Ophthalmologic imaging device

Abstract

To provide an ophthalmologic imaging device that facilitates imaging without missing any imaging method required for follow-up checks.SOLUTION: An ophthalmologic imaging device can captures ophthalmologic images of a subject's eye by a plurality of imaging methods including a first imaging method. The device includes: a receiving means for receiving an input of ID set for each subject; and a control means which, upon receiving an input of the ID, references imaging history information that indicates an imaging method used in a past imaging and the imaging date and time thereof per subject, and when no follow-up imaging in the first imaging method has not been conducted for a predefined period of time, selects a follow-up imaging in the first imaging method or outputs information for promoting selection of the follow-up imaging in the first imaging method.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to ophthalmic imaging apparatus. [Background technology]

[0002] For example, for eye diseases such as glaucoma that require long-term management, follow-up observation may be performed by taking ophthalmologic images of the same part of the subject on different examination days. For example, fundus OCT (Optical Coherence Tomography) can obtain tomographic images of the fundus multiple times, and the progress of the diseased area can be observed from changes in the tomographic images (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-013341 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, ophthalmic imaging devices have become increasingly multifunctional, and one device may be used to capture images using a variety of imaging methods. This makes it difficult for examiners to understand the imaging methods required for follow-up observation, and there is a risk that images may be missed.

[0005] In view of the above-described conventional techniques, the present disclosure has as its technical object to provide an ophthalmologic imaging device that can easily capture images in all imaging methods required for follow-up observation. [Means for solving the problem]

[0006] An ophthalmic imaging device according to a first aspect of the present disclosure is an ophthalmic imaging device capable of capturing ophthalmic images of a subject's eye using a plurality of imaging methods including a first imaging method, and includes: a receiving means for receiving input of an ID set for each subject; and a control means for, when receiving input of the ID, referring to imaging history information indicating, for each subject, the imaging method used in past imaging and the imaging date and time, and selecting follow-up imaging using the first imaging method if follow-up imaging using the first imaging method has not been performed within a predetermined period, or outputting information prompting the selection of follow-up imaging using the first imaging method. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing an apparatus configuration in an embodiment. [Diagram 2] FIG. 11 is a diagram showing imaging history information in the embodiment. [Diagram 3] 4 is a flowchart showing the operation of the device in the embodiment. [Figure 4] FIG. 13 is a diagram showing an observation screen in an embodiment. [Diagram 5] 13 is an example of a pull-down list in an examination selection section in the embodiment. [Figure 6] FIG. 13 is a diagram showing a confirmation screen in the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] <Summary> An embodiment of an ophthalmologic imaging apparatus according to the present disclosure will be described. The items grouped in <> below can be used independently or in conjunction with each other.

[0009] The ophthalmologic imaging apparatus of the present embodiment captures ophthalmologic images of the subject's eye using a plurality of imaging methods. The plurality of imaging methods differ in at least one of the types of images captured and the parts of the body captured. In the following description, unless otherwise specified, the plurality of imaging methods will be described assuming that at least a first imaging method and a second imaging method are included.

[0010] The ophthalmic imaging apparatus according to this embodiment includes at least a reception unit and a control unit. Note that the control unit may also serve as the reception unit. The reception unit receives the input of an ID set for each subject. When the control unit receives the input of the ID, it refers to the imaging history information indicating the imaging method and imaging date and time used in past imaging for each subject, and if the follow-up imaging by the first imaging method has not been performed within a predetermined period, it selects the follow-up imaging by the first imaging method or outputs a notification prompting the selection of the follow-up imaging by the first imaging method. As a result, the follow-up imaging by the first imaging method is likely to be performed at an appropriate time. Note that the above period may be appropriately changed by the user.

[0011] In addition, the plurality of imaging methods includes a second imaging method different from the first imaging method. The analysis parameters used when analyzing the ophthalmic image obtained by the second imaging method are acquired based on the first ophthalmic image obtained by the first imaging method. In this embodiment, as described above, for the first imaging method, the follow-up imaging is likely to be performed at an appropriate time. Therefore, when analyzing the ophthalmic image obtained by the second imaging method, appropriate analysis parameters are likely to be used, and appropriate analysis results are likely to be obtained.

[0012] <OCT device> The ophthalmic imaging device may be, for example, an OCT device. The OCT device has an OCT optical system that irradiates the test eye with measurement light and detects a spectral interference signal between the return light of the measurement light and the reference light. The control unit generates an OCT image based on the spectral interference signal. The OCT device captures an OCT image of the test eye by a plurality of scan patterns. For example, various scan patterns are known, such as line, cross, multi, map, radial, circle, etc. In this case, at least imaging with different scan patterns can be said to be imaging methods that are different. Furthermore, even if the scan pattern is the same, imaging with different scanning positions (position and rotation angle) can be said to be imaging methods that are different. The OCT device may be capable of acquiring not only intensity OCT images but also motion contrast images. The OCT device may be a combined device with a fundus front image imaging device.

[0013] For example, in the OCT device, axial length data may be obtained based on capturing an OCT image. Various methods are applicable as a method for measuring axial length data. For example, axial length data of the subject's eye may be measured based on an optical path length adjustment of the OCT optical system. The optical path length adjustment of the OCT optical system is performed while the device (OCT optical system) is maintained at a constant working distance from the subject's eye, and the axial length data can be measured based on the position of the optical member for adjusting the optical path length after the adjustment. In this case, the optical path length difference between the measurement light and the reference light is adjusted so that OCT data of the fundus is obtained. The OCT optical system may have an optical path length adjustment unit. The optical path length adjustment unit changes the optical path length of at least one of the measurement light and the reference light. The optical path length adjustment unit may have an optical member that is driven on at least one of the optical paths of the measurement light and the reference light to change the optical path length difference between the measurement light and the reference light. Furthermore, for example, in the case of an apparatus capable of acquiring OCT data of the anterior segment and OCT data of the fundus with at least one of the working distance and the optical path length difference being different from each other, the axial length data of the test eye may be measured based on the OCT data of the anterior segment and the OCT data of the fundus, and at least one of the working distance and the optical path length difference when each of the data was acquired.

[0014] The axial length data can be widely used as an analytical parameter, for example, when analytically determining the distance (transverse distance), area, volume, and density of fundus tissue.

[0015] Also, for example, fundus layer thickness analysis may be performed. In this case, analysis processing may be performed using a database in which fundus layer thickness information on a plurality of eyes is stored, and the analysis processing may be performed using a plurality of databases in which axial length data of a plurality of eyes that constitute a population of the database are different from each other. Each database may be used according to the axial length data of the subject eye. For example, an analysis processing based on a database for the subject eye corresponding to the first axial length and an analysis processing based on a database for the subject eye corresponding to the second axial length may be executed by the analysis device. Also, the axial length data may be used to correct the display magnification of the OCT data of the fundus of the subject eye and the size of the analysis range. Also, in the progress management of diseases in which the elongation of the axial length is a problem, such as so-called pathological myopia, the progress observation of the axial length is useful.

[0016] In addition, in this embodiment, the first imaging method may be to capture an OCT image for acquiring axial length data, and the second imaging method may be to capture an OCT image for analysis using the axial length data as one of the analysis parameters. If the axial length data cannot be obtained from the second imaging method itself, follow-up may be performed using the second imaging method, but the OCT image for acquiring the axial length data may not be captured. This is because the change in axial length progresses more slowly over time than the layer thickness change due to disease, so there is no need to capture every time. According to this embodiment, if the OCT image for acquiring the axial length data has not been captured for a predetermined period of time, the user is prompted to capture the image, and as a result, it becomes easier to obtain appropriate analysis results.

[0017] In addition to or instead of referring to the imaging history information, the control unit may refer to event history information for each subject, and when a certain period of time has passed since the event, control may be performed by the control unit to prompt imaging using an imaging method previously associated with the event. Events include, for example, surgery, medication, hospital visit, etc., and the event history information may store the type of event and the date and time of the event for at least each subject. The type of event and the imaging method may be previously associated with each other, for example, by a table or the like. This allows appropriate imaging to be performed using an imaging method corresponding to the event when the OCT device is used on the subject at a timing when an appropriate time has passed or arrived since the event.

