JP3805232B2 - Ophthalmic equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ophthalmologic apparatus used in an ophthalmic clinic or a mass examination.
[0002]
[Prior art]
Conventionally, as an ophthalmologic apparatus, for example, a fundus camera for photographing the fundus of an eye to be examined is known. Due to recent advances in digital technology, fundus cameras are also storing electronic images on magneto-optical disks and the like, which are photographed by connecting a CCD camera. These electronic images are stored in a database together with the patient name, imaging date, imaging location, etc., and can be quickly retrieved even after imaging. In addition, since the patient name may be the same name, the patient ID is generally used for each patient when creating a database.
[0003]
By managing the imaging data using the patient ID in this manner, it is possible to smoothly perform from imaging to storage / viewing. Furthermore, since it is easy to manage the history of a patient who has once taken an image, it is effective for, for example, finding a disease or observing a follow-up.
[0004]
However, in the above-described method, since the same patient is identified by the patient ID, if the patient ID is saved by mistake when saving the image from the fundus camera, the history management of the image is performed. There is a problem that it cannot be done correctly. In order to prevent such a patient ID from being mistaken, an apparatus using an ID card is known as disclosed in, for example, Japanese Patent Laid-Open No. 2001-300516.
[0005]
[Problems to be solved by the invention]
However, in order to use an ID card, an ID card reading / writing device is also required, which increases the size of the device. In addition, the method of duplicating patient ID input is complicated.
[0006]
In addition, in the method of allowing an image stored in error to be changed to another patient, it is not possible to determine which other patient the stored image belongs to.
[0007]
An object of the present invention is to provide an ophthalmic apparatus capable of solving the above-mentioned problems and preventing erroneous registration of a patient ID when storing a test result.
[0008]
[Means for Solving the Problems]
To achieve the above object, an ophthalmologic apparatus according to the present invention includes an apparatus state detection unit that detects an apparatus state at the end of an examination, a data recording unit that stores an examination result of an eye to be examined together with patient identification information and the apparatus state, Determining means for determining whether or not the first apparatus state at the end of the previous examination stored according to the patient identification information is stored in the data recording unit; and the first apparatus state is recorded by the determining means. And comparing means for comparing the first apparatus state with the second apparatus state at the end of the inspection when it is determined that the first apparatus state is present.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail based on the illustrated embodiment.
FIG. 1 shows a block diagram of a fundus camera in the present embodiment. An objective lens 1 is disposed in front of the eye E, and an imaging means 5 comprising a perforated mirror 2, a photographing lens 3 movable for focusing, a movable mirror 4, a television camera, and the like on the optical path behind the objective lens 1. Are sequentially arranged. Further, in the incident direction of the illumination light to the perforated mirror 2, a lens 6, a diaphragm 7 having a ring opening, a strobe light source 8 that emits a visible light flash, a visible light cut filter 9, a condenser lens 10, a halogen lamp, and the like The observation light sources 11 that emit visible light are sequentially arranged.
[0010]
A half mirror 12 is disposed in the reflection direction of the movable mirror 4, a relay lens 13 and a television camera 14 having sensitivity in the infrared wavelength region are disposed in the reflection direction of the half mirror 12, and the output of the television camera 14 is a television. Connect to the monitor 15. Further, a fixation lamp 16 is arranged in a conjugate manner with the fundus Er of the eye E in the transmission direction of the half mirror 12, and a fixation target is presented to the eye E. The fixation lamp 16 is connected to the output of the system control unit 17, and the position of the eye E is fixed by the control of the system control unit 17.
[0011]
The output of the imaging means 5 is connected to the A / D converter 18, the output of the A / D converter 18 is connected to the frame memory 19, and the output of the frame memory 19 is connected to the display memory 20. The output of the display memory 20 is connected to the television monitor 22 via the D / A converter 21.
[0012]
Further, the system control unit 17 includes an A / D conversion unit 18, a frame memory 19, a display memory 20, a D / A conversion unit 21, a storage medium 23, an information input unit 24, a left / right eye detection switch 25, and a photographic lens 3. The focus position detection unit 26 and the chin support position detection unit 27 that detect the position are connected. A control line for controlling the fundus camera such as control of the movable mirror 4 and the strobe light source 8 is connected to the system control unit 17, but the illustration is omitted.
