Ophthalmologic information processing apparatus, ophthalmologic apparatus and ophthalmologic information processing method

Patent metadata

Field	Value
Publication number	US-11439301-B2
Application number	US-201916408483-A
Country	US
Kind code	B2
Filing date	May 10, 2019
Priority date	Jan 16, 2019
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

An ophthalmologic information processing apparatus includes an acquisition unit, a tissue specifying unit, and a specifying unit. The acquisition unit is configured to acquire a tomographic image of a subject's eye. The tissue specifying unit is configured to acquire first shape data representing shape of a tissue of the subject's eye by performing segmentation processing on each of a plurality of tomographic images acquired by the acquisition unit. The specifying unit is configured to obtain second shape data representing shape of the tissue based on the plurality of first shape data acquired by the tissue specifying unit.

First claim

What is claimed is:

1. An ophthalmologic information processing apparatus comprising:
an acquisition unit configured to acquire a tomographic image of a subject's eye:
a tissue specifying unit configured to acquire first shape data representing shape of a tissue of the subject's eye by performing segmentation processing on each of a plurality of tomographic images acquired by the acquisition unit; and
a specifying unit configured to obtain second shape data representing shape of the tissue based on a plurality of first shape data acquired by the tissue specifying unit, wherein
the first shape data includes a shape profile representing a change in shape in a predetermined one-dimensional direction, a predetermined two-dimensional direction, or a predetermined three-dimensional direction.

2. The ophthalmologic information processing apparatus of claim 1 , wherein
the specifying unit obtains the second shape data by performing statistical processing on the plurality of first shape data on which registration has been performed by a registration processor to obtain a statistical value for each scan position of an OCT scan in the plurality of first shape data.

3. The ophthalmologic information processing apparatus of claim 2 , wherein the statistical processing includes a median calculation processing.

4. The ophthalmologic information processing apparatus of claim 2 , wherein the statistical processing includes a mode calculation processing.

5. The ophthalmologic information processing apparatus of claim 2 , wherein the statistical processing includes a maximum likelihood value calculation processing.

6. The ophthalmologic information processing apparatus of claim 1 , wherein
the specifying unit obtains the second shape data based on a maximum likelihood value obtained by performing statistical processing on the plurality of first shape data.

7. The ophthalmologic information processing apparatus of claim 6 , wherein
the statistical processing includes averaging processing.

8. The ophthalmologic information processing apparatus of claim 1 , further comprising
a registration processor that performs registration of the plurality of first shape data acquired by the tissue specifying unit, wherein
the specifying unit obtains the second shape data based on the plurality of first shape data on which registration has been performed by the registration processor.

9. The ophthalmologic information processing apparatus of claim 8 , wherein
the registration processor obtains a shift amount based on a correlation value of the plurality of tomographic images, and performs registration of the plurality of first shape data based on the obtained shift amount.

10. The ophthalmologic information processing apparatus of claim 8 , wherein
the registration processor performs registration of the plurality of first shape data based on constant terms of polynomials obtained by performing polynomial approximation on each of the plurality of first shape data.

11. The ophthalmologic information processing apparatus of claim 8 , wherein
the registration processor extracts each characteristic parts of the plurality of first shape data, and performs registration of the plurality of first shape data with reference to the extracted characteristic parts.

12. The ophthalmologic information processing apparatus of claim 1 , wherein
the tissue includes a predetermined layer region in a fundus.

13. The ophthalmologic information processing apparatus of claim 12 , further comprising
a calculator that calculates a refractive power of a peripheral region of a region including a fovea of the subject's eye based on a refractive power obtained by objectively measuring the subject's eye and parameter representing optical characteristics of the subject's eye corresponding to the shape of the tissue on the basis of the second shape data acquired by the specifying unit.

14. The ophthalmologic information processing apparatus of claim 13 , wherein
the shape of the tissue includes a tilt angle of the tissue with respect to a predetermined reference direction.

15. An ophthalmologic apparatus comprising
the ophthalmologic information processing apparatus of claim 1 , wherein
the acquisition unit includes an OCT unit configured to acquire the tomographic image of the subject's eye by performing optical coherence tomography.

16. The ophthalmologic information processing apