction unit 307 reconstructs a tomographic image of the retina (sometimes referred to as “fundus”) from the interference light.
The reconstructed tomographic image is transferred to the storage unit 130 or the control unit 140. In FIG. 3A, 317 indicates the optical axis of the lens 306.
Then, the tomogram acquisition unit 110 performs main scanning on the retina at a plurality of sub-scanning positions to acquire a 2D tomogram. A wide-area 3D tomographic image is acquired by performing main scanning and sub-scanning with a wide angle of view. Furthermore, using the wide-area 3D tomographic image, a projection image obtained by integrating the tomographic images in the depth direction (Z-axis direction) is created, and a fundus image is acquired.
The fundus image acquired in step S220 is transferred to the storage unit 130 and the display unit 150.
In addition, in order to acquire a fundus image, the tomographic image acquisition apparatus 110 may be provided with an SLO, an infrared camera, or the like, thereby capturing a 2D image of the fundus and acquiring the fundus image.
In step S230, the display unit 150 presents the fundus image acquired in step S220 to the operator.
In step S240, the instruction acquisition unit 120 acquires an instruction of a shooting position from the operator. Here, the operator selects a predetermined position in the fundus image displayed in step S230 by using a mouse, a touch screen, or the like.
In step S250, the fixation lamp setting unit 141 of the control unit 140 fixes the predetermined position on the bottom image acquired in step S240 so as to come to the imaging position where the measurement light of the tomographic image acquisition unit 110 is irradiated. Reset the lighting position.
In the present embodiment, since the fundus image is acquired from the tomographic image, the projection angle of the measurement light at each position of the fundus image is obtained at the time of capturing the tomographic image.
FIG. 3B shows an example of the fixation lamp 311. The panel 316 of the fixation lamp 311 is composed of a matrix of 8 × 10 LEDs (point light sources) 315.
The fixation lamp driving mechanism 310 lights the LED at the fixation lamp lighting position (x, y) set by the fixation lamp setting unit 141. FIG. 3B shows an example in which the fixation lamp lighting position (4, 3) is lit.
Next, the relationship between the fixation lamp lighting position and the measurement light photographing position will be described with reference to FIG. 4A and 4B are views of the eye to be examined as viewed from the side, and as shown in FIG. 4C, the eyebrows of the eye 314 to be examined are examples on the eye to be examined.
The vertical direction is called the Y direction. Hereinafter, in order to simplify the description, the fixation lamp lighting position setting in the Y direction will be described, but the fixation lamp lighting position setting in the XY plane can be similarly described.
Here, the main scan of the tomographic image acquisition apparatus is performed in the X direction, and the sub-scan is performed in the Y direction.
In FIG. 4A, to simplify the explanation, it is assumed that 311b is an image of the fixation lamp 311 formed from the lens 312, the half mirror 313, and the lens 306 as a sample.
The measurement light 400 passes through the galvanometer mirror 305 and the lens 306 toward the eye 314 to be examined. Further, the light is projected onto the retina 402 (sometimes referred to as “fundus”) through the cornea of the eye 314 to be examined and the crystalline lens 401.
The LED 403 on which the fixation lamp 311b is lit is projected onto the retina 402 through the cornea of the eye 314 to be examined and the crystalline lens 401. The light beam of the LED 403 to be projected is referred to as a fixation lamp projection light 404. The fixation lamp guides the direction of the eye to be examined. When the subject looks at the LED 403 of the fixation lamp, the projection position of the fixation lamp corresponds to the macular 406. That is, the line of sight is guided so that the macula is located at a position corresponding to the projection position on the retina of the fixation lamp.
Further, an angle formed by the fixation lamp projection light 404 and the optical axis 317 of the lens 306 is referred to as a fixation lamp projection angle 405. An angle formed by the measurement light 400 and the optical axis 317 is referred to as a measurement light projection angle 408. Further, an angle formed by the measurement light 400 and the fixation lamp projection light 404 is referred to as a fixation disparity angle 407.
Here, the relationship between the fixation lamp lighting position and the fixation lamp projection angle 405 can be acquired in advance to form a fixation lamp projection angle table.
FIG. 5 is an example of a fixation lamp projection angle table. In this example, in order to create the fixation lamp projection angle table, the fixation lamp projection angle is measured in advance with an actual apparatus. Alternatively, the calculation may be performed using design values of the configuration of the tomographic image acquisition unit 110 (the size of the fixation lamp 311, the arrangement position of the LED 403 of the fixation lamp 311, the lens 312, the half mirror 313, the objective lens 306, etc.). it can.