[0013]
When photographing, first, the photographer inputs a patient ID before photographing. When the patient ID is not registered, the patient information such as the patient's name, date of birth, sex, and the like and the file format for outputting the captured image are input to the system control unit 17 via the information input unit 24. If the patient ID has already been registered and the patient information such as name, date of birth, gender, etc., and the file format when outputting the captured image are the same as the previous one, input from the information input means 24 is not necessary. is there.
[0014]
Next, the photographer seats the patient in front of the fundus camera, places the eye E in front of the objective lens 1 and performs alignment for fundus photography. When the observation light source 11 is turned on, the luminous flux is collected by the condenser lens 10, the visible light is removed by the visible light cut filter 9, and the observation light that is only infrared light passes through the strobe light source 8, the diaphragm 7, and the lens 6. The light is reflected leftward by the peripheral part of the perforated mirror 2, passes through the objective lens 1, and illuminates the fundus Er via the anterior eye part Ep of the eye E to be examined.
[0015]
The fundus image illuminated by the observation light passes through the photographing lens 3 again through the holes of the objective lens 1 and the perforated mirror 2, is reflected upward by the movable mirror 4, and further reflected leftward by the half mirror 12. Then, an image is formed on the television camera 14 via the relay lens 13. The television camera 14 having sensitivity to infrared light converts the received fundus image into a television signal and outputs the television signal to the television monitor 15.
[0016]
While observing the fundus image presented on the TV monitor 15, the photographer performs precise alignment, focusing, and confirmation of the photographing range between the eye E and the fundus camera, and the position, focus, and photographing range are good. After confirming this, still image shooting is performed by operating a shooting switch (not shown). The system control unit 17 that has detected the input of the photographing switch causes the movable mirror 4 to jump up and out of the optical path, and emits the strobe light source 8. Similar to the observation light, the light beam emitted from the strobe light source 8 passes through the ring-shaped opening of the diaphragm 7, passes through the lens 6, is reflected to the left by the peripheral portion of the perforated mirror 2, and passes through the objective lens 1. Illuminate E fundus Er. The fundus image illuminated in this way passes through the holes of the objective lens 1 and the perforated mirror 2 again, passes through the photographing lens 3, and forms an image on the imaging surface of the imaging means 5.
[0017]
The system control unit 17 synchronizes the TV signal output from the image pickup means 5 with the strobe light emission, converts it to digital data by the A / D conversion unit 18, and then displays the display memory 20 via the frame memory 19 and further the D / A. The conversion unit 21 converts it into analog data and displays a color image on the television monitor 22.
[0018]
FIG. 2 is a flowchart showing an imaging procedure. First, after inputting the patient ID in step S1, the imaging is performed in step S2, and then the fundus image is stored in the frame memory 19 in step S3. In step S4, it is selected whether or not the image is to be stored. If the image is to be stored, the process proceeds to step S5. If the image is not to be stored, shooting is terminated.
[0019]
In step S5, it is determined whether or not there is an image that has been captured with the same patient ID before. If an image exists, the process proceeds to step S6. If no image exists, the process proceeds to step S8. In step S6, it is determined whether or not the patient ID is correct. If it is determined that the patient ID is not correct, the process proceeds to step S7. If it is determined that the patient ID is correct, the process proceeds to step S8.
[0020]
In step S7, a patient ID is input. When the patient ID is input, the process proceeds to step S8. When the patient ID is not input, the imaging is terminated. In step S8, data is stored in the storage medium 23, and in step S9, data is converted in the D / A converter 21 and displayed on the television monitor 22.
[0021]
Also, when the second patient is photographed after the first patient is photographed, the case where the patient ID is forgotten and the image is saved is compared with the conventional example. Whether or not to save the image is determined by the process of step S4 without performing the processes of steps S5 to S7 in the embodiment. For this reason, the image of the second patient is stored in the first patient, and the image is not stored in the second patient.
[0022]
However, in the present embodiment, when saving is selected in the process of step S4, it is determined whether or not the patient ID is correct when the previous captured image exists in the process of step S5. It has become. Accordingly, when the second patient is photographed and saved by the process of step S4, the input of the patient ID is requested by the process of step S7. Here, the photographer can check whether or not the patient ID is correct, and can input the correct patient ID of the second patient and store the image.
[0023]
Furthermore, if the configuration is such that the input of the patient ID is always requested after the process of step S4, the operation of inputting the patient ID becomes complicated because it is necessary to perform this operation even when the patient ID is correct.
