Ophthalmologic information processing apparatus, ophthalmologic system, ophthalmologic information processing method, and recording medium causing an image of a subject's eye to be displayed

An ophthalmologic information processing apparatus includes an analyzer, a storage unit, a region editing unit, and a display controller. The analyzer is configured to analyze data of a subject's eye optically acquired by projecting light onto the subject's eye, and to specify a lesion region in the subject's eye. The storage unit stores image data of the subject's eye. The region editing unit is configured to specify a changed region by changing the lesion region based on operation information corresponding to an operation content on an operating unit. The display controller is configured to cause an image of the subject's eye to be displayed on a display means based on the image data stored in the storage unit, and to cause a region corresponding to the changed region in the image of the subject's eye to be displayed so as to be identifiable.

FIELD

The disclosure relates to an ophthalmologic information processing apparatus, an ophthalmologic system, an ophthalmologic information processing method, and a program.

BACKGROUND

Age-related macular degeneration (AMD) is one of the causative diseases of visual disturbance. AMD is a disease in which a macular region is impaired directly or indirectly by aging. AMD is classified into exudative age-related macular degeneration (exudative AMD) and atrophic age-related macular degeneration (atrophic AMD). Exudative AMD is a disease in which a retina is damaged by invasion of choroidal neovascularization from the choroid to the lower layer of retinal pigment epithelium layer (hereinafter, RPE) or invasion of choroidal neovascularization between the retina and the RPE. Atrophic AMD is a disease in which the retina is damaged by gradual atrophy of the RPE and vision is gradually decreased.

Photo dynamic therapy (PDT), drug therapy, laser coagulation and the like are known as effective treatments of exudative AMD. On the other hand, effective treatment for atrophic AMD is not well established at present. Therefore, understanding the state of atrophic AMD is extremely important.

In atrophic AMD, so-called geographic atrophy (GA) is found in a predetermined region centered on a fovea. GA is specified from fundus images, fluorescein fluorescence fundus angiograms, fundus autofluorescnece inspection images, or the like, or GA is specified from tomographic images of the retina obtained using optical coherence tomography (for example, U.S. Unexamined Patent Application Publication No. 2015/0201829, Japanese Unexamined Patent Publication No. 2015-136626, Japanese Unexamined Patent Publication No. 2016-107148). The state of atrophic AMD can be understood by observing the specified GA (for example, Japanese Unexamined Patent Application Publication (Translation of PCT Application) No. 2014-505552).

SUMMARY

In order to understand the state of atrophic AMD (age-related macular degeneration), observing morphology (form) (shape, size) or distribution of the region (geographic atrophy region) with geographic atrophy is effective. However, in the conventional techniques, detection accuracy of a lesion region such as an atrophy region is not sufficient. Thereby, in some cases, it was difficult for a doctor or the like to make an accurate diagnosis for a patient.

According to some embodiments of the present invention, a new technique for providing information for doctors or the like to make accurate diagnosis for patients even when the detection accuracy of the lesion region is not sufficient can be provided.

One aspect of some embodiments is an ophthalmologic information processing apparatus, including: an analyzer configured to analyze data of a subject's eye optically acquired by projecting light onto the subject's eye, and to specify a lesion region in the subject's eye; a storage unit storing image data of the subject's eye; a region editing unit configured to specify a changed region by changing the lesion region based on operation information corresponding to an operation content on an operating unit; and a display controller configured to cause an image of the subject's eye to be displayed on a display means based on the image data stored in the storage unit, and to cause a region corresponding to the changed region in the image of the subject's eye to be displayed so as to be identifiable.

Another aspect of some embodiments is an ophthalmologic system, including: a data acquisition unit configured to acquire the data by scanning the subject's eye using optical coherence tomography; the display means; and the ophthalmologic information processing apparatus described above.

Further, another aspect of some embodiments is an ophthalmologic information processing method, including: an analysis step of analyzing data of a subject's eye optically acquired by projecting light onto the subject's eye, and of specifying a lesion region in the subject's eye; a region editing step of specifying a changed region by changing the lesion region based on operation information corresponding to an operation content on an operating unit; and a display step of causing an image of the subject's eye to be displayed on a display means based on image data of the subject's eye, and of causing a region corresponding to the changed region in the image of the subject's eye to be displayed so as to be identifiable.

Further, another aspect of some embodiments is a recording mediums storing program of causing a computer to execute each step of the ophthalmologic information processing method described above.

DETAILED DESCRIPTION

Referring now to the drawings, exemplary some embodiments of an ophthalmologic information processing apparatus, an ophthalmologic system, an ophthalmologic information processing method, a program, and a recording medium according to some embodiments of the present invention are described below. Any of the contents of the documents cited in the present specification and arbitrary known techniques may be applied to the embodiments below.

An ophthalmologic system according to the embodiments includes an ophthalmologic information processing apparatus. An ophthalmologic information processing method according to the embodiments is performed by the ophthalmologic information processing apparatus. The ophthalmologic information processing method according to the embodiments can be executed by a computer according to a program.

The ophthalmologic information processing apparatus according to the embodiments can perform predetermined analysis processing and predetermined display processing on data of a subject's eye optically acquired using the ophthalmologic apparatus. The analysis processing includes processing for specifying a lesion region in the subject's eye. The display processing includes processing for displaying the specified lesion region so as to be identifiable. Hereinafter, a case will be described in which a geographic atrophy region in the fundus is mainly specified as a lesion region, but embodiments are not limited thereto.

The ophthalmologic apparatus optically acquires a data of a subject's eye by projecting light onto the subject's eye. Hereinafter, a case will be described in which the ophthalmologic apparatus acquires data of the subject's eye using optical coherence tomography (OCT), but the ophthalmologic apparatus according to the embodiments is not limited thereto. The ophthalmologic apparatus according to some embodiments has the function of acquiring a front image of the fundus of the subject's eye. Examples of the ophthalmologic apparatus having the function of acquiring the front image of the fundus of the subject's eye include an OCT apparatus, a fundus camera, a scanning laser ophthalmoscope (SLO), a slit lamp microscope, a surgical microscope, and the like. The ophthalmologic apparatus according to some embodiments has the function of measuring optical characteristics of the subject's eye. Examples of the ophthalmologic apparatus having the function of measuring optical characteristics of the subject's eye include a refractometer, a keratometer, a tonometer, a wave front analyzer, a specular microscope, a perimeter, and the like. The ophthalmologic apparatus according to some embodiments has the function of a laser treatment apparatus used for laser therapy.

FIG.1shows a block diagram of an example of the configuration of the ophthalmologic system according to the embodiments. The ophthalmologic system1according to the embodiments includes an ophthalmologic apparatus10, an ophthalmologic information processing apparatus (ophthalmologic image processing apparatus, ophthalmologic analysis apparatus)100, an operating apparatus180, and a display apparatus190.

The ophthalmologic apparatus10optically acquires the data of the fundus of the subject's eye by projecting light onto the subject's eye. The ophthalmologic apparatus10optically acquires the data of the fundus of the subject's eye by scanning the fundus of the subject's eye. For example, the ophthalmologic apparatus10acquires three-dimensional OCT data of the fundus of the subject's eye using OCT. The ophthalmologic apparatus10can obtain an image of the fundus of the subject's eye from the acquired data of the subject's eye. The images of the fundus include a tomographic image of the fundus, and a front image of the fundus. Examples of the tomographic image of the fundus include a B scan image, and the like. Examples of the front image of the fundus include a C scan image, a shadowgram, a projection image, and the like. The ophthalmologic apparatus10sends the acquired data of the subject's eye to the ophthalmologic information processing apparatus100.

