Fundus photographing apparatus with wavefront compensation and method for photographing fundus image

Patent metadata

Field	Value
Publication number	US-2016089016-A1
Application number	US-201514869173-A
Country	US
Kind code	A1
Filing date	Sep 29, 2015
Priority date	Sep 30, 2014
Publication date	Mar 31, 2016
Grant date	—

Abstract

A method for photographing a fundus image includes: acquiring photographing condition data on a first captured image being a cell image of a fundus as reference data for follow-up image capture related to the cell image, and storing the photographing condition data; and selecting, based on an operation input from an examiner, reference data for the follow-up image capture from one or more pieces of the reference data stored in advance, and reproducing a photographing condition in accordance with the selected reference data to newly acquire the cell image.

First claim

What is claimed is:

1 . A fundus photographing apparatus with wavefront compensation, comprising:
a fundus imaging optical system that receives a reflected light from fundus of an examinee's eye with a light receiving device to acquire a cell image of the fundus; a wavefront compensating device placed in an optical path of the fundus imaging optical system to compensate for wavefront aberrations of the examinee's eye by controlling a wavefront of the reflected light; and a controller that executes
a photographing step that acquires a first captured image being a captured image of the cell image based on a signal from the light receiving device in a state where the wavefront aberrations are compensated for,
a reference data registration step that acquires photographing condition data on the first captured image as reference data for follow-up image capture and storing the photographing condition data in a storage unit, and
a photographing condition reproduction step that selects, based on an operation input from an examiner, reference data for the follow-up image capture from one or more pieces of the reference data stored in advance in the storage unit in the reference data registration step, and reproducing a photographing condition in accordance with the selected reference data to newly acquire the cell image.

2 . The fundus photographing apparatus with wavefront compensation according to claim 1 , wherein
in the reference data registration step, the controller includes a measurement result of drive information for reproducing a driven state of the wavefront compensating device at a time of acquisition of the first captured image, in the photographing condition data acquired and stored as the reference data, and in the photographing condition reproduction step, the controller reproduces the driven state of the wavefront compensating device.

3 . The fundus photographing apparatus with wavefront compensation according to claim 2 , wherein the controller, in the photographing condition reproduction step, changes the shape of a wavefront compensation region in the wavefront compensating device to reproduce the driven state of the wavefront compensating device.

4 . The fundus photographing apparatus with wavefront compensation according to claim 1 , further comprising:
a correction optical system provided separately from the wavefront compensating device to correct at least one of a defocus component and an astigmatic component among the wavefront aberrations; and a wavefront measuring device that measures the wavefront aberrations of the examinee's eye, wherein the controller controls the wavefront compensating device and the correction optical system based on the wavefront aberrations of the examinee's eye measured by the wavefront measuring device to correct the wavefront aberrations of the examinee's eye, in the reference data registration step, the controller includes information on the amount of aberration correction by the correction optical system of when the first captured image was acquired, in the photographing condition data acquired and stored as the reference data, and in the photographing condition reproduction step, the controller controls the drive of the correction optical system so as to reproduce the aberration correction of the correction optical system of when the first captured image was acquired.

5 . The fundus photographing apparatus with wavefront compensation according to claim 1 , wherein
in the reference data registration step, the controller includes information on a photographing condition on the fundus in the first captured image, in the photographing condition data acquired and stored as the reference data, and in the photographing condition reproduction step, the controller controls the fundus imaging optical system based on the information on the photographing condition to reproduce the photographing condition related to the photographing position.

6 . The fundus photographing apparatus with wavefront compensation according to claim 5 , wherein
the fundus imaging optical system includes an optical scanner for scanning the fundus with light to obtain the reflected light, and the controller controls a scan range of the optical scanner in the photographing condition reproduction step to reproduce the photographing condition related to the photographing position.

7 . The fundus photographing apparatus with wavefront compensation according to claim 5 , wherein
the information on the photographing position on the fundus includes information on a region of interest being part of the first captured image, and in the photographing condition reproduction step, the controller acquires a cell image newly formed based on a signal from the light receiving device, the cell image including the region of interest, as a second captured image by the follow-up image capture.

8 . The fundus photographing apparatus with wavefront compensation according to claim 7 , wherein
upon acquiring the second captured image in the photographing condition reproduction step, the controller controls the fundus imaging optical system so as to place the region of interest at the same position of images between the first and second captured images.

9 . The fundus photographing apparatus with wavefront compensation according to claim 7 , wherein
in the photographing condition reproduction step, the controller determines whether or not the region of interest is included in the newly formed fundus image.

10 . The fundus photographing apparatus with wavefront compensation according to claim 9 , wherein
the controller makes the determination in the photographing condition reproduction step based on a result of pattern matching between the region of interest of the first captured image and the newly formed fundus image.

11 . A method for photographing a fundus image comprising:
acquiring photographing condition data on a first captured image being a cell image of a fundus as reference data for follow-up image capture related to the cell image, and storing the photographing condition data; and selecting, based on an operation input from an examiner, reference data for the follow-up image capture from one or more pieces of the reference data stored in advance, and reproducing a photographing condition in accordance with the selected reference data to newly acquire the cell image.

Assignees

• Nidek Kk

Inventors

• Shibata Naohisa
• Yamazaki Yuji
• Hanebuchi Masaaki
• Yoshihara Yuki

Classifications

• A61B3/0025 Primary

  characterised by electronic signal processing, e.g. eye models · CPC title

• A61B3/12 Primary

  for looking at the eye fundus, e.g. ophthalmoscopes (A61B3/13 takes precedence) · CPC title

• A61B3/1015

  for wavefront analysis · CPC title

• A61B3/14

  Arrangements specially adapted for eye photography · CPC title