[0018] The present disclosure is not limited to the device described in the present embodiment. For example, the terminal control software (program) that performs the functions of the above embodiment can be supplied to a system or device via a network or various storage media, and the control device (e.g., CPU, etc.) of the system or device can read and execute the program.

[0019] <Example> An OCT apparatus 1 will be described below as an embodiment of an ophthalmic imaging apparatus.

[0020] For convenience, the following description will be given assuming that the horizontal direction is the X direction, the vertical direction is the Y direction, and the depth direction is the Z direction.

[0021] 1 and 2, an OCT device 1 according to the embodiment includes an imaging unit 2, a control unit 70, a monitor 80, and an operation unit 85. Each unit is electrically connected via a bus or the like.

[0022] <Photography Unit> The imaging unit 2 has the main optical system in the OCT apparatus 1. In the present embodiment, the imaging unit 2 has an OCT optical system (interference optical system) 10, a light guiding optical system 10a, a fundus observation optical system (SLO optical system) 30, and an anterior eye segment observation optical system 40 (anterior eye segment observation optical system). The optical paths of the OCT optical system 10, the fundus observation optical system 30, and the anterior eye segment observation optical system 40 are branched / combined by beam splitters / combiners 16, 17.

[0023] <OCT optical system> The OCT optical system 10 detects the spectral interference signal between the measurement light and the reference light irradiated on the fundus of the eye to be examined E. The OCT optical system 10 may be, for example, SD-OCT, SS-OCT, or OCT based on other imaging principles.

[0024] The OCT optical system 10 has at least an OCT light source 11, an optical splitter 12, a reference optical system 20, and a detector 25. Note that the reference optical system 20 in the present embodiment will be described as a reflective optical system, but it may also be a transmissive optical system.

[0025] The OCT light source 11 emits low-coherence light. The light emitted from the OCT light source 11 is split by the optical splitter 12 into measurement light and reference light. In the present embodiment, a coupler (splitter) is used as the optical splitter 12. The measurement light is guided to the eye to be examined E through the light guiding optical system 10a, and the reference light is guided to the reference optical system 20. In FIG. 1, a polarizer 13 is disposed on the reference optical path. The reference light is reflected by a mirror (not shown) disposed on the reference optical path and is incident on the detector 25 in a state of being combined with the return light of the measurement light by the optical splitter 12. Thereby, the spectral interference signal between the return light and the reference light is detected. For example, in SD-OCT, a spectrometer is used as the detector 25.

[0026] In this embodiment, a mirror (not shown) disposed in the reference optical system 20 is movable along the optical axis, and the optical path length difference between the measurement light and the reference light is adjusted according to the position of the mirror. In addition, the polarization of the measurement light and the reference light is adjusted by the polarizer 13.

[0027] Additionally, a focusing lens 14, a scanning unit (optical scanner) 15, and an objective lens 60 are arranged on the optical path between the light splitter 12 and the subject's eye E. The optical system between the light splitter 12 and the subject's eye E, including the focusing lens 14, the scanning unit (optical scanner) 15, and the objective lens 60, forms a light-guiding optical system 10a in this embodiment.

[0028] In this embodiment, the focus position in the OCT optical system 10 is changed by displacing the focusing lens 14 in the optical axis direction.

[0029] The scanning unit 15 is used to change the acquisition position of the OCT image. The scanning unit 15 may be used to two-dimensionally scan the fundus of the subject's eye E with the measurement light. The scanning unit 15 may include, for example, two optical scanners having different scanning directions. Each optical scanner may be a galvanometer mirror or another optical scanner.

[0030] The objective lens 60 guides the measurement light to the fundus of the subject's eye. The measurement light is rotated via the objective lens 60 with a position conjugate with the scanning unit 15 as the rotation point. As shown in FIG. 1, when the anterior segment of the subject's eye is located at the rotation point, the measurement light reaches the fundus without being vignetted by the iris, and the measurement light scans the fundus based on the driving of the scanning unit 15. In this case, the focusing surface of the measurement light is formed on the fundus.

[0031] <Fundus observation optical system> The fundus observation optical system 30 is used to obtain a front image of the fundus as an observation image. Through the fundus observation optical system 30, a front image of the fundus is obtained as an observation image.