In some embodiments, the ophthalmologic apparatus100and the ophthalmologic information processing apparatus100are connected via a data communication network. The ophthalmologic information processing apparatus100according to some embodiments receives data from one of a plurality of ophthalmologic apparatuses10selectively connected via the data communication network.

The ophthalmologic information processing apparatus100specifies a geographic atrophy region (atrophy region) by analyzing the acquired data of the subject's eye, and causes the geographic atrophy region in the front image or the tomographic image of the fundus to be displayed on the display apparatus190so as to be identifiable. The ophthalmologic information processing apparatus100can perform changing processing of the specified geographic atrophy region based on an operation content on the operating apparatus180described later by the user. Examples of the changing processing of the geographic atrophy region include addition of a geographic atrophy region, deletion of part or whole of a geographic atrophy region, change of the shape or the size of the specified geographic atrophy region, or the like. In some embodiments, the user changes the geographic atrophy region by operating the operating apparatus180while referring to a fluorescein fluorescence fundus angiogram or the like. The ophthalmologic information processing apparatus100can perform the following processing by setting a region in which the changing processing described above has been performed on the specified geographic atrophy region as a new geographic atrophy region.

The ophthalmologic information processing apparatus100causes a region corresponding to the geographic atrophy region in the front image of the fundus formed from the acquired data of the subject's eye to be highlighted (displayed in highlighted manner). The ophthalmologic information processing apparatus100according to some embodiments forms the front image of the fundus from the acquired data of the subject's eye, performs position matching between the formed front image and the specified geographic atrophy region, and causes the front image of the fundus, on which the image representing the geographic atrophy region is overlaid, to be displayed, the image having been performed position matching.

The ophthalmologic information processing apparatus100causes the region corresponding to the geographic atrophy region in the tomographic image of the fundus formed from the acquired data of the subject's eye to be highlighted. The ophthalmologic information processing apparatus100according to some embodiments forms the tomographic image of the fundus from the acquired data of the subject's eye, performs position matching between the formed tomographic image and the specified geographic atrophy region, and causes the tomographic image of the fundus, on which the image representing the geographic atrophy region is overlaid, to be displayed, the image having been performed position matching.

The operating apparatus180and the display apparatus190provide the function for exchanging information between the ophthalmologic information processing apparatus100and the user, such as displaying information, inputting information, and inputting operation instructions, as a user interface unit. The operating apparatus180includes an operating device such as a lever, a button, a key, and pointing device. The operating apparatus180according to some embodiments includes a microphone for inputting information using sound. The display apparatus190includes a display device such as a flat-panel display. In some embodiments, the functions of the operating apparatus180and the display apparatus190are realized using a device in which a device having an input function such as a touch panel display and a device having a display function are integrated. In some embodiments, the operating apparatus180and the display apparatus190include a graphical user interface (GUI) for inputting and outputting information.

FIG.2shows a block diagram of an example of the configuration of the ophthalmologic apparatus10according to the embodiments.

The ophthalmologic apparatus10includes an optical system for acquiring OCT data of the subject's eye. The ophthalmologic apparatus10has a function of performing swept source OCT, but the embodiments are not limited to this. For example, the type of OCT is not limited to swept source OCT, and it may be the spectral domain OCT or the like. The swept source OCT is a technique that splits light from a wavelength sweep type (i.e., a wavelength scanning type) light source into measurement light and reference light; superposes the measurement light returning from the object to be measured with the reference light to generate interference light; detects the interference light with a balanced photodiode or the like; and applies the Fourier transform etc. to the detection data acquired through the tuning of wavelengths and the scanning of the measurement light to form an image. The spectral domain OCT is a technique that splits light from a low coherence light source into measurement light and reference light; superposes the measurement light returning from the object to be measured with the reference light to generate interference light; detects the spectral distribution of the interference light with a spectrometer; and applies the Fourier transform etc. to the detected spectral distribution to form an image.

The ophthalmologic apparatus10includes a controller11, a data acquisition unit12, an image forming unit13, and a communication unit14.

The controller11controls each part of the ophthalmologic apparatus10. In particular, the controller11controls the data acquisition unit12, the image forming unit13, and the communication unit14.

The data acquisition unit12acquires data (three-dimensional OCT data) of the subject's eye by scanning the subject's eye using OCT. The data acquisition unit12includes an interference optical system12A and a scan optical system12B.

The interference optical system12A splits light from the light source (wavelength sweep type light source) into measurement light and reference light, makes returning light of the measurement light through the subject's eye and the reference light having traveled through a reference optical path interfere with each other to generate interference light, and detects the interference light. The interference optical system12A includes at least a fiber coupler and a light receiver such as a balanced photodiode. The fiber coupler splits the light from the light source into the measurement light and the reference light, and makes returning light of the measurement light through the subject's eye and the reference light having traveled through a reference optical path interfere with each other to generate interference light. The light receiver detects the interference light generated by the fiber coupler. The interference optical system12A may include the light source.

The scan optical system12B changes an incident position of the measurement light on the fundus of the subject's eye by deflecting the measurement light generated by the interference optical system12A, under the control of the controller11. The scan optical system12B includes, for example, an optical scanner disposed at a position optically conjugate with a pupil of the subject's eye. The optical scanner includes, for example, a galvano mirror that scans with the measurement light in the horizontal direction, a galvano mirror that scans with the measurement light in the vertical direction, and a mechanism that independently drives the galvano mirrors. With this, it is possible to scan the measurement light in an arbitrary direction in the fundus plane.

A detection result (detection signal) of the interference light obtained by the interference optical system12A is an interference signal representing the spectrum of the interference light.

The image forming unit13forms image data of a tomographic image of the fundus of the subject's eye based on the data of the subject's eye acquired by the data acquisition unit12, under the control of the controller11. This processing includes noise removal (noise reduction), filtering, fast Fourier transform (FFT), and the like. The image data acquired in this manner is a data set including a group of image data formed by imaging the reflection intensity profiles of a plurality of A lines. Here, the A lines are the paths of the measurement light in the subject's eye. In order to improve the image quality, it is possible to repeatedly perform scan with the same pattern a plurality of times to collect a plurality of data sets, and to compose (i.e., average) the plurality of data sets.

The image forming unit13can form a B scan image, a C scan image, a projection image, a shadowgram, etc., by performing various renderings on the acquired three-dimensional OCT data. An image in an arbitrary cross section such as the B scan image or the C scan image is formed by selecting pixels (voxels) on a designated cross section from the three-dimensional OCT data. The projection image is formed by projecting the three-dimensional OCT data in a predetermined direction (Z direction, depth direction, A scan direction). The shadowgram is formed by projecting a part of the three-dimensional OCT data (for example, partial data corresponding to a specific layer) in a predetermined direction.

The ophthalmologic apparatus10according to some embodiments includes a data processor that performs various kinds of data processing (e.g., image processing) and various kinds of analysis processing on the image formed by the image forming unit13. For example, the data processor performs various correction processes such as brightness correction and dispersion correction of images. The data processor can form volume data (voxel data) of the subject's eye by performing known image processing such as interpolation processing for interpolating pixels between tomographic images. In the case of displaying an image based on the volume data, the data processor performs rendering processing on the volume data so as to form a pseudo three-dimensional image viewed from a specific line-of-sight direction.

Each of the controller11and the image forming unit13includes a processor. The processor includes, for example, a circuit(s) such as, for example, a CPU (central processing unit), a GPU (graphics processing unit), an ASIC (application specific integrated circuit), and a PLD (programmable logic device). Examples of PLD include a simple programmable logic device (SPLD), a complex programmable logic device (CPLD), and a field programmable gate array (FPGA). The functions of the image forming unit13are realized by an image forming processor. In some embodiments, both of the functions of the controller11and the image forming unit13are realized by a single processor. In some embodiments, in case that the ophthalmologic apparatus10includes the data processor, the functions of the data processor are also realized by a processor.

The processor realizes, for example, the function according to the embodiments by reading out a computer program stored in a storage circuit or a storage device and executing the computer program. At least a part of the storage circuit or the storage apparatus may be included in the processor. Further, at least a part of the storage circuit or the storage apparatus may be provided outside of the processor.

The storage apparatus etc. stores various types of data. Examples of the data stored in the storage apparatus etc. include data (measurement data, photographic data, etc.) acquired by the data acquisition unit12and information related to the subject and the subject's eye. The storage apparatus etc. may store a variety of computer programs and data for the operation of each part of the ophthalmologic apparatus10.

The communication unit14performs communication interface processing for sending or receiving information with the ophthalmologic information processing apparatus100under the control of the controller11.

The ophthalmologic apparatus10according to some embodiments sends the image data of the subject's eye formed by the image forming unit13to the ophthalmologic information processing apparatus100.

The ophthalmologic apparatus10according to some embodiments includes a fundus camera for acquiring an image of the fundus of the subject's eye, a scanning laser ophthalmoscope for acquiring an image of the fundus of the subject's eye, or a slit lamp microscope. In some embodiments, the fundus image acquired by the fundus camera is a fluorescein fluorescence fundus angiogram or a fundus autofluorescence inspection image.

FIGS.3and4show block diagrams of examples of the configuration of the ophthalmologic information processing apparatus100according to the embodiments.FIG.3shows a functional block diagram of the ophthalmologic information processing apparatus100.FIG.4shows a functional block diagram of an analyzer200ofFIG.3.

The ophthalmologic information processing apparatus100according to the embodiments analyzes the data of the fundus of the subject's eye acquired by the ophthalmologic apparatus10to specify a geographic atrophy region in the fundus. The ophthalmologic information processing apparatus100causes the specified geographic atrophy region in the front image or the tomographic image of the fundus to be displayed on the display apparatus190so as to be identifiable.

The ophthalmologic information processing apparatus100includes a controller110, an image forming unit120, a data processor130, and a communication unit140.

The image forming unit120forms a B scan image, a C scan image, a projection image, a shadowgram, or the like from the three-dimensional OCT data acquired by the ophthalmologic apparatus10under the control of the controller110. The image forming unit120can form the above image in the same manner as the image forming unit13.

The data processor130performs various kinds of data processing (e.g., image processing) and various kinds of analysis processing on an image formed by the image forming unit120. For example, the data processor130performs various correction processes such as brightness correction and dispersion correction of images. The data processor130can form volume data (voxel data) of the subject's eye by performing known image processing such as interpolation processing for interpolating pixels between tomographic images. In the case of displaying an image based on the volume data, the data processor130performs rendering processing on the volume data so as to form a pseudo three-dimensional image viewed from a specific line-of-sight direction.

The data processor130performs predetermined data processing on the formed image of the subject's eye. The processor130includes an analyzer200, a position matching processor210, and a region editing unit220.

The analyzer200performs predetermined analysis processing on the image data of the fundus of the subject's eye formed by the image forming unit120(or the image data of the fundus of the subject's eye acquired by the ophthalmologic apparatus10). Examples of the analysis processing according to some embodiments include specifying processing of the geographic atrophy region in the fundus, generating processing of the distribution information of the geographic atrophy region, generating processing of the morphology information of the geographic atrophy region, generating processing of the distribution information of layer thickness in the fundus, and the like.

The analyzer200include a segmentation processor201, a region specifying unit202, a distribution information generator203, a morphology information generator204, and a layer thickness distribution information generator205.

The segmentation processor201specifies a plurality of layer regions in the A scan direction based on the data of the subject's eye acquired by the ophthalmologic apparatus10. The segmentation processor201according to some embodiments analyzes the three-dimensional OCT data to specify a plurality of partial data sets corresponding to a plurality of tissues of the subject's eye. The segmentation processing is image processing for specifying specific tissues and/or tissue boundaries. For example, the segmentation processor201obtains the gradients of the pixel values (i.e., brightness values) in each A scan image included in the OCT data, and specifies a position where the gradient value is large to be a tissue boundary. Note that the A scan image is one-dimensional image data extending in the depth direction of the fundus. The depth direction of the fundus is defined as, for example, the Z direction, the incident direction of the OCT measurement light, the axial direction, the optical axis direction of the interference optical system, or the like.

In a typical example, the segmentation processor201specifies a plurality of partial data sets corresponding to a plurality of layer tissues of the fundus by analyzing the three-dimensional OCT data representing the fundus (the retina, the choroid, etc.) and the vitreous body. Each partial data set is defined by the boundaries of the layer tissue. Examples of the layer tissue specified as the partial data set include a layer tissue constituting the retina. Examples of the layer tissue constituting the retina include the inner limiting membrane, the nerve fiber layer, the ganglion cell layer, the inner plexiform layer, the inner nuclear layer, the outer plexiform layer, the outer nuclear layer, the external limiting membrane, the photoreceptor layer, the retinal pigment epithelium layer, and the like. The segmentation processor201can specify a partial data set corresponding to the Bruch membrane, the choroid, the sclera, the vitreous body, or the like. The segmentation processor201according to some embodiments specifies a partial data set corresponding to the site of lesion. Examples of the site of lesion include a detachment part, an edema, a bleeding site, a tumor, a drusen, and the like.

The segmentation processor201according to some embodiments specifies, as the Bruch membrane, a layer tissue for a predetermined number of pixels on the sclera side with respect to the RPE, and acquires, as the partial data set of the Bruch membrane, the partial data set corresponding to the layer tissue.

The region specifying unit202specifies a region corresponding to two layer tissues for specifying the geographic atrophy region by analyzing a plurality of partial data sets of the layer tissues specified by the segmentation processor201. The region specifying unit202according to some embodiments specifies a first region and a second region, the first region corresponding to a layer tissue on the sclera side with respect to a region corresponding to the Bruch membrane, the second region corresponding to a layer region from a region corresponding to the inner limiting membrane to a region corresponding to the RPE. In some embodiments, the second region is a region corresponding to a layer tissue on the cornea side from the region corresponding to the Bruch membrane.

The distribution information generator203obtains a contrast ratio for each A scan based on the pixel values in the first region and the second region which are specified by the region specifying unit202, and generates two-dimensional distribution information of the contrast ratio in the fundus plane (plane orthogonal to the A scan direction). In some embodiments, the distribution information generator203generates the distribution information of the ratio of the integrated value of the pixel values of the first region specified by the region specifying unit202and the integrated value of the pixel values of the second region specified by the layer region specifying unit202, for each A scan. The distribution information generator203according to some embodiments obtains, as the contrast ratio, the ratio of the integrated value of the pixel values in the A scan direction of the second region to the integrated value of the pixel values in the A scan direction of the first region, and generates the two-dimensional distribution information of the obtained contrast ratio. The two-dimensional distribution information of the contrast ratio is hereinafter referred to as a contrast map.

The analyzer200specifies a position where the contrast ratio is large, as a position where signal components are attenuated due to the geographic atrophy, in the contrast map generated by the distribution information generator203. The analyzer200specifies the geographic atrophy region based on the specified position. For example, the analyzer200specifies, as the geographic atrophy region, a region including positions where the contrast ratio is equal to or larger than a predetermined threshold value, in the contrast map generated by the distribution information generator203. Techniques related to such a method for specifying a geographic atrophy region are disclosed in U.S. Unexamined Patent application Publication No. 2015/0201829, Japanese Unexamined Patent Application Publication No. 2015-136626, or Japanese Unexamined Patent Application Publication No. 2016-107148.