FIG. 4B shows a tomographic image projection image 412 (fundus image) of the retina of the eye 314 to be examined fixed using the initial fixation lamp lighting position 413. As shown in FIG. 4B, when the operator designates the imaging position 410 on the fundus image 412, the angle between the measurement position 409 of the retina and the straight line passing through the crystalline lens 401 and the optical axis 317 of the tomographic imaging unit. RaOca is obtained by Equation 1 as an angle 411. The fixation lamp setting unit 141 can obtain an angle 411 as RaOca using the fundus image 412 and the designated position 410.
However, the fundus image size is the size of the fundus image 412, the designated position processing is the distance from the center of the fundus image 412 to the designated position 410, and the fundus image angle of view is the angle of view when the fundus image is captured.
For example, when the fundus image angle of view is 30 °, the fundus image size is 480 pixels, and the designated position distance is 120 pixels, the angle 411 is 7.5 °.
Further, the projection angle FpaL1 of the initial fixation lamp lighting position is acquired from the fixation lamp projection angle table.
From the angle 411 and the initial fixation lamp lighting position, Rpa which is a fixation disparity angle of the macular from the photographing position is obtained as an angle 407 by the following formula 2. Here, FpaL1 is the initial fixation lamp projection angle 405.
Rpa = RpOca + FpaL1 (Formula 2)
Next, the fixation lamp setting unit 141 selects a fixation lamp projection angle close to 407 from the fixation lamp projection angle table so that the imaging position 409 is near the optical axis of the tomographic image acquisition unit 110. Then, the fixation lamp lighting position at the fixation lamp projection angle is selected, and the fixation lamp lighting position is reset.
Although the setting of the position of the fixation lamp has been described above, the setting of the fixation lamp at the x position can be similarly performed.
In step S260, the scanning position setting unit 142 of the control unit 140 sets the scanning position so that the measurement light scans the position of the instructed part.
Using the fixation lamp projection angle 405 reset in step S250 and the fixation disparity angle 407 of the macular from the photographing position, the measurement light projection angle 408 can be calculated using the following Equation 3.
Ba = Fpa-Rpa (Formula 3)
However, Ba is a measurement light projection angle, Fpa is a fixation lamp projection angle, and Rpa is a fixation deviation angle from the macula.
The scanning position setting unit 142 controls the galvanometer mirror 305 so that the measurement light projection angle 408 is Ba. At this time, the scanning position setting unit 142 adjusts the scanning position in a range narrower than the interval between the fixation lamp lighting positions.
Then, the fixation lamp lighting position information determined in step S250 and the scanning position (measurement light projection angle) determined in step S260 are transferred to the tomographic image acquisition unit 110 and the storage unit 130.
According to the configuration described above, the fundus image of the object to be measured is acquired using the tomographic imaging apparatus, and the shooting instruction on the acquired fundus image is acquired, thereby corresponding to the specified position on the fundus image. The fixation lamp lighting position and scanning position for photographing the retina position can be easily set.
In the first embodiment, the operator has to specify a position for shooting on the fundus image. In this embodiment, an instruction of an imaging region and position is acquired from an operator, and the lighting position and scanning position of the fixation lamp are controlled so that the specified imaging position imaging is in the vicinity of the optical axis of the tomographic image acquisition unit. .
Since the configuration of the image processing apparatus 10 according to the present embodiment is the same as that of the first embodiment, description thereof is omitted.
Next, a specific processing procedure executed by the tomographic imaging apparatus 10 of the present embodiment will be described with reference to the flowchart of FIG.
In step S <b> 610, the instruction acquisition unit 120 acquires instruction information on the tomographic imaging position for the retina of the eye to be examined, which is input by an operator (not shown). In the present embodiment, a position opposite to the macula is designated as the photographing position. Here, the position relative to the macula will be described as an example. This instruction is input by the operator via a keyboard or mouse (not shown) provided in the tomographic imaging apparatus 10. The obtained instruction is transmitted to the control unit 140.
In step S620, the fixation lamp setting unit 141 of the control unit 140 sets the lighting position of the fixation lamp so that the imaging position of the instruction acquired in step S610 is near the optical axis of the tomographic image acquisition unit 110.
Here, it is assumed that the shooting position of the instruction acquired in step S610 is the position of 12 ° in the Y direction of the macula. As can be seen from FIG. 4A, an angle 407 (an angular distance from the macula) constituting a straight line passing through the retinal imaging position 409 and the lens 401 and a straight line passing through the macula and the lens 401 is 12 °. Then, in order for the retinal photographing position 409 to be close to the optical axis 317, a fixation lamp lighting position having a fixation lamp projection angle 405 closest to the angle 407 may be set.
