JPH10179517A - Ophthalmic image processing device and ophthalmic image processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately obtain the quantitative size of each part of an eye to be examined for forming the image thereof. SOLUTION: The image data of an examined eye E photographed with a retinal camera is collected and, then, physical and optical quantitative data corresponding to the physical and the optical characteristics of the examined eye E measured with a different ophthalmic devices are read, thereby computing the quantitative size of the examined eye in an arithmetic operation part 33, on the basis of the physical and optical quantitative data. In addition, an image editing part 54 files the graduated image data of the examined eye E corresponding to the quantitative size, and the graduated image of the examined eye E is shown on a display 38. As a result, the position of the three-dimensional lesion of the examined eve E or the quantitative size of each part can be accurately obtained, filed and imaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ophthalmologic image processing apparatus and an ophthalmologic image processing method.

[0002]

2. Description of the Related Art Conventionally, a photographing apparatus for photographing an eye to be examined with an auto focus has been disclosed in, for example,
As disclosed in Japanese Patent Laid-Open No. 1 (1993), only the lens information of the variable power lens is used for calculating the photographing magnification of the subject's eye. Japanese Patent Application Laid-Open No. 3-128034 proposes an apparatus for recording position information of a focusing lens on a film as diopter information of a subject's eye, and Japanese Patent Application Laid-Open No. 3-60632 discloses an apparatus. There has been proposed an apparatus for measuring a position by converting the position into a height difference of a fundus of a subject's eye.

[0003]

However, in the above-mentioned conventional apparatus disclosed in Japanese Patent Application Laid-Open No. 55-122531,
Since the distance information is not used for calculating the photographing magnification and only the magnification of the variable power lens is used, it is difficult to obtain the actual dimensions of the eye to be inspected.

In the apparatuses disclosed in JP-A-3-128034 and JP-A-3-60632, distance information is used. However, since these are distance information in the direction of the optical axis, the optical information cannot be obtained at a photographing magnification obtained from this. It is difficult to accurately calculate the dimensions of the eye to be examined other than the axial direction.

Further, Japanese Patent Application Laid-Open No. Hei 8-206081 discloses that an eye to be inspected is photographed on a recording medium using a photographing lens including a focusing lens, a light beam from the eye to be inspected is received by a photoelectric sensor, and the signal is received by a signal from the sensor. A photographing device having a composite recording unit that drives a focusing lens to focus the image, calculates photographing magnification information by using a calculation unit using the focusing information at this time, and combines the photographing magnification information with an eye image to be inspected to record. An apparatus is disclosed.

However, even in the case of this photographing apparatus,
Since the focus lens position information is used for calculating the photographing magnification, the distance information in the optical axis direction is also used. It is difficult to calculate the dimensions accurately.

[0007] In particular, in the prior art, it is difficult to accurately obtain the image of the position of the lesion in the eye to be examined, which has a three-dimensional shape, and the quantitative dimensions of the retinal artery, retinal vein, and the like.

The present invention solves the above-mentioned problems of the prior art, and accurately obtains the position of a lesion in a three-dimensional eye to be examined and quantitative dimensions of a retinal artery, a retinal vein and the like. It is an object of the present invention to provide an ophthalmologic image processing apparatus and an ophthalmologic image processing method that can be imaged and are extremely effective for grasping a temporal change of a lesion of an eye to be examined and for surgery on the eye to be examined.

[0009]

According to the first aspect of the present invention,
An ophthalmologic image processing apparatus for collecting an image of an eye to be examined and filing the image of the eye to be inspected, comprising a display means for displaying an image of the eye to be inspected, and image data of the eye to be inspected taken by an ophthalmologic image photographing apparatus. Image storage means, quantitative data storage means for storing physical and optical quantitative data corresponding to the physical and optical characteristics of the eye to be measured measured by another ophthalmic apparatus, and image data stored in the quantitative data storage means. Computing means for computing quantitative dimensions of the eye to be examined based on physical and optical quantitative data corresponding to the physical characteristics and optical characteristics of the optometry, and based on the computation results of the computing means. In addition, the image data of the eye to be inspected stored in the image storage means is read out, and the image data of the eye to be inspected with a scale indicating its quantitative dimension is filed in the image storage means, and the scaled image data is read. It is characterized in that it has an image processing means for displaying an image on the display means.