The morphology information generator204generates morphology information representing morphology of the specified geographic atrophy region. Examples of the morphology information include the area of the geographic atrophy region(s), the outer perimeter of the geographic atrophy region(s), and the like. The morphology information generator204can obtain the area of the geographic atrophy region(s) or the outer perimeter of the geographic atrophy region(s) by applying a known method to the image in which the geographic atrophy region(s) is(are) depicted. The morphology information generator204according to some embodiments generates the morphology information for each of the specified geographic atrophy regions. The morphology information generator204according to some embodiments generates, as the morphology information, the total value of morphological parameters (areas, outer perimeters) for each of the specified geographic atrophy regions. In some embodiments, the morphology information includes the number of the specified geographic atrophy regions.

The layer thickness distribution information generator205specifies a thickness in the A scan direction of each of the layer tissues by analyzing the partial data sets of the plurality of the layer tissues specified by the segmentation processor201, and generates the two-dimensional distribution information of the layer thickness of the each layer in the fundus plane. The layer thickness distribution information generator205according to some embodiments generates the two-dimensional distribution information (distribution information of the plane orthogonal to the A scan direction) of the layer thickness of the one or more layer tissues designated using the operating apparatus180. The layer thickness distribution information generator205according to some embodiments generates the two-dimensional distribution information of the layer thickness of at least one of the inner limiting membrane, the nerve fiber layer (NFL), the ganglion cell layer (GCL), the inner plexiform layer (IPL), the inner nuclear layer (INL), the outer plexiform layer (OPL), the outer nuclear layer (ONL), the external limiting membrane (ELM), the retinal pigment epithelium layer (RPE), the choroid, the sclera, and the choroidal-scleral interface (CSI), or two or more adjacent layers.

The position matching processor210performs position matching (registration) between a front image of the fundus formed by the image forming unit120and an image representing the geographic atrophy region specified by the analyzer200. The position matching processor210performs position matching between the tomographic image of the fundus formed by the image forming unit120and the image representing the geographic atrophy region specified by the analyzer200.

The position matching processing includes, for example, processing for detecting characteristic sites from the both images and processing for performing position matching of the both images on the base of the both characteristic sites. In some embodiments, the position matching processing includes processing for specifying a position in the image representing the geographic atrophy region in the front image or the tomographic image using position information of the geographic atrophy region in the front image or the tomographic image of the fundus and processing for performing position matching of the image representing the specified geographic atrophy region with respect to the front image or the tomographic image. The position matching processor210can perform position matching using known processing such as affine transformation for performing enlargement, reduction, rotation, or the like of the image.

The position matching processor210performs position matching between the tomographic image of the fundus formed by the image forming unit120and the image representing the geographic atrophy region specified by the analyzer200.

The region editing unit220performs the changing processing of the geographic atrophy region specified by the analyzer200as described above. Examples of the changing processing of the geographic atrophy region include addition of a geographic atrophy region, deletion of part or whole of a geographic atrophy region, change of the shape or the size of the specified geographic atrophy region, or the like. The region editing unit220performs the changing processing of the geographic atrophy region based on the operation information corresponding to the operation content on the operating apparatus180by the user. The region editing unit220according to some embodiments performs the changing processing of the geographic atrophy region based on a control content from a controller110.

The region editing unit220specifies a changed region by changing the geographic atrophy region specified by the analyzer200, based on the operation information corresponding to the operation content on the operating apparatus180. In some embodiments, the region editing unit220changes region specifying information for specifying a position or a shape of the geographic atrophy region obtained by performing analysis processing by the analyzer200, based on the operation information described above, and stores the changed region specifying information in a storage unit112. Thereby, the ophthalmologic information processing apparatus100can cause a region corresponding to the changed region in the image of the subject's eye to be displayed so as to be identifiable.

The region editing unit220can specify the changed region by changing the shape of the geographic atrophy region specified by the analyzer200, based on the operation information from the operating apparatus180. Thereby, a doctor or the like can change the shape of the geographic atrophy region specified by the analyzer200while referring to information obtained from another ophthalmologic apparatus, and can observe the morphology or the distribution of the geographic atrophy region in detail from the obtained changed region.

The region editing unit220can specify the changed region by adding a region designated based on the operation information from the operating apparatus180to the geographic atrophy region specified by the analyzer200. Thereby, a doctor or the like newly add the geographic atrophy region specified by the analyzer200while referring to information obtained from another ophthalmologic apparatus, and the morphology or the distribution of the geographic atrophy region can be observed in detail from the obtained changed region.

The region editing unit220can specify the changed region by deleting a region, which is designated based on the operation information from the operating apparatus180, from the geographic atrophy region specified by the analyzer200. Thereby, a doctor or the like can delete a desired region from geographic atrophy region specified by the analyzer200while referring to information obtained from another ophthalmologic apparatus, and can observe the morphology or the distribution of the geographic atrophy region in detail from the obtained changed region.

The analyzer200according to some embodiments newly specifies the geographic atrophy region in the subject's eye by performing an analysis again, to which analysis condition different from analysis condition before changing has been applied, on the changed region changed by the region editing unit220. The ophthalmologic information processing apparatus100causes a region corresponding to the geographic atrophy region specified newly by performing the analysis again by the analyzer200to be displayed on the display apparatus190so as to be identifiable. For example, the analyzer200specifies a new geographic atrophy region by analyzing the changed region, which is obtained by performing the changing processing described above on the geographic atrophy region specified under a first analysis condition, under a second analysis condition different from the first analysis condition. In some embodiments, the analysis condition can be changed by operating on the operating apparatus180by the user. In some embodiments, under the first analysis condition, the geographic atrophy region is specified by applying a first threshold value to a contrast map generated by the distribution information generator203. Further, under the second analysis condition, the geographic atrophy region is specified by applying a second threshold value different from the first threshold value to the contrast map generated by the distribution information generator203. The second threshold value may be lower than the first threshold value. For example, the controller110may cause an operation object operable using the operating apparatus180to be displayed on the display apparatus190, and may specify the geographic atrophy region by applying a threshold value corresponding to an operation content on the operation object. Examples of the operation object include a slide bar object whose changeable bar object position corresponds to the threshold value.

The communication unit140performs communication interface processing for sending or receiving information with the communication unit14of the ophthalmologic information processing apparatus100under the control of the controller110.

The controller110controls each part of the ophthalmologic information processing apparatus100. In particular, the controller110controls the image forming unit120, the data processor130, and the communication unit140. The controller110includes the main controller111and a storage unit112. The main controller111includes the display controller111A.

The display controller111A causes the various information to be displayed on the display apparatus190. For example, the display controller111A causes the fundus image (front image, tomographic image) of the subject's eye formed by the image forming unit120or the image of the data processing result obtained by the data processor130to be displayed on the display apparatus190. Examples of the image of the data processing result obtained by the data processor130include an image representing the geographic atrophy region specified by the analyzer200and an image representing the changed region changed by the region editing unit220. In particular, the display controller111A causes the fundus image of the subject's eye to be displayed on the display apparatus190, and causes the region corresponding to the geographic atrophy region (or changed region, the same applies hereinafter) in the fundus image to be displayed so as to be identifiable. The display controller111A according to some embodiments causes the fundus image of the subject's eye to be displayed on the display apparatus190, and causes the region corresponding to the geographic atrophy region in the fundus image to be highlighted. For example, the display controller111A causes the geographic atrophy region or its background region such that the brightness of the pixels in the geographic atrophy region or its background region is higher than the brightness of the pixels in the other regions to be displayed. The display controller111A according to some embodiments causes an image in which the image representing the geographic atrophy region performed position matching by the position matching processor210is overlaid on the fundus image to be displayed.