Looking at the fixation lamp projection angle table of FIG. 5, the fixation lamp lighting positions 8 and 7 have a fixation lamp projection angle close to 12 °. Here, the fixation lamp lighting position 7 is set.
Although the setting of the y position of the fixation lamp has been described above, the setting of the fixation lamp at the x position can be similarly performed.
In step S630, the scanning position setting unit 142 of the control unit 140 sets the scanning position so that the measurement light scans the position of the instructed part.
The position of the macular 406 of the retina is determined by lighting the fixation lamp lighting position set in step S620.
Using the fixation lamp lighting position information Fpa and the angular distance Rpa from the macula, the measurement light projection angle 408 can be calculated using Equation 3 in step S260.
In this embodiment, as can be seen from FIG. 5, since the angular distance Rpa = 12 ° and Fpa = 10 ° from the retinal measurement position, Ba = 2 °.
Here, since the tomographic image acquisition apparatus performs the main traveling of the measurement light at the position of the measurement light projection angle in the Y direction, the sub-scanning scanning position is the same as the measurement light projection angle.
Further, the fixation lamp lighting position information determined in step S620 and the scanning position (measurement light projection angle) determined in step S630 are transferred to the tomographic image acquisition unit 110 and the storage unit 130.
According to the configuration described above, it is possible to easily set the lighting position of the fixation lamp and the scanning position by designating a specific position of the retina of the object to be measured using the tomographic imaging apparatus.
In each embodiment, the operator instructs the photographing position of the retina (eye part), and sets the fixation lamp lighting position and the scanning position based on the photographing position instruction. In the present embodiment, even if the operator continuously changes the scanning position of the tomographic image during tomographic imaging, the imaging position that is constantly scanned corresponds to the vicinity of the optical axis of the tomographic image acquisition unit. The lighting position of the fixation lamp is controlled, and further, the scanning position is controlled so that the measurement light of the optical coherence tomography scans the imaging position of the retina.
In step S710, the control unit 140 determines an initial fixation lamp lighting position and an initial scanning position. Here, as in the first embodiment, the fixation lamp lighting position and the scanning position are determined based on the instruction to the photographing position from the operator, and thus description thereof is omitted. Alternatively, a predetermined fixed fixation lamp lighting position and scanning position may be determined in advance.
The initial fixation lamp lighting position and scanning position set in step S 710 are transferred to the tomographic image acquisition unit 110 and the storage unit 130.
In step S720, the instruction acquisition unit 120 acquires an instruction to change the scanning position of the operator. This instruction is input by an operator via an input device such as a mouse or a joystick (not shown) provided in the tomographic imaging apparatus 10. The obtained instruction is transmitted to the control unit 140.
In step S730, the control unit 140 determines whether the conditions for readjustment of the fixation lamp lighting position and the scanning position are satisfied based on the operator's scanning position change instruction obtained in step S720.
First, based on the change of the scanning position of the operator in step S720, the changed scanning position is calculated. The changed scanning position is referred to as a temporary scanning position. In FIG. 4A, changing the scanning position changes the measurement light projection angle 408. The measurement light projection angle 408 increases or decreases according to an instruction from the operator. The measurement light projection angle 408 with respect to the temporary scanning position is represented by Ba ′.
The condition for readjustment of the fixation lamp lighting position and the scanning position is that the retina imaging position can be made closer to the optical axis of the tomographic imaging section by changing the scanning position or the measurement projection angle Ba. Whether there is a lighting position.
First, the fixation disparity angle 407 from the macula after changing the scanning position is set as Rpa ′, and calculation is performed using the following formula 4.
Rpa ′ = Fpa−Ba ′ (Formula 4)
Where Fpa is a fixation lamp projection angle.
Next, a fixation lamp projection angle close to Rpa 'is selected from the fixation lamp projection angle table, and a fixation lamp lighting position of the fixation lamp projection angle is selected. If the selected fixation lamp lighting position is different from the fixation lamp lighting position stored in the storage unit 130, the condition of step S730 is satisfied, and the process proceeds to step S740. Conversely, if the selected fixation lamp lighting position is the same as the fixation lamp lighting position stored in the storage unit 130, the process proceeds to step S750.
In step S740, the control unit 140 resets the scanning position and the fixation lamp lighting position using the fixation lamp position information after changing the scanning position and the measurement light projection angle Ba ′. First, when the fixation lamp position information is changed, the measurement light projection angle Ba is calculated again using Equation 3 in step S260. However, Rpa in Expression 3 is Rpa ′, and Fpa is the projection angle of the fixation light position after the change determined in step S730.