According to a second aspect of the present invention, there is provided an ophthalmologic image processing method which collects image data of an eye to be inspected photographed by an ophthalmologic image photographing apparatus, and measures physical characteristics and optical characteristics of the eye to be inspected measured by another ophthalmic apparatus. Physical and optical quantitative data according to the characteristics are taken in, the quantitative dimensions of the eye to be inspected are calculated, and the image data of the eye with the scale according to the calculated quantitative dimensions is filed, An image of the eye to be examined with a scale is displayed on a display means.

According to the ophthalmologic image processing method of the present invention realized by the configuration of the ophthalmologic image processing apparatus of the present invention, image data of the eye to be inspected taken by the ophthalmologic image capturing apparatus is collected and measured by another ophthalmic apparatus. Physical characteristics of the eye to be inspected, physical and optical quantitative data corresponding to the optical characteristics are taken in, and the quantitative dimensions of the eye to be inspected are calculated by arithmetic means based on the physical and optical quantitative data. On the basis of the calculation result of the calculating means, the image processing means filing the image data of the eye with the scale according to the quantitative dimension and displaying the image of the eye with the scale on the display means. Therefore, it is possible to accurately determine the position of the lesion in the eye to be examined, which is a three-dimensional shape, and the quantitative dimensions of each part, and file and image it. It is extremely effective in understanding and the subject's eye surgery and the like.

According to a third aspect of the present invention, there is provided an ophthalmologic image processing apparatus for collecting an image of an eye to be examined and filing the image of the eye to be inspected, wherein a display means for displaying an image of the eye to be inspected;
Image storage means for storing fundus image data of the subject's eye photographed by a fundus camera, data of the refractive index of the subject's eye measured by a refractometer, data of the corneal diameter of the subject's eye measured by a keratometer, and an eye axial length measuring device Quantitative data storage means for storing the data of the axial length of the eye to be measured according to, the refractive index of the eye, corneal diameter and the axial length data stored in the quantitative data storage means, based on the data of the eye, Calculating means for calculating the quantitative dimensions of the fundus, based on the calculation result of the calculating means, reads out the image data of the eye to be examined stored in the image storage means, and edits a scale indicating the quantitative dimensions. Then, the edited image data of the fundus of the eye to be inspected with the scale is filed in the image storage means, and the image of the fundus with the scale is displayed on the display means. It is characterized in that it has a image processing unit.

According to the present invention, fundus image data of the subject's eye photographed by the fundus camera is collected, and data of the refractive index of the subject's eye measured by the refractometer, data of the corneal diameter of the subject's eye measured by the keratometer, and Utilizing the data of the axial length of the eye to be examined measured by the axial length measuring device, the computing means computes the quantitative dimension of the eye to be examined, and based on the computation result of the computing means, the image processing means And filing the image data of the fundus with the scale according to the quantitative dimensions, and displaying the image of the fundus with the scale on the display means, so that the position of the lesion in the fundus of the eye to be examined having a three-dimensional shape, Quantitative dimensions of the retinal artery, retinal vein, etc. can be accurately determined and filed and imaged. Becomes effective Te.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the image editing means stores the image of the subject's eye stored in the image storage means in accordance with a three-dimensionally distributed fundus of the subject's eye. The data of the refractive index of the subject's eye, the corneal diameter and the axial length of the eye are corrected for the data, and the fundus plane image and the correction scale indicating the quantitative dimension thereof are edited, and the edited fundus plane image is edited. And filing the correction scale data in the image storage means, and displaying the planar image of the fundus and its correction scale on the display means.