Further, the display controller111A causes the morphology information generated by the morphology information generator204to be displayed on the display apparatus190. The display controller111A according to some embodiments causes the morphology information generated by the morphology information generator204to be displayed on the display apparatus190in association with the geographic atrophy region corresponding to the morphology information.

The controller110controls each part of the ophthalmologic system1based on operation instruction signal corresponding to the operation content of the user on the operating apparatus180.

Each of the controller110, the image forming unit120, and the data processor130includes a processor. The functions of the image forming unit120is realized by an image forming processor. The functions of the data processor130is realized by a data processing processor. In some embodiments, at least two functions of the controller110, the image forming unit120, and the data processor130are realized by a single processor.

The storage unit112stores various kinds of data. Examples of the data stored in the storage unit112include data (measurement data, photographic data, etc.) acquired by the ophthalmologic apparatus10, image data formed by the image forming unit120, data processing result(s) obtained by the data processor130, information related to the subject and the subject's eye, and the like. The storage unit112may store a variety of computer programs and data for the operation of each part of the ophthalmologic information processing apparatus100.

The operating apparatus180is an example of the “operating unit” according to the embodiments. The display apparatus190is an example of the “display means” according to the embodiments. The geographic atrophy region is an example of the “lesion region” according to the embodiments.

Operation Example

Examples of the operation of the ophthalmologic information processing apparatus100according to some embodiments will be described.

FIG.5shows an example of the operation of the ophthalmologic information processing apparatus100according to the embodiments.FIG.5shows a flowchart of an example of the operation of the ophthalmologic information processing apparatus100. InFIG.5, it is assumed that the three-dimensional OCT data of the subject's eye acquired by the ophthalmologic apparatus10has already stored in the ophthalmologic information processing apparatus100(storage unit112).

The user selects a subject by inputting the subject ID using the operating apparatus180.

The storage unit112stores a database in which the inspection data of the subject is associated in advance corresponding to the subject ID. The controller110searches the database using the subject ID input in step S1as a search key, and acquires the inspection data corresponding to the subject ID. The display controller111A causes the inspection data corresponding to the subject ID acquired by searching the database to be displayed on the display apparatus190. The inspection data includes one or more fundus images of the subject's eye acquired in the past inspection.

(S3: Select Image of Subject's Eye)

The ophthalmologic information processing apparatus100causes the user to select the image of the subject's eye to be analyzed among the one or more images of the subject's eye in the inspection data of the subject displayed on the display apparatus190in step S2. The subject operates the operating apparatus180to select the image of the subject's eye to be analyzed. The controller110receives the operation instruction signal corresponding to the operation content of the operating apparatus180by the user.

The display controller111A selects the image of the subject's eye designated based on the operation instruction signal input in step S3to cause the selected image of the subject's eye to be displayed on the display apparatus190.

Next, the controller110determines whether or not to perform analysis of the geographic atrophy region for the image of the subject's eye displayed in step S4. The controller110can determine whether or not to perform analysis of the geographic atrophy region based on the operation instruction signal corresponding to the operation content to instruct analysis execution on the operating apparatus180.

When it is determined that the analysis of the geographic atrophy region is to be performed (S5: Y), the operation of the ophthalmologic information processing apparatus100proceeds to step S6. When it is determined that the analysis of the geographic atrophy region is not to be performed (S5: N), the operation of the ophthalmologic information processing apparatus100proceeds to step S9.

When it is determined that the analysis of the geographic atrophy region is to be performed in step S5(S5: Y), the controller110controls the analyzer200to specify the geographic atrophy region by performing analysis of the geographic atrophy region. Details of step S6will be described later. The controller110stores region specification information for specifying a position or a shape of the geographic atrophy region on the fundus in the storage unit112in association with the subject or the subject's eye.

(S7: Perform Analysis of Morphology)

Subsequently, the controller110controls the morphology information generator204to calculate an area and an outer perimeter of each of the geographic atrophy regions specified in step S6. The morphology information generator204generates the morphology information including the total value of the areas of the geographic atrophy regions, the total value of the outer perimeters of the geographic atrophy regions, and the number of the specified geographic atrophy regions. The controller110stores the morphology information generated in step S7along with the above region specification information in the storage unit112in association with the subject or the subject's eye.

The controller110according to some embodiments controls the layer thickness distribution information generator205to generate the two-dimensional distribution information of the layer thickness of each layer in the fundus. The controller110stores the distribution information generated in step S7along with the above region specification information in the storage unit112in association with the subject or the subject's eye.

Next, the controller110controls the position matching processor210to perform position matching between the front image of the fundus formed by the image forming unit120in advance and the image representing the geographic atrophy region specified in step S6. The display controller111A causes the image representing the geographic atrophy region superimposed on the front image of the fundus to be displayed on the display apparatus190. Here, the front image of the fundus may be a shadowgram ranging from RPE to the Bruch membrane. Further, the display controller111A causes the morphology information generated in step S7to be displayed on the display apparatus190in association with the geographic atrophy region corresponding to the morphology information.

In the same manner, the controller110controls the position matching processor210to perform position matching between the tomographic image formed by the image forming unit120in advance and the image representing the geographic atrophy region specified in step S6. The display controller111A causes the image representing the geographic atrophy region superimposed on the tomographic image of the fundus to be displayed on the display apparatus190. Further, the display controller111A causes the morphology information generated in step S7to be displayed on the display apparatus190in association with the geographic atrophy region corresponding to the morphology information.

Next, the controller110determines whether or not to edit the geographic atrophy region specified in step S6. The controller110can determine whether or not to change the geographic atrophy region based on the operation instruction signal corresponding to the operation content for instructing to edit the region on the operating apparatus180.

When it is determined that the geographic atrophy region is to be changed (S9: Y), the operation of the ophthalmologic information processing apparatus100proceeds to step S10. When it is determined that the geographic atrophy region is not to be changed (S9: N), the ophthalmologic information processing apparatus100terminates the operation (END).

When it is determined that the geographic atrophy region is to be changed in step S9(S9: Y), the controller110controls the region editing unit220to perform changing processing of the geographic atrophy region based on the operation instruction signal corresponding to the operation content on the operating apparatus180by the user.

For example, as shown inFIG.6, the region editing unit220adds a new geographic atrophy region R1by designating a desired region (OP1) for the front image of the fundus using the operating apparatus180.

For example, as shown inFIG.7, the region editing unit220deletes a geographic atrophy region R2from the one or more geographic atrophy regions specified by the analyzer200by designating a desired region (OP2) for the front image of the fundus using the operating apparatus180.

The controller110stores region specification information for specifying a position or a shape of the changed region obtained by performing changing processing in the storage unit112in association with the subject or the subject's eye.

(S11: Perform region analysis again?)

Subsequently, the controller110determines whether or not to perform analysis of the changed region specified in step S10, again. The controller110can determine whether or not to perform analysis of the changed region again based on the operation instruction signal corresponding to the operation content to instruct re-analysis execution on the operating apparatus180.

When it is determined that the re-analysis of the changed region is to be performed (S11: Y), the operation of the ophthalmologic information processing apparatus100proceeds to step S12. When it is determined that the re-analysis of the changed region is not be performed (S11: N), the ophthalmologic information processing apparatus100terminates the operation (END).