[0024]
In the method according to the present embodiment, when the patient ID is correct, the process of step S6 immediately moves to the process of step S8, so that the input of the patient ID is not requested. For this reason, the patient ID needs to be input only once, and the patient ID input operation does not become complicated.
[0025]
If the patient ID is not correct, the input of the patient ID is requested. If the patient ID is correct, the patient ID is promptly stored. Whether or not the image is stored by the process of step S4 as in the conventional example. Compared with the method of determining the patient ID and the method of always requesting the input of the patient ID after the process of step S4, smooth imaging can be performed without making a mistake in the patient ID.
[0026]
Next, a method for determining whether or not the patient ID is correct in the process of step S6 will be described. This is a method that utilizes the fact that the refraction value, the size of the face, the position of the eyeball, and the like differ for each eye E of the patient. That is, if the refraction value, face size, eyeball position, and the like are different for each patient, the state of the apparatus such as the focus position and the chin rest position when performing alignment is different. Conversely, if the patient is the same, these positions are almost the same.
[0027]
In the present embodiment, the apparatus automatically determines the focus position and chin rest position of the photographic lens 3 by the focus position detector 26 that detects the position of the photographic lens 3 and the chin rest position detector 27 that detects the chin rest position. Can be detected automatically. Furthermore, it is possible to detect the eye to be photographed by the left and right eye detection switch 25, and the state at the time of photographing can be stored for each patient ID and eye to be examined. Therefore, it is possible to compare the focus position and the chin rest position at the previous photographing with the focus position and the chin rest position at the current photographing, respectively.
[0028]
FIG. 3 is a flowchart of the patient ID correctness determination process in step S6. First, in step S11, after reading the focus position at the time of previous photographing, the focus position at the time of current photographing is read in step S12. Subsequently, in step S13, a difference between the focus position at the previous shooting and the focus position at the current shooting is obtained, and it is determined whether or not it falls within a predetermined range. If it is within the predetermined range, that is, if the focus position is the same, the process proceeds to step S14. If it is not within the predetermined range, that is, if the focus position is different, it is determined that the patient ID is not correct.
[0029]
In step S14, the chin rest position at the time of previous photographing is read. In step S15, the chin rest position at the time of current photographing is read. Subsequently, in step S16, the difference between the chin rest position at the previous photographing and the chin rest position at the current photographing is obtained, and it is determined whether or not it falls within a predetermined range. When it falls within the predetermined range, it is determined that the patient ID is correct, and when it does not fall within the predetermined range, it is determined that the patient ID is not correct.
[0030]
FIG. 4 is an explanatory diagram of a database of patient IDs, and the storage medium 23 records ID: patient ID, R / L: left and right eyes, A: focus position value, and B: jaw support position value. When the patient ID is ID1 and the measurement eye is R (right eye), the value of the focus position is 50 and the value of the chin rest position is 50.
[0031]
In the present embodiment, the value of the focus position detection unit 26 changes from 0 to 100, and the value of the chin rest position detection unit 27 changes from 0 to 100. In addition, the predetermined range in the process of step S3 is within ± 5%, and the predetermined range in the process of step S6 is ± 10%.
[0032]
For example, in the case of the specific example of FIG. 5, since the focus position value 50 at the time of the previous photographing is read at step S11, and the focus position value 48 at the time of the current photographing is read at step S12, 50 at step S13. −48 = 2, which falls within the predetermined range, and the process proceeds to step S14. Further, in step S14, the value 50 of the jaw support position at the time of the previous photographing is read, and in step S15, the value 54 of the jaw support position at the time of the current photographing is read, so in step S16, 50−54 = −4. Therefore, it is determined that the patient ID is correct.
[0033]
In the case of the specific example of FIG. 6, since the focus position value 50 at the time of the previous photographing is read at step S11, and the focus position value 40 at the time of the current photographing is read at step S12, 50 at step S13. Since −40 = 10 and it does not fall within the predetermined range, it is determined that the patient ID is not correct.
[0034]
In this way, in the process of step S16, the state of the device at the time of the previous photographing is compared with the current state, and if the state of the previous and current device is different, it is determined that the patient ID is incorrect, and the state of the device is determined. Are substantially the same, it is determined that the patient ID is correct.
[0035]
Here, the predetermined range in the process of step S13 is within ± 5%, and the predetermined range in the process of step S16 is ± 10%, but these values can be varied depending on the accuracy inherent in the apparatus.