According to the present invention, a planar image obtained by correcting a three-dimensionally distributed fundus image of the eye to be examined using data of the refractive index, the corneal diameter, and the axial length of the eye to be examined, and its quantitative dimensions Is displayed and displayed, so that the dimensions of the three-dimensionally distributed fundus of the eye to be examined can be extremely accurately grasped.

[0016]

Embodiments of the present invention will be described below in detail.

The ophthalmologic image processing apparatus 30 of the present embodiment shown in FIG. 1 is an apparatus for collecting an image of the eye E and filing the image of the eye E. And a CPU 31 that controls the entire ophthalmologic image processing apparatus 30 based on the control program.

As shown in FIG. 1, the CPU 31
A fundus camera 5 which is an ophthalmologic image photographing device described in detail later.
1. Refractometer 5 for measuring refractive index of eye E
2. Each data is received from a keratometer 53 for measuring the data of the corneal diameter of the eye E to be measured, and an eye length measuring device 54 for measuring the data of the axial length of the eye E (the distance from the corneal tip to the fovea). , An interface 40 for transferring each data to the CPU 31, and a display unit 38 for displaying an image of the eye E to be inspected.
An image storage unit 36 for storing image data of the fundus of the eye E taken by the fundus camera 51 together with data of the date and time of the photographing; data of the refractive index of the eye E measured by the refractometer 52; A quantitative data storage unit 37 for storing data of physical characteristics and optical characteristics of the measured corneal diameter of the eye E and data of the axial length of the eye measured by the axial length measuring device 54; An arithmetic unit 33 that calculates a quantitative dimension of each part of the fundus of the eye E (for example, a retinal artery or a retinal vein) based on the data of the eye E stored in the quantitative data storage unit 37; Based on the calculation result of the calculation unit 33, the image data of the eye E stored in the image storage unit 36 is read out, and a scale data table 35 storing the scale data is referred to. Then, the image data of the eye E to be inspected is edited by performing editing processing of a scale indicating a quantitative dimension of the image data of the eye E, and the edited image data of the eye E with the scale is filed in the image storage unit 33. An image editing unit 34 as an image processing means for displaying a scaled image on the display unit 38; a keyboard 39 for inputting various data; and an alarm unit 4 for issuing an alarm such as a buzzer sound.
1 is connected.

Further, the image editing unit 34 measures the dimensions of the fundus of the eye E, which is actually arranged in a three-dimensional manner, and the dimensions of the fundus, etc. in a planar image of the eye E photographed by the fundus camera 51. Therefore, a correction process of a display state of a scaled image to be displayed on the display unit 38 is performed using the data of the refractive index, the data of the corneal diameter, and the data of the axial length of the eye E to be examined. It has become.

FIG. 2 shows an example of the configuration of the retinal camera 51.

In FIG. 2, reference numeral 1 denotes an observation light source for illumination composed of a halogen lamp. Light emitted from the observation light source for illumination 1 passes through a relay lens 2 to form an image.
An imaging light source 3 composed of a xenon lamp is provided at this image forming position. A relay lens 4 is arranged in the direction of the optical path from the image forming position. Observation light passing through the relay lens 4 reaches a ring-shaped aperture stop 5,
Is reflected by the reflecting mirror 6, guided to the objective lens 9 by the perforated mirror 8 via the relay lens 7, and radiated to the fundus of the eye E as an annular light flux.

The observation light source 1, the relay lens 2, the photographing light source 3, the relay lens 4, the ring-shaped aperture stop 5, the reflection mirror 6, the relay lens 7, and the perforated mirror 8 are illumination light for observation toward the eye E to be examined. Optical system 1A for irradiating a camera and illumination light for photography
Is composed.

The reflected light reflected by the fundus of the eye E is emitted from the cornea C of the eye E as substantially parallel light, condensed by the objective lens 9 at its focal position, and The light passes through the hole 8a of the mirror 8 and is guided to the imaging lens 11,
The reflected light that has passed through the imaging lens 11 is deflected in the optical path by a quick return mirror 13 provided in the photographing camera 12, and forms an image on the imaging surface 14 as a fundus image. The quick return mirror 13 can be retracted from an optical path of a photographing optical system 1B described later.

The fundus image formed on the image plane 14 can be observed by the observation eye via the eyepiece 16 and the prism 15. In FIG. 1, reference numeral 17 denotes a CCD element which constitutes the photographing camera 12 disposed behind the quick return mirror 13. The CCD element 17 receives reflected light from the eye E to be examined, and an image processing unit 29. The image data of the eye E is obtained by the
Is transmitted to the interface 40.

The objective lens 9, the imaging lens 11, and the quick return mirror 13 constitute an optical system 1B for photographing the image of the eye E. Further, the prism 15 and the eyepiece 16 constitute an observation optical system 1C for observing an image of the eye E to be inspected.

The ring-shaped aperture stop 5 is provided with a reflection member 18 for reflecting light at the central light-shielding portion 5a, and a part of the observation illumination light is transmitted to the side of the ring-shaped aperture stop 5 by the reflection member 18. The light is deflected (reflected), condensed by the condenser lens 19, and enters the light receiving element 20.

The reflection member 18, the condenser lens 19, and the light receiving element 20A constitute an illumination light amount detecting means 2A for detecting a relative amount of the illumination light.

A lens-equipped prism 22 as an optical path deflecting member is disposed between the perforated mirror 8 and the imaging lens 11, and a rotary solenoid 23 is provided so as not to hinder the observation of the eye E at all times. It is driven to retract from the optical path of the imaging optical system 1B in operation. The reflected light deflected by the lens-equipped prism 22 is incident on the light receiving element 20B. A reflected light amount detecting means 2B for detecting the light amount of the reflected light from the eye E is constituted by the lens-equipped prism 22 and the light receiving element 20B.

Next, a control system of the fundus camera will be described.

This fundus camera takes in the respective detection signals of the light receiving element 20A and the light receiving element 20B, obtains an illumination light amount, a reflected light amount, a ratio thereof, and the like, respectively, and sends the light amount to a control unit 25 which performs overall control. An operation unit 24 is provided.

The control unit 25 is connected to a light emission control unit 26 for controlling the light emission of the photographing light source 3 composed of the xenon lamp and a drive unit 27 for driving the rotary solenoid 23.

Further, a photographing switch 28 for issuing a light emission command to the photographing light source 3 is connected to the control unit 25.

Next, the ophthalmologic image processing apparatus 3 having the above configuration
The operation of 0 will be described.

The ophthalmologic image processing apparatus 30 captures, via the interface 40, image data of the fundus of the eye E taken by the fundus camera 51,
The image is stored in the image storage unit 36 under the control of U31. The eye E to be measured measured by the refractometer 52
The data of the refractive index of the eye E, the data of the corneal diameter of the eye E measured by the keratometer 53, and the data of the axial length of the eye E measured by the axial length measuring device 54 are fetched through the interface 40 and controlled by the CPU 31. In the quantitative data storage unit 37.

The calculating unit 33 calculates the quantitative size of the fundus of the eye E based on the refractive index data, the corneal diameter data, and the axial length data of the eye E stored in the quantitative data storage unit 37. The eye to be examined E stored in the image storage unit 36
Of the fundus image data is calculated.

The image editing unit 34 edits, based on the calculation results of the calculation unit 33, the quantitative dimensions of each part of the fundus of the eye E to be examined and the image data of the fundus with a scale corresponding to the photographing magnification of the image data. In addition to filing the image in the image storage unit 36, the image of the scaled fundus is displayed on the screen of the display unit 38.

A display example on the screen of the display unit 38 in this case will be described with reference to FIGS.