(S12: Perform analysis of morphology)

When it is determined that the re-analysis of the changed region is to be performed in step S11(S11: Y), the controller110controls the morphology information generator204to calculate an area and an outer perimeter of each of the changed regions specified in step S10. The morphology information generating unit204generates morphology information using the in the same manner as step S7. The controller110stores the morphology information generated in step S12along with the above region specification information in the storage unit112in association with the subject or the subject's eye.

Next, the controller110controls the position matching processor210to perform position matching between the front image of the fundus formed by the image forming unit120in advance and the image representing the changed region specified in step S10. The display controller111A causes the image representing the changed region superimposed on the front image of the fundus to be displayed on the display apparatus190. Here, the front image of the fundus may be a shadowgram ranging from RPE to the Bruch membrane. Further, the display controller111A causes the morphology information generated in step S12to be displayed on the display apparatus190in association with the changed region corresponding to the morphology information.

In the same manner, the controller110controls the position matching processor210to perform position matching between the tomographic image of the fundus formed by the image forming unit120in advance and the image representing the changed region specified in step S10. The display controller111A causes the image representing the changed region superimposed on the tomographic image of the fundus to be displayed on the display apparatus190. Further, the display controller111A causes the morphology information generated in step S12to be displayed on the display apparatus190in association with the changed region corresponding to the morphology information. This terminates the operation of the ophthalmologic information processing apparatus100(END).

Next, an example of the operation of step S6inFIG.5will be described while referring toFIGS.8to14.

FIG.8shows a flow chart of an example of the operation of step S6inFIG.5.FIG.9is an operation explanatory diagram for step S22.FIG.10is an operation explanatory diagram for step S23.FIG.11Ais an operation explanatory diagram for step S24.FIG.11Bis an operation explanatory diagram for step S25.FIG.12is an operation explanatory diagram for step S26.FIGS.13and14are operation explanatory diagrams for step S27.

When it is determined that the analysis of the geographic atrophy region is to be performed (S5: Y), the controller110reads out the data of the fundus of the subject's eye stored in the storage unit112, and controls the image forming unit120to form a B scan image based on the read data. In some embodiments, in step S21, the B scan image is acquired from the ophthalmologic apparatus10.

The controller110controls the segmentation processor201to perform segmentation processing on the B scan image acquired in step S21. The segmentation processor201specifies a plurality of layer regions in the A scan direction for the B scan image acquired in step S21. As shown inFIG.9, the segmentation processor201specifies the inner limiting membrane300, the nerve fiber layer, the ganglion cell layer, the inner plexiform layer, the inner nuclear layer, the outer plexiform layer, the outer nuclear layer, the external limiting membrane, the photoreceptor layer, the RPE301which constitute the retina, in the B scan image IMG1. Further, the segmentation processor201specifies, as the Bruch membrane302, a layer tissue for a predetermined number of pixels on the sclera side with respect to the specified RPE301.

Subsequently, the controller110controls the data processor130to generate the contrast map using the result of the segmentation processing in step S22. That is, the region specifying unit202specifies the first region and the second region by analyzing the partial data sets of the plurality of layer regions specified by the segmentation processor201. The first region corresponds to the layer tissues on the sclera side from the region corresponding to the Bruch membrane302. The second region corresponds to the layer tissues from the region corresponding to the inner limiting membrane300to the region corresponding to the RPE301.

The distribution information generator203obtains, as the contrast ratio, the ratio of the integrated value of the pixel values in the A scan direction of the second region to the integrated value of the pixel values in the A scan direction of the first region, and generates the two-dimensional distribution information of the obtained contrast ratio (FIG.10).

Next, the controller110controls the data processor130to perform smoothing processing on the contrast map generated in step S23. Focusing on the fact that the change in pixel value between adjacent pixels generally tends to be small and that the noise component superimposed on the pixel value is also similar, the contrast map from which the noise component is removed by performing smoothing processing can be obtained (FIG.11A).

Subsequently, the controller110controls the data processor130to perform binarization processing on the contrast map obtained after the smoothing processing in step S24. Thereby, a binarized map as shown inFIG.11Bis obtained.

The controller110controls the analyzer200to search a region by applying a known region expansion method to the binarized map obtained in step S25(FIG.12).

The controller110controls the analyzer200to extract the contour of the region by performing known contour extraction processing on the region obtained by searching in step S26(FIG.13). The analyzer200specifies the geographic atrophy region based on the extracted contour (FIG.14). This terminates the processing of step S6inFIG.5(END).

FIG.15shows an example of the analysis information displayed on the display apparatus190in some embodiments.

For example, in step S8or step S13, the display controller111A causes the image IMGX representing the geographic atrophy region superimposed on the shadowgram (the front image of the fundus) IMG2to be displayed on the display apparatus190.

Further, the display controller111A can cause the morphology information350including the total value of the area(s) of the geographic atrophy region(s), the total value of the outer perimeter(s) of the geographic atrophy region(s), and the number of the geographic atrophy region(s) to be displayed on the display apparatus190. The display controller111A according to some embodiments causes the morphology information of each of the geographic atrophy regions to be displayed on the display apparatus190in association with the geographic atrophy region corresponding to the morphology information. Thereby, the morphology of each of the geographic atrophy regions can be observed in detail.

FIG.16shows another example of the analysis information displayed on the display apparatus190in some embodiments.

For example, in step S8or step S13, the display controller111A causes the image IMGY (image of B scan cross section) representing the geographic atrophy region superimposed on the B scan image IMG3of the fundus to be displayed on the display apparatus190. Thereby, the morphology of the geographic atrophy region can be observed in the B scan image in detail.

Modification Example

The configuration according to some embodiments is not limited to the above configuration.

First Modification Example

The relative position of the geographic atrophy region with respect to the macular region (fovea) is effective for the diagnosis of atrophic AMD. The ophthalmologic information processing apparatus according to a modification example of some embodiments analyzes the data of the fundus of the subject's eye acquired by the ophthalmologic apparatus to generate position information representing a position or a distance of the geographic atrophy region with respect to the macular region (fovea) on the fundus.

In the following, the ophthalmologic information processing apparatus according to the modification example of the embodiments will be described focusing on differences from the ophthalmologic information processing apparatus according to the above embodiments. The difference between the configuration of the ophthalmologic information processing apparatus according to the present modification example and the configuration of the ophthalmologic information processing apparatus100described above is the analyzer.

FIG.17shows a block diagram of an example of the configuration of the analyzer200aaccording to the modification example of the embodiments. InFIG.17, parts similar to those inFIG.4are denoted by the same reference symbols, and description thereof is omitted as appropriate.

In the present modification example, an analyzer200aaccording to the modification example shown inFIG.17is provided instead of the analyzer200in the data processor130shown inFIG.3. The analyzer200adiffers from the analyzer200in that a position information generator206ais added to the analyzer200.

The analyzer200aspecifies a region corresponding to the fovea by analyzing three-dimensional OCT data of the subject's eye using a known method, and specifies a region having a predetermined radius around the fovea as the macular region.

The position information generator206agenerates the position information. The position information represents a relative position of a representative position of the geographic atrophy region with respect to a representative position of the macular region specified by the analyzer200a, position information representing a distance between both the representative positions, vector information indicating a movement direction or a movement distance of the representative position of the geographic atrophy region in a predetermined period, or vector information indicating a movement direction or a movement distance of the representative position of the geographic atrophy region with respect to the representative position of the macular region in a predetermined period. Examples of the representative position of the macular region include a position of the fovea, a position of the center of gravity of the macular region, the closest (or farthest) position to the geographic atrophy region in the outline of the macular region, and the like. Examples of the representative position of the geographic atrophy region include a center position of the geographic atrophy region, a position of the center of gravity of the geographic atrophy region, the closest (or farthest) position to the macular region (or the fovea) in the outline of the geographic atrophy region, and the like. The display controller111A according to the modification example of some embodiments causes the position information, which is generated by the position information generator206a, to be displayed on the display apparatus190in association with the geographic atrophy region corresponding to the position information.