[0032] 1, an SLO optical system is shown as an example of the fundus observation optical system 30. The fundus observation optical system 30 may have at least an irradiation optical system and a light receiving optical system. The irradiation optical system irradiates an imaging site of the subject's eye with observation light. The light receiving optical system receives fundus reflection light due to the observation light by a light receiving element 39. Observation images are sequentially acquired based on an output signal from the light receiving element 30.

[0033] The fundus observation optical system 30 further includes a focus adjustment unit, which includes a focusing lens .

[0034] For example, a laser diode light source is used as the observation light source 31. In addition to the focusing lens 34, a scanning unit 35 and an objective lens 60 are arranged in the observation light path. The scanning unit 35 two-dimensionally scans the imaging site of the subject's eye with light. The scanning unit 35 may include, for example, a combination of a polygon mirror and a galvano scanner.

[0035] A beam splitter 33 is disposed between the observation light source 31 and the focusing lens 34. A confocal aperture 37 and a light receiving element 39 are disposed in the transmission direction of the beam splitter 33.

[0036] The observation light is reflected by the beam splitter 33 and then passes through a focusing lens 34 to reach a scanning unit 35. The light passing through the scanning unit 35 passes through a beam splitter 17 and then passes through an objective lens 60 to be irradiated onto the fundus of the subject's eye.

[0037] The reflected light from the fundus is guided back along the light projection path to the beam splitter 33. The reflected light from the fundus passes through the beam splitter 33 and is received by the light receiving element 39 via the confocal aperture 37. Based on a light receiving signal from the light receiving element 39, a front image of the fundus is formed. The formed front image may be stored in the memory 72.

[0038] <Anterior segment observation optical system> The anterior-segment observation optical system 40 is used to observe a front image (referred to as an observation image) of the anterior segment of the subject's eye E. The anterior-segment observation optical system 40 has at least an image sensor 45. In this embodiment, an image of the anterior segment is formed on the image sensor 45. The observation image of the anterior segment acquired via the anterior-segment observation optical system 40 is used for alignment and tracking control of the photographing unit 2 for the subject's eye E when photographing the fundus.

[0039] <Fixation projection optical system> The OCT device 1 further includes a fixation target projection optical system. The fixation target projection optical system may be an internal fixation lamp. The fixation target projection optical system guides the gaze direction of the subject's eye E by projecting a fixation target (fixation light beam) onto the subject's eye E. In this embodiment, the fixation target projection optical system can change the presentation position of the fixation target two-dimensionally and can guide the subject's eye E in a plurality of directions. As a result, the imaging site is changed. In this embodiment, the fixation projection optical system is shared by the fundus observation optical system 30, which is an SLO optical system. A visible light source different from the observation light source is provided, and the timing of projecting the visible light is controlled, so that the fixation target is projected onto the subject's eye E.

[0040] <Drive unit> The driving unit 5 moves the photographing unit 3 in each of the X, Y and Z directions relative to the subject's eye E. The driving unit 5 has an actuator for moving the photographing unit 2 in each direction, and is driven based on a control signal from the control unit 70.

[0041] <Facial support unit> The face support unit 7 supports the face of the subject so that the subject's eye E faces the photographing unit 2. The face support unit 7 may include, for example, a chin rest 7a. The subject's face is placed on the chin rest 7a. In this embodiment, the face support unit 7 has an actuator that moves the position of the chin rest 7a in the vertical direction. The chin rest 7a may also have a sensor that detects that the subject's face is placed on it.

[0042] <Control system> Next, the control system of the OCT device 1 will be described.

[0043] The control unit 70 of the OCT device 1 controls various operations in the OCT device 1. In this embodiment, various image processing operations are performed by the control unit 70. That is, the control unit 70 also functions as an image processor. The control unit 70 may be configured with, for example, a CPU, a GPU, a RAM, a ROM, etc.

[0044] In this embodiment, the control unit 70 is connected to a monitor 80 and controls the display of the monitor 80. Furthermore, the control unit 70 is connected to a storage device 72, an operation unit 85, and the like.