The display unit 38 does not edit the fundus image data of the eye E taken by the fundus camera 51 without editing it.
FIG. 3 shows an example in which the image of the fundus of the eye E is displayed on the screen of FIG.
Shown in This fundus image includes images of the fovea 61, the macula 62, the optic disc 63, the retinal artery 64, the retinal vein 65, and the like. In the example shown in FIG. 3, although images of the respective parts of the fundus of the eye E are displayed and the relative positional relationship can be grasped, the quantitative dimensions thereof are not known at all.

In this embodiment, as shown in FIG. 4, an image of the fundus with a scale 70 (100 μm in this case) corresponding to the quantitative dimensions of the eye E and the magnification of the image data is displayed. It is displayed on the screen of the unit 38. This allows
The position of the lesion in the fundus of the eye E to be examined and the retinal artery 6
4. Quantitative dimensions such as the thickness of the retinal vein 65 and the like can be accurately grasped, which is extremely effective for grasping the change over time in the lesion of the eye E and surgery of the eye E. In the example shown in FIG. 5, an image similar to that shown in FIG. 4 is displayed on the screen of the display unit 38 while changing the display magnification, that is, the size of the scale 70.

FIG. 6 shows an example of a screen display on the display unit 38 when the image editing unit 34 performs a correction process on a planar image of the eye E taken by the fundus camera 51. .

In this case, an error occurs between the dimensions of the fundus of the eye E, which is actually a three-dimensional arrangement, and the dimensions of the fundus in the planar image of the eye E taken by the fundus camera 51. Then, the scale 70 displayed on the display unit 38 by the image editing unit 34 using the data of the refractive index, the data of the corneal diameter, and the data of the axial length of the eye E to be examined.
The display processing of the attached image is corrected and displayed as if a three-dimensional figure of the earth is represented by a plane.
In this case, along with the correction graduation 70a corresponding to the dimension subjected to the correction processing on the plane, graduation lines 71 and 72 having vertical and horizontal peripheral portions indicating the size of the fundus oculi, each having a curvature, such as meridians and latitude lines shown on a map. Also displayed.

In this way, the dimensions of each part of the three-dimensionally distributed fundus of the eye E can be determined very accurately according to the three-dimensionally distributed fundus of the eye E.

In the operation of the above-described ophthalmologic image processing apparatus 30, the image data of the fundus of the eye E and the eye E
The CPU 31 has determined based on the control program that any one of the four data including the refractive index data, the corneal diameter data of the eye E to be examined, and the axial length data of the eye E is insufficient. In this case, the image editing process cannot be performed, and the alarm unit 41 may be driven to generate an alarm by a buzzer sound or the like.

Further, the image data of the past date of the specific eye E to be examined, which has been filed once and has been edited in the image storage unit 36, and the image data which has been newly edited and stored in the image storage unit 36 have been stored in the image storage unit 36. The two images corresponding to the new image data of the subject's eye filed in the unit 36 are displayed side by side on the display unit 38, and the two images are compared to quantitatively determine the temporal change of the lesion of the subject's eye E. Can also be grasped.

Further, using a model eye manufactured in advance,
The fundus image data, the refractive index data of the eye E, the corneal diameter data of the eye E, and the axial length data of the eye E are collected in the same manner as described above. An image or the like can be displayed on the display unit 38 to perform a three-dimensional analysis.

[0046]

According to the present invention, it is possible to accurately determine the position of a lesion in a three-dimensional eye to be examined and the quantitative dimensions of each part and to file and image the lesion. It is possible to provide an ophthalmologic image processing apparatus and an ophthalmologic image processing method which are extremely effective for grasping the temporal change of the eye and for surgery on the eye to be examined.

According to the present invention, the position of a lesion in the fundus of the subject's eye can be determined by using the measurement data of a fundus camera, a refractometer, a keratometer, and an axial length measuring device.
Quantitative dimensions of the retinal artery, retinal vein, etc. can be accurately determined and filed by quantitatively determining the quantitative dimensions of each part, and it can be used for grasping changes over time in the lesion of the eye to be examined and surgery of the eye to be examined. An extremely effective ophthalmologic image processing apparatus can be provided.