FIG.18shows an example of the analysis information displayed on the display apparatus190in the modification example of the embodiments.

For example, the display controller111A causes the image IMGX representing the geographic atrophy region and the image IMGZ representing the position (range) of the macular region specified by the analyzer200asuperimposed on the shadowgram (the front image of the fundus) IMG2to be displayed on the display apparatus190. The image IMGZ may be an image representing a position of the fovea.

Further, the display controller111A can cause the position information representing the relative position of the geographic atrophy region with respect to the macular region, in addition to the morphology information including the total value of the area(s) of the geographic atrophy region(s), the total value of the outer perimeter(s) of the geographic atrophy region(s), or the number of the geographic atrophy region(s) to be displayed on the display apparatus190. The display controller111A according to some embodiments causes the position information of each of the geographic atrophy regions to be displayed on the display apparatus190in association with the geographic atrophy region corresponding to the position information. Thereby, the position of each of the geographic atrophy regions can be observed in detail.

FIG.19shows another example of the analysis information displayed on the display apparatus190in the modification example of the embodiments.

For example, the display controller111A causes the image IMGY (image of B scan cross section) representing the geographic atrophy region and the image IMGZ1representing the position (range) of the macular region specified by the analyzer200asuperimposed on the B scan image IMG3of the fundus to be displayed on the display apparatus190. Thereby, the position of geographic atrophy region with respect of the macular region can be observed in the B scan image in detail.

Second Modification Example

In some embodiments, a new geographic atrophy region is specified by newly analyzing the changed region specified by the region editing unit220, and morphology information, position information, or the like of the specified geographic atrophy region is obtained.

In the following, the ophthalmologic information processing apparatus according to the modification example of the embodiments will be described focusing on differences from the ophthalmologic information processing apparatus according to the above embodiments. The difference between the ophthalmologic information processing apparatus according to the present modification example and the ophthalmologic information processing apparatus100described above is the operation content executed by the controller110and the data processor130.

FIG.20shows an example of the operation of the ophthalmologic information apparatus according to the modification example of the embodiments.FIG.20shows a flow chart of an operation example of the ophthalmologic information apparatus according to the present modification example. InFIG.20, like reference numerals designate like parts as inFIG.5, and the same description may not be repeated.

In the present modification example, steps S1to S11are the same as those inFIG.5.

When it is determined that the re-analysis of the changed region is to be performed (S11: Y), the controller110sets the second analysis condition different from the first analysis condition used in the process of specifying the geographic atrophy region in step S6. In some embodiments, the second analysis condition is an analysis condition for newly specifying a geographic atrophy region which has not been specified under the first analysis condition (an analysis condition in which the detection sensitivity (specification sensitivity) of the geographic atrophy region is higher than the first analysis condition).

Next, the controller110controls the analyzer200to specify the new geographic atrophy region by performing analysis of the changed region. Step S32is the same as step S6. The controller110stores region specification information for specifying a position and a shape of the new geographic atrophy region on the fundus in the storage unit112in association with the subject or the subject's eye.

(S33: Perform analysis of morphology)

Subsequently, the controller110controls the morphology information generator204to calculate an area and an outer perimeter of each of the new geographic atrophy regions specified in step S32. The morphology information generating unit204generates morphology information, in the same manner as step S7. The controller110stores the morphology information generated in step S33along with the above region specification information in the storage unit112in association with the subject or the subject's eye.

Next, the controller110controls the position matching processor210to perform position matching between the front image of the fundus formed by the image forming unit120in advance and the image representing the geographic atrophy region specified newly in step S32. The display controller111A causes the image representing the geographic atrophy region superimposed on the front image of the fundus to be displayed on the display apparatus190. Here, the front image of the fundus may be a shadowgram ranging from RPE to the Bruch membrane. Further, the display controller111A causes the morphology information generated in step S33to be displayed on the display apparatus190in association with the geographic atrophy region corresponding to the morphology information.

In the same manner, the controller110controls the position matching processor210to perform position matching between the tomographic image of the fundus formed by the image forming unit120in advance and the image representing the geographic atrophy region specified newly in step S32. The display controller111A causes the image representing the geographic atrophy region superimposed on the tomographic image of the fundus to be displayed on the display apparatus190. Further, the display controller111A causes the morphology information generated in step S33to be displayed on the display apparatus190in association with the geographic atrophy region corresponding to the morphology information. This terminates the operation of the ophthalmologic information processing apparatus100(END).

Third Modification Example

The ophthalmologic apparatus according to some embodiments has at least one of the function of the ophthalmologic information processing apparatus100, the function of the operating apparatus180, and the function of the display apparatus190, in addition to the function of the ophthalmologic apparatus10.

In the following, the ophthalmologic apparatus according to a modification example of some embodiments will be described focusing on differences from the ophthalmologic apparatus according to the above embodiments.

FIG.21shows a block diagram of an example of the configuration of the ophthalmologic apparatus10baccording to the modification example of the embodiments. InFIG.21, components similar to those inFIG.2are given the same reference numerals. The description of such components is basically omitted.

The difference between the configuration of the ophthalmologic apparatus10baccording to the present modification example and the configuration of ophthalmologic apparatus10according to the above embodiments is that the ophthalmologic apparatus10bhas the function of the ophthalmologic information processing apparatus100, the function of the operating apparatus180, and the function of the display apparatus190. The ophthalmologic apparatus10bincludes a controller11b, the data acquisition unit12, the image forming unit13, an ophthalmologic information processor15b, an operating unit16b, and a display unit17b.

The controller11bcontrols each part of the ophthalmologic apparatus10b. In particular, the controller11bcontrols the data acquisition unit12, the image forming unit13, the ophthalmologic information processor15b, the operating unit16b, and the display unit17b.

The ophthalmologic information processor15bhas the same configuration as the ophthalmologic information processing apparatus100, and has the same function as the ophthalmologic information processing apparatus100. The operating unit16bhas the same configuration as the operating apparatus180, and has the same function as the operating apparatus180. The display unit17bhas the same configuration as the display apparatus190, and has the same function as the display apparatus190.

According to the present modification example, an ophthalmologic apparatus capable of observing in detail the morphology and the distribution of the geographic atrophy region in a compact configuration can be provided.

Effects

Hereinafter, the effects of the ophthalmologic information processing apparatus, the ophthalmologic system, the ophthalmologic information processing method, and the program according to some embodiments will be described.

An ophthalmologic information processing apparatus (100) according to some embodiments includes an analyzer (200,200a), a storage unit (112), a region editing unit (220), and a display controller (111A). The analyzer is configured to analyze data of a subject's eye optically acquired by projecting light onto the subject's eye, and to specify a lesion region (geographic atrophy region) in the subject's eye. The storage unit stores image data of the subject's eye. The region editing unit is configured to specify a changed region by changing the lesion region based on operation information corresponding to an operation content on an operating unit (operating apparatus180). The display controller is configured to cause an image of the subject's eye to be displayed on a display means based on the image data stored in the storage unit, and to cause a region corresponding to the changed region in the image of the subject's eye to be displayed so as to be identifiable.

According to such a configuration, the changed region is specified by changing the lesion region specified by analyzing the data of the subject's eye acquired optically, the fundus image of the subject's eye is displayed on the display means, and the changed region in the fundus image is displayed so as to be identifiable. Therefore, the morphology or the distribution of the changed region can be grasped in detail even when the detection accuracy of the lesion region is not sufficient. Thereby, doctors or the like can make accurate diagnosis for patients.