[0045] The storage device 72 is a non-transitory storage medium, and may be, for example, any of a hard disk, a flash memory, and an EEPROM, as appropriate. For example, a control program that defines the imaging operation may be stored in the storage device 72. The control unit 70 may store various images captured by the OCT device 1 in the storage device 72.

[0046] Further, the storage device 72 stores an imaging history database. An overview of the imaging history database is shown with reference to FIG. 2. As shown in FIG. 2, the imaging history database stores imaging history information of a plurality of subjects who have been examined in the past. The imaging history information includes at least the imaging pattern (imaging method in the embodiment) and imaging date and time used in the past imaging. In the imaging history information, the imaging pattern and the imaging date and time are associated with the ID of the subject. The ID here is information for identifying the subject, and for example, either a name or a code can be used as the ID.

[0047] In this embodiment, the image type and the photographed part are specified by the photographing pattern included in the photographing history information. As shown in Fig. 2, in the case of photographing by OCT, at least the scan pattern and the fixation target position are included in the photographing history information.

[0048] The operation unit 85 of this embodiment may be any one of various input interfaces such as a keyboard, a mouse, a touch panel, etc. In the case of a touch panel, the monitor 80 also serves as the operation unit 85. The control unit 70 accepts operation input by the examiner via the operation unit 85.

[0049] <Operation description> Next, a description will be given of the imaging operation in the OCT device 1. Fig. 3 is a flowchart showing the flow of the imaging operation.

[0050] First, the control unit 70 accepts input of the subject's ID (S1). For example, the ID is input by reading a barcode on which the subject's ID is written with a barcode reader connected to the device, or by directly inputting the ID via a keyboard. When imaging a subject whose ID has already been registered, the ID is input by displaying a list of subjects and selecting the corresponding one from the list.

[0051] In this embodiment, after the ID is input, the display of the observation screen 100 (see FIG. 4) starts (S2). In this embodiment, while the observation screen 100 is displayed, operations related to the selection of an imaging pattern, the adjustment of imaging conditions, and the start of imaging are input.

[0052] <Selecting the shooting pattern> In this embodiment, the imaging pattern is selected using the examination selection unit 210 (S3). The examination selection unit 210 is a type of UI element for selecting an imaging pattern in the OCT device 1. In this embodiment, a plurality of titles (subjects) corresponding to uses, disease types, etc. are prepared, and one or a plurality of imaging patterns are associated in advance with each title.

[0053] One or more shooting patterns associated with a title are selected by selecting any one of the titles via the examination selection unit 210. For example, a plurality of titles are displayed in a pull-down manner, and an operation to select any one of the displayed plurality of titles is accepted.

[0054] The imaging patterns corresponding to each title are shown in the following table. In this embodiment, the names of the imaging patterns in OCT are a combination of the imaging site and the scan pattern. However, the retinal map is a pattern in which the macula and the optic disc are map scanned together. When a specific imaging pattern is selected, axial length data is measured. For ease of explanation, in this embodiment, in the case of the macular line, measurement of axial length data is performed together with imaging. However, the imaging pattern in imaging performed together with axial length data measurement may be any scan pattern other than the macular line.

[0055] [Table 1]

[0056] FIG. 5 shows an example of a pull-down list displayed in the test selection unit 210. As shown in FIG. As shown in FIG. 5, the pull-down list has the above-mentioned multiple titles arranged side by side. In this embodiment, as shown in FIG. 5, an alert mark 210a is displayed near a title for which a predetermined period or more has passed since the most recent (previous) shooting. In this embodiment, the alert mark 210a may be displayed in a different manner depending on the period from the most recent (previous) shooting. For example, the alert mark 210a may be displayed in yellow for a title for which three months or more have passed since the most recent shooting, and in red for a title for which three months or more have passed since the most recent shooting. In this embodiment, the alert mark 210a is a colored frame surrounding the title. However, this is not necessarily limited to this, and various displays may be used to indicate to the examiner a title for which a predetermined period or more has passed since the most recent shooting. The control unit 70 refers to the shooting history information of the subject specified by the ID, and determines the shooting pattern for which a predetermined period or more has passed since the most recent shooting based on the shooting history information. If there is a shooting pattern for which a predetermined period or more has passed since the most recent shooting as a result of the determination, the alert mark 210a is displayed for the title corresponding to that shooting pattern.