[0036]
In the present embodiment, the focus position and the chin rest position are the conditions for confirming the patient ID. In addition to this, the position of the stage movable part, the position of the vertical movement adjustment knob, and the distance between the working dots that are alignment targets It is possible to use a parameter that changes in relation to the alignment as a parameter.
[0037]
Further, a method of performing steps S5 to S7 in FIG. 2 before step S4 is also conceivable so that it can be determined whether or not the patient ID is correct immediately after imaging.
[0038]
In the present embodiment, a fundus camera is illustrated as an ophthalmologic apparatus, but the present invention is not limited to a fundus camera, and the same applies to other ophthalmologic apparatuses such as a blood flow meter and a perimeter. It is possible to obtain the same effect by applying to the above.
[0039]
【The invention's effect】
As described above, when the ophthalmologic apparatus according to the present invention saves the test result, when the state of the apparatus is different as a result of comparing the state of the apparatus at the time of previous inspection with the state of the current apparatus, Since it is determined that the patient ID is wrong and the patient ID can be input again, erroneous registration of the patient ID can be prevented.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a fundus camera.
FIG. 2 is a flowchart showing a photographing procedure.
FIG. 3 is a flowchart for determining whether a patient ID is correct or not.
FIG. 4 shows a schematic diagram of a database of patient IDs.
FIG. 5 shows a specific example.
FIG. 6 shows a specific example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Objective lens 5 Imaging means 14 Television camera 15, 22 Television monitor 17 System control part 18 A / D conversion part 19 Frame memory 20 Display memory 21 D / A conversion part 23 Storage medium 26 Focus position detection part 27 Claw position detection Part

Claims (12)

Device state detecting means for detecting the device state at the end of the examination, a data recording unit for storing the examination result of the eye to be examined together with the patient identification information and the device state, and at the end of the previous examination saved according to the patient identification information Determining means for determining whether or not the first apparatus state is stored in the data recording unit; and when the determining means determines that the first apparatus state is recorded, the first apparatus state An ophthalmologic apparatus comprising: a comparison unit that compares the second apparatus state at the end of the examination. An input means for inputting patient identification information, and a control means for controlling whether or not to input the patient identification information via the input means in accordance with a comparison result of the comparison means. The ophthalmic apparatus according to claim 1. The control means does not input the patient identification information when the difference between the first device state and the second device state is within a certain range, and when the difference is larger than the certain range. The ophthalmologic apparatus according to claim 2, wherein control is performed so as to input the patient identification information.   The ophthalmologic apparatus according to any one of claims 1 to 3, wherein the comparison unit performs comparison when the test result is stored.   The ophthalmologic apparatus according to claim 1, wherein the comparison unit performs comparison at the end of the examination.   The ophthalmic apparatus according to claim 1, wherein the patient identification information is a patient ID or a patient name. A right and left eye detection switch, wherein the apparatus state detection unit detects an imaging target eye of the eye to be examined, and the comparison unit is an imaging target eye of the eye to be examined at the end of the previous examination and an imaging subject of the eye to be examined at the end of the examination The ophthalmologic apparatus according to claim 1, wherein the ophthalmologic apparatus is compared with an eye. A chin rest, wherein the device state detecting means detects the position of the chin rest, and the comparing means compares the position of the chin rest at the end of the previous examination with the position of the chin rest at the end of the examination; The ophthalmologic apparatus according to any one of claims 1 to 6, wherein A photographing lens, wherein the apparatus state detecting means detects a focus position of the photographing lens, and the comparing means compares the focus position at the end of the previous inspection with the focus position at the end of the inspection. The ophthalmologic apparatus according to any one of claims 1 to 6. A stage movable portion, the device state detection unit detects the position of the stage movable portion, said comparing means and the position of the stage movable portion of the test at the end and the position of the stage movable portion of the previous inspection end comparing the ophthalmologic apparatus according to any one of claims 1 to 6, wherein. Comprising a vertical movement adjustment knob, said device state detection means detects the position of the vertical movement adjustment knob, and the position of the vertical movement adjusting knob when the comparison means last inspection end, the upper and lower at the end of examination The ophthalmologic apparatus according to claim 1, wherein the position of the dynamic adjustment knob is compared . The apparatus state detecting means detects a distance between working dots that are alignment targets, and the comparing means is a distance between the working dots at the end of the previous inspection and a distance between the working dots at the end of the inspection. comparing the ophthalmologic apparatus according to any one of claims 1 to 6, wherein.

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