In the ophthalmologic information processing apparatus according to some embodiments, the region editing unit is configured to specify the changed region by changing a shape of the lesion region based on the operation information.

According to such a configuration, a doctor or the like can change the shape of the specified lesion region while referring to information obtained from another ophthalmologic apparatus, and can observe the morphology or the distribution of the lesion region in detail from the obtained changed region.

In the ophthalmologic information processing apparatus according to some embodiments, the region editing unit is configured to specify the changed region by adding a regions designated based on the operation information to the lesion region.

According to such a configuration, a doctor or the like can add a new lesion region to the specified lesion region while referring to information obtained from another ophthalmologic apparatus, and the morphology or the distribution of the lesion region can be observed in detail from the obtained changed region.

In the ophthalmologic information processing apparatus according to some embodiments, the region editing unit is configured to specify the changed region by deleting a region designated based on the operation information from the lesion region.

According to such a configuration, a doctor or the like can delete at least a part of the specified lesion region while referring to information obtained from another ophthalmologic apparatus, and can observe the morphology or the distribution of the lesion region in detail from the obtained changed region.

In the ophthalmologic information processing apparatus according to some embodiments, the analyzer is configured to newly specify the lesion region in the subject's eye by performing an analysis again, in which analysis conditions have been changed, on the changed region changed by the region editing unit. The display controller is configured to cause a region corresponding to the lesion region newly specified by performing the analysis again by the analyzer to be displayed on the display means so as to be identifiable.

According to such a configuration, the ophthalmologic information processing apparatus capable of newly specifying a lesion region for a desired region and of grasping the morphology or the distribution of the specified new lesion region in detail can be provided.

In the ophthalmologic information processing apparatus according to some embodiments, the analyzer is configured to specify a new lesion region by specifying the lesion region under a first analysis condition and analyzing the changed region under a second analysis condition different from the first analysis condition.

According to such a configuration, by repeating the process of specifying he lesion region for the desired region alone, the lesion region can be newly specified and the morphology or the distribution of the lesion region specified newly can be observed in detail.

In the ophthalmologic information processing apparatus according to some embodiments, the data of the subject's eye is data of a fundus of the subject's eye. The analyzer includes a segmentation processor (201) and a distribution information generator (203). The segmentation processor is configured to specify a plurality of layer regions in an A scan direction based on the data. The distribution information generator is configured to generate distribution information on ratio (contrast map) between integrated values of pixel values in the A scan direction of the layer regions located on a sclera side with reference to a Bruch membrane and integrated values of pixel values in the A scan direction of the layer regions located on a cornea side with reference to the Bruch membrane, the layer regions being specified by the segmentation processor. The analyzer is configured to specify the lesion region based on the distribution information.

According to such a configuration, the lesion region is specified from the data acquired using optical coherence tomography and changed region obtained by changing the specified lesion region is displayed so as to be identifiable. Thereby, the morphology or the distribution of the lesion region can be observed in detail while reducing the burden on the subject.

The ophthalmologic information processing apparatus according to some embodiments includes a position matching processor (210). The position matching processor is configured to perform position matching between a fundus image of the subject's eye and an image representing the changed region specified based on the distribution information. The display controller is configured to cause the image representing the changed region, which has been performed position matching by the position matching processor, to be laid on the fundus image and to be displayed.

According to such a configuration, the image representing the changed region obtained by changing the specified lesion region is laid on the fundus image and is displayed. Thereby, the morphology or the distribution of the lesion region can be easily grasped.

An ophthalmologic system according to some embodiments includes a data acquisition unit (12) configured to acquire the data by scanning the subject's eye using optical coherence tomography; the display means; and the ophthalmologic information processing apparatus described in any one of the above.

According to such a configuration, the changed region is specified by changing the lesion region specified by analyzing the data of the subject's eye, and the changed region in the fundus image is displayed so as to be identifiable. Thereby, the morphology or the distribution of the changed region can be grasped in detail and a doctor or the like can make accurate diagnosis for patients, even when the detection accuracy of the lesion region is not sufficient.

An ophthalmologic information processing method includes an analysis step, a region editing step, and a display step. The analysis step is performed to analyze data of a subject's eye optically acquired by projecting light onto the subject's eye, and of specifying a lesion region (geographic atrophy region) in the subject's eye. The region editing step is performed to specify a changed region by changing the lesion region based on operation information corresponding to an operation content on an operating unit (operating apparatus180). The display step is performed to cause an image of the subject's eye to be displayed on a display means (display apparatus190) based on image data of the subject's eye, and to cause a region corresponding to the changed region in the image of the subject's eye to be displayed so as to be identifiable.

According to such a configuration, the changed region is specified by changing the lesion region specified by analyzing the data of the subject's eye acquired optically, the fundus image of the subject's eye is displayed on the display means, and the changed region in the fundus image is displayed so as to be identifiable. Therefore, the morphology or the distribution of the changed region can be grasped in detail even when the detection accuracy of the lesion region is not sufficient. Thereby, doctors or the like can make accurate diagnosis for patients.

In the ophthalmologic information processing method according to some embodiments, the region editing step is performed to specify the changed region by changing a shape of the lesion region based on the operation information.

According to such a configuration, a doctor or the like can change the shape of the specified lesion region while referring to information obtained from another ophthalmologic apparatus, and can observe the morphology or the distribution of the lesion region in detail from the obtained changed region.

In the ophthalmologic information processing method according to some embodiments, the region editing step to specify changed region by adding a region designated based on the operation information to lesion region.

According to such a configuration, a doctor or the like can add a new lesion region to the specified lesion region while referring to information obtained from another ophthalmologic apparatus, and the morphology or the distribution of the lesion region can be observed in detail from the obtained changed region.

In the ophthalmologic information processing method according to some embodiments, the region editing step is performed to specify the changed region by deleting a region designated based on the operation information from the lesion region.

According to such a configuration, a doctor or the like can delete at least a part of the specified lesion region while referring to information obtained from another ophthalmologic apparatus, and can observe the morphology or the distribution of the lesion region in detail from the obtained changed region.

In the ophthalmologic information processing method according to some embodiments, the analysis step is performed to newly specify the lesion region in the subject's eye by performing an analysis again, in which analysis conditions have been changed, on the changed region changed in the region editing step. The display step is performed to cause a region corresponding to the lesion region newly specified by performing the analysis again in the analysis step to be displayed on the display means so as to be identifiable.

According to such a configuration, a lesion region can be newly specified for a desired region and the morphology or the distribution of the specified new lesion region can be grasped in detail.

A program according to some embodiments causes a computer to execute each step of the ophthalmologic information processing method described in any of the above.

According to such a configuration, the changed region is specified by changing the lesion region specified by analyzing the data of the subject's eye, and the changed region in the fundus image is displayed so as to be identifiable. Therefore, the program for grasping the morphology or the distribution of the changed region in detail can be provided even when the detection accuracy of the lesion region is not sufficient.

A program for realizing the ophthalmologic information processing method according to some embodiments can be stored in any kind of computer non-transitory recording medium. The recording medium may be an electronic medium using magnetism, light, magneto-optical, semiconductor, or the like. Typically, the recording medium is a magnetic tape, a magnetic disk, an optical disk, a magneto-optical disk, a flash memory, a solid state drive, or the like.

The computer program may be transmitted and received through a network such as the Internet, LAN, etc.

Configurations described above are merely examples for preferably implementing the present invention. One who intends to implement the present invention may arbitrarily modify (omission, replacement, addition, etc.) within the scope of the invention.