[0057] In this embodiment, if there is no shooting for a uniform period of time for any title, the alert mark 210a is displayed, but this is not necessarily limited to this, and the length of the period may differ for each title or shooting pattern.

[0058] When the imaging pattern used in the past imaging of the subject is stored in advance, the combination may be automatically set based on the information. In addition, when the follow-up imaging is selectable in the examination selection unit 210 and the follow-up imaging is selected, the imaging pattern used in the past may be set.

[0059] By selecting a shooting pattern via the examination selection unit 210, the shooting pattern corresponding to the title selected via the examination selection unit 210 is listed in the list 221 on the observation screen 100. In addition, in the list 221, text indicating the setting for each shooting pattern is displayed. For example, the target eye (either left or right), the shooting part, and the scan pattern are displayed. Shooting is performed sequentially according to the shooting patterns displayed in the list 221. Usually, shooting is performed while changing the shooting pattern in order from the top to the bottom of the list 221. When a shooting pattern for the next shooting (to be executed when the Capture button 227 is next operated) is selected, the text corresponding to the selected shooting pattern is highlighted on the list 221. Furthermore, in this embodiment, the shooting unit 2 is moved in the left-right direction so that the target eye in the selected shooting pattern is shot. By selecting an area corresponding to the desired shooting pattern on the list 221 based on the operation, the examiner can arbitrarily change the shooting pattern to be used in the next shooting.

[0060] A fundus observation image 120 is displayed on the observation screen 100. A graphic (hereinafter, referred to as a scan line SL) indicating a scan position (scan line) in the next shooting is superimposed on the fundus observation image 120.

[0061] <Alignment and adjustment of detection conditions> After the photographing pattern is selected, alignment and adjustment of the detection conditions are performed (S4). For example, in this embodiment, an alignment method selection button 241 is arranged on the observation screen 100. The alignment method selection button 241 is operated to select either automatic alignment or manual alignment. Depending on the operation, the automatic alignment function is switched on / off. In this embodiment, the automatic alignment function is enabled by default. By automatic or manual alignment, the photographing unit 2 and the subject's eye E are adjusted based on the anterior eye observation image so that they have a predetermined positional relationship. A detection condition controller 222 is arranged on the observation screen 100. The detection condition controller 222 is operated to adjust the detection conditions of the subject's eye E by the OCT optical system 10. The detection conditions are any of various conditions related to the detection ability of eye tissue, and specifically, optical path length difference (hereinafter, OPL), focus, detection sensitivity, polarization state, etc. are included. An Auto Optimize button, a focus controller, an OPL controller, a sensitivity setting button, and the like may be arranged as the detection condition controller 222. The result of the adjustment is reflected in the OCT observation image 130 as needed.

[0062] When follow-up imaging is performed, the alignment and detection conditions are reproduced from the values ​​of the previous imaging. Therefore, the OCT device 1 of this embodiment stores the adjustment results related to the alignment and detection conditions in advance in the storage unit 72 when the imaging result is obtained. These pieces of information may be part of the imaging history information.

[0063] <photograph> After the alignment and the adjustment of the detection conditions are completed, the capture button 227 is operated to start capturing images (S5). The measurement light is scanned based on the selected capturing pattern, and OCT data is captured.

[0064] <About measuring axial length data> Incidentally, when the macular line is selected and axial length data is measured, the Capture button 227 serves as a common trigger. In this case, various information for obtaining axial length data of the subject's eye is acquired immediately before the scan for photographing. In detail, an interference signal based on the scan for measuring axial length data, OPL, and position information of the photographing unit 2 in the Z direction relative to the subject's eye E are acquired.

[0065] The axial length data of the subject's eye E is obtained based on at least the adjusted OPL. In order to measure more accurate axial length data, not only the OPL but also the interference signal at the OPL and the Z-direction position of the photographing unit 2 relative to the subject's eye E are used. That is, the optical path length difference corresponding to the fundus position can be accurately obtained from the OPL and the interference signal at the OPL. In addition, in obtaining the axial length data, the influence of the Z-direction alignment deviation with respect to the position of a predetermined working distance is corrected. The axial length AL of the subject's eye E is expressed by the following formula (1) when the axial length of a known model eye is AL0.