The fixation lamp lighting position information determined in step S730 and the scanning position (measurement light projection angle) determined in step S740 are transferred to the tomographic image acquisition unit 110 and the storage unit 130.
In step S750, the control unit 140 sets the scanning position in accordance with an instruction from the operator without changing the fixation lamp position in step S720, and transfers the scanning position to the tomographic image acquisition unit 110.
In step S760, the instruction acquisition unit 120 determines whether a new instruction from the operator has been acquired. If there is a new instruction, the process returns to step S720. If the instruction from the operator is finished, the process is finished.
In step S730, the condition has been described so that the photographing position comes to the optical axis of the photographing apparatus. However, other conditions, for example, a change distance of the fixation lamp lighting position after the change, or a condition such that the optical axis is between the shooting position and the target position may be set.
According to the configuration described above, the fixation lamp lighting position and the scanning position can be easily changed only by the operator continuously changing the scanning position.
The present invention is not limited to the above-described form, and can be realized in various forms. That is, the tomographic imaging apparatus shown in FIG. 1 can be realized by hardware or a combination of hardware and software. In this case, each unit other than the tomographic imaging apparatus 10 in FIG. 1 corresponds to a circuit or ASIC that realizes a specific function if hardware, or a module if software. When all are realized by software, it can be a module that operates on a general-purpose PC.
DESCRIPTION OF SYMBOLS 10 Tomographic imaging device 110 Tomographic image acquisition part 120 Instruction acquisition part 130 Storage part 140 Control part 141 Fixation lamp setting part 150 Scanning position setting part
According to the instructed position and the first lighting position, a second lighting position of the fixation lamp, and an angle at which the measurement light is applied to the anterior eye portion of the eye to be examined through the scanning unit, A determination means for determining
First determining means for determining the second lighting position according to the instructed position and the first lighting position;
Second determining means for determining an angle at which the measurement light is applied to the anterior segment of the eye to be examined via the scanning means according to the instructed position and the determined second lighting position; The imaging apparatus according to claim 1, further comprising:
Second determining means for determining an angle at which the measurement light is applied to the anterior segment of the eye to be examined via the scanning means according to the instructed position and the determined second lighting position; An imaging apparatus comprising:
The second determining means corresponds to an interval between adjacent lighting positions among lighting positions where the fixation lamp can be lit, according to the instructed position and the determined second lighting position. The imaging apparatus according to claim 2 or 3, wherein an angle at which the measurement light is applied to the anterior eye portion of the eye to be examined is determined through an angle in a range narrower than the angle.
5. The imaging apparatus according to claim 1, wherein the angle is an angle with respect to an optical axis of an optical system that irradiates the eye to be examined with the measurement light via the scanning unit.
6. The apparatus according to claim 1, further comprising a control unit that controls the fixation lamp in accordance with the determined second lighting position and controls the scanning unit in accordance with the determined angle. The imaging device according to any one of the above.
The said control means controls the said fixation lamp so that the lighting position of the said fixation lamp may be changed from the said 1st lighting position to the said 2nd lighting position. Imaging device.
Instruction acquisition means for acquiring an instruction for a position of a part of the fundus image of the eye to be examined at a predetermined lighting position of the fixation lamp;
Control means for controlling the fixation lamp and the scanning means according to the instructed position and the predetermined lighting position;
The tomographic image of the fundus based on the combined light of the return light from the subject eye irradiated with the measurement light via the scanning means controlled by the control means and the reference light corresponding to the measurement light The imaging apparatus according to claim 6, further comprising tomographic image acquisition means for acquiring an image.
Further comprising display control means for displaying a fundus image of the eye to be examined on a display means;
The said instruction | indication acquisition means acquires the said instruction | indication by selecting the position of a part of fundus image displayed on the said display means, The one of Claim 1 thru | or 9 characterized by the above-mentioned. Imaging device.
Instruction acquisition means for acquiring an instruction for a position of a part of the fundus of the eye to be examined;
A determining means for determining a lighting position of the fixation lamp and a scanning position of the scanning means in a range narrower than an interval between the lighting positions of the fixation lamp according to the instructed position;
The determining means has a range narrower than an angle corresponding to an interval between adjacent lighting positions among the lighting positions of the fixation lamp and the lighting positions where the fixation lamp can be lit according to the instructed position. The imaging apparatus according to claim 11, wherein an angle at which the measurement light is applied to the anterior segment of the eye to be examined is determined as the scanning position.