Further, according to the present invention, it is possible to provide an ophthalmologic image processing apparatus capable of extremely accurately ascertaining the dimensions of each part of the fundus which is three-dimensionally distributed of the subject's eye.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an ophthalmologic image processing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of a fundus camera according to the embodiment of the present invention.

FIG. 3 is a diagram illustrating a display example of a fundus image that is not edited in the ophthalmologic image processing apparatus according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating a display example of a fundus image that has been edited in the ophthalmologic image processing apparatus according to the embodiment of the present invention.

FIG. 5 is a diagram illustrating another display example of the fundus image edited and processed by the ophthalmologic image processing apparatus according to the embodiment of the present invention.

FIG. 6 is a diagram illustrating a display example of a fundus oculi image with a correction scale in the ophthalmologic image processing apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 E Eye to be inspected 30 Ophthalmological image processing apparatus 31 CPU 33 Operation unit 34 Image editing unit 36 Image storage unit 37 Quantitative data storage unit 38 Display unit 41 Alarm unit 51 Fundus camera 52 Refractometer 53 Keratometer 54 Eye axis length measuring machine

Claims (4)

[Claims] 1. An ophthalmologic image processing apparatus for collecting an image of an eye to be examined and filing the image of the eye to be inspected, comprising: display means for displaying an image of the eye to be inspected; Image storage means for storing image data; quantitative data storage means for storing physical and optical quantitative data according to physical characteristics and optical characteristics of the eye to be measured measured by another ophthalmic apparatus; and the quantitative data Computing means for computing quantitative dimensions of the eye to be examined based on physical and optical quantitative data corresponding to the physical and optical characteristics of the eye to be examined stored in the storage means; Based on the calculation result, the image data of the subject's eye stored in the image storage means is read out, and the image data of the subject's eye with a scale indicating its quantitative dimension is filed in the image storage means, Image processing means for displaying an image with a serial memory to the display unit, an ophthalmologic image processing apparatus characterized by having a. 2. Collecting image data of an eye to be inspected photographed by an ophthalmological image photographing apparatus, and collecting physical and optical quantitative data according to physical characteristics and optical characteristics of the eye to be inspected measured by another ophthalmic apparatus. Incorporating and calculating the quantitative dimensions of the eye to be inspected, filing the image data of the eye with the scale according to the calculated quantitative dimensions, and displaying the image of the eye with the scale on the display means An ophthalmologic image processing method. 3. An ophthalmologic image processing apparatus for collecting an image of a subject's eye and filing the image of the subject's eye, a display means for displaying an image of the subject's eye, and a fundus image of the subject's eye taken by a fundus camera. Image storage means for storing data, data of the refractive index of the eye to be measured measured by a refractometer, data of the corneal diameter of the eye to be measured measured by a keratometer, and the axial length of the eye to be measured measured by an axial length measuring machine. A quantitative data storage unit for storing data; and a calculation for calculating a quantitative dimension of the fundus of the eye based on the refractive index, corneal diameter, and axial length data of the eye stored in the quantitative data storage unit Means for reading the image data of the eye to be inspected stored in the image storage means based on the calculation result of the calculation means, and performing an editing process of a scale indicating a quantitative dimension thereof, thereby obtaining the edited eye data. An ophthalmological image processing apparatus, comprising: an image processing unit for filing the image data of the fundus of the eye to be inspected in the image storage unit and displaying the image of the fundus with the scale on the display unit. . 4. The image editing means according to the three-dimensionally distributed fundus of the eye to be examined, the refractive index, the corneal diameter and the refractive index of the eye to be examined with respect to the image data of the eye to be examined stored in the image storage means. Edit the fundus plane image corrected using the data of the axial length and the correction scale indicating the quantitative dimensions thereof, and file the edited fundus plane image and the correction scale data in the image storage means. 4. The ophthalmologic image processing apparatus according to claim 3, wherein the display unit displays the planar image of the fundus and its correction scale.