[0066] AL = AL0 + Δp + Δd + Δz (1) Here, Δp, Δd, and Δz are the differences between the various pieces of information acquired to obtain the axial length of the subject's eye and a reference value based on a known model eye. The reference value may be, for example, the various pieces of information acquired in advance when measuring the axial length of the model eye. That is, Δp may be the difference between the measurement value and the reference value for the adjusted OPL, Δd may be the difference between the measurement value and the reference value for the appearance position of the fundus image based on the interference signal, and Δz may be the difference between the measurement value and the reference value for the position of the photographing unit 2 in the Z direction relative to the subject's eye E.

[0067] After the measurement operation of the axial length data is completed, a scan for imaging is performed. For example, in this embodiment, additive imaging is performed. That is, multiple scans are performed on the same scan line, and multiple B-scan images are captured. In this embodiment, the interference signal obtained in the scan for imaging is not used for measuring the axial length data, and a separate scan is performed for measuring the axial length data.

[0068] <Display confirmation screen> When the shooting is completed, the screen transitions to a confirmation screen 500 shown in FIG. 7. The captured OCT data is displayed on the confirmation screen 500. Also, a Retry button 230 and a Save button 231 are arranged. The Retry button is operated to perform reshooting. In this embodiment, when the Retry button 230 is operated, the captured OCT data is discarded and the screen transitions to the observation screen 100. In this case, the same shooting pattern as that of the most recent shooting is selected in the list 221.

[0069] The Save button is operated to save the shooting results. When the Save button 231 is operated, the screen transitions to the screen in FIG. 4. In this case, the next shooting pattern in the list 221 is selected (S6: Yes). In this case, the above operation is repeated for the desired shooting pattern, and then the series of operations ends (S6: No).

[0070] <Modification> While the present disclosure has been described based on the embodiments, the present disclosure is not limited to the above-described embodiments and various modifications are possible.

[0071] For example, in the above embodiment, the alert mark 210a is displayed in the examination selection unit 210 for any title or type of shooting pattern that has a history in the shooting history information as a shooting pattern that was actually performed on the subject and for which a certain period of time has passed since the previous shooting. However, this is not necessarily limited to this, and when there is a history in the shooting history information only for a specific title or shooting pattern, the alert mark 210a may be displayed for the corresponding title in the examination selection unit 210.

[0072] In addition, for example, the alert mark 210a has been described as being displayed when a certain period of time has passed since the previous imaging, but this is not necessarily limited to this, and for example, the alert mark 210a may be displayed when the analysis result has changed beyond a threshold value between multiple examination dates. For example, when the amount of change in the layer thickness analysis result has changed beyond a threshold value, it is possible that the analysis parameters used in the analysis process to obtain the layer thickness analysis result have not been properly obtained. In this case, the alert mark 210a may be displayed for the imaging pattern for obtaining the analysis parameters.

Claims

1. An ophthalmologic imaging apparatus capable of capturing ophthalmologic images of a subject's eye using a plurality of imaging methods including a first imaging method, A receiving means for receiving an input of an ID set for each subject; and a control means for, when receiving input of the ID, referring to shooting history information indicating the shooting method and shooting date and time used in past shooting for each subject, and selecting follow-up shooting using the first shooting method if follow-up shooting using the first shooting method has not been performed within a predetermined period, or outputting information prompting the selection of follow-up shooting using the first shooting method.

2. the plurality of photographing methods includes a second photographing method different from the first photographing method, 2. The ophthalmologic photographing apparatus according to claim 1, wherein an analysis parameter used in analyzing and processing the ophthalmologic image obtained by the second photographing method is acquired based on the first ophthalmologic image obtained by the first photographing method.

3. 3. The ophthalmologic imaging apparatus according to claim 1, wherein the ophthalmologic imaging apparatus is an OCT apparatus that captures OCT images.

4. 4. The ophthalmologic photographing apparatus according to claim 3, wherein in the first photographing method, axial length data of the subject's eye is obtained based on photographing the OCT image.

Images