The determining means determines a lighting position of the fixation lamp and a scanning position of the scanning means within a range narrower than an interval between the fixation positions of the fixation lamp according to the instructed position and the macular fundus. The imaging apparatus according to claim 11, wherein the imaging apparatus is determined.
Change instruction acquisition means for acquiring an instruction to change the scanning position of the scanning means;
Determination means for determining whether or not an interval between the determined scanning position and the scanning position according to the change instruction is narrower than an interval between lighting positions of the fixation lamp;
The imaging apparatus according to claim 11, further comprising:
The imaging apparatus according to claim 14, wherein when it is determined that the determination unit is not narrow, the determination unit again determines a lighting position of the fixation lamp and a scanning angle of the scanning unit.
Second determining means for determining an angle at which the measurement light is irradiated to the anterior eye portion of the eye to be examined via a scanning means according to the instructed position and the determined second lighting position;
The second determining means corresponds to an interval between adjacent lighting positions among lighting positions where the fixation lamp can be lit, according to the instructed position and the determined second lighting position. 17. The control apparatus according to claim 16, wherein an angle at which the measurement light is applied to the anterior eye portion of the eye to be examined is determined through an angle in a range narrower than the angle.
First determination means for determining a lighting position of the fixation lamp in response to an instruction for a position of a part of the fundus of the eye to be examined;
A second determining unit that determines a scanning position of a scanning unit that scans the measurement light on the fundus within a range narrower than the interval between the lighting positions of the fixation lamps;
19. The apparatus according to claim 16, further comprising a control unit that controls the fixation lamp in accordance with the determined lighting position and controls the scanning unit in accordance with the determined angle. The control device according to item.
A computer program for causing a computer to function as the control device according to any one of claims 16 to 19.
The control device determining an angle of irradiating measurement light to the anterior segment of the eye to be examined via a scanning unit according to the instructed position and the determined second lighting position;
In the step of determining the second lighting position, the control device is adjacent to a lighting position where the fixation lamp can be lit according to the instructed position and the determined second lighting position. The angle at which the measurement light is applied to the anterior eye portion of the eye to be examined is determined through the scanning unit within an angle narrower than an angle corresponding to the interval between the matching lighting positions. The control method described.
The control device determining a lighting position of the fixation lamp in response to an instruction for a position of a part of the fundus of the eye to be examined; and
The controller determines a scanning position of scanning means for scanning the measurement light on the fundus within a range narrower than the interval between the fixation lamp lighting positions;
The control device further includes a step of controlling the fixation lamp in accordance with the determined lighting position and controlling the scanning unit in accordance with the determined angle. The control method according to any one of the above.
In accordance with the instructed position and the first lighting position , the imaging device sends the measurement light to the anterior eye part of the eye to be examined via the second lighting position of the fixation lamp and the scanning unit. Determining the angle at which the light is irradiated;
In the determining step, the imaging device determines the second lighting position according to the designated position and the first lighting position, and the designated position and the determined second 26. The method of controlling an imaging apparatus according to claim 25, wherein an angle at which the measurement light is applied to the anterior eye portion of the eye to be examined is determined through the scanning unit in accordance with a lighting position of the imaging device.
A step of determining an angle at which the imaging device irradiates the anterior eye part of the eye to be examined via the scanning unit according to the instructed position and the determined second lighting position; When,
In the step of determining the second lighting position, the imaging device is adjacent to a lighting position where the fixation lamp can be lit according to the instructed position and the determined second lighting position. 27. The angle at which the measurement light is applied to the anterior eye portion of the eye to be examined through the scanning unit is determined in an angle narrower than an angle corresponding to the interval between the matching lighting positions. 27. A method for controlling the imaging apparatus according to 27.
The imaging apparatus further includes a step of controlling the fixation lamp in accordance with the determined second lighting position and controlling the scanning unit in accordance with the determined angle. 29. A method for controlling an imaging apparatus according to any one of 25 to 28.
The imaging device obtaining an instruction for a position of a part of the fundus image of the eye to be examined at a predetermined lighting position of the fixation lamp;
The imaging device controlling the fixation lamp and the scanning unit according to the instructed position and the predetermined lighting position;
The imaging device obtaining an instruction for the position of a part of the fundus of the eye;
The imaging device determining a lighting position of the fixation lamp and a scanning position of the scanning means in a range narrower than an interval between the lighting positions of the fixation lamp according to the instructed position;
32. A computer program for causing a computer to execute each step of the control method for an imaging apparatus according to claim 25.
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JP6619202B2 (en) * 2015-10-29 2019-12-11 株式会社トプコン Ophthalmic imaging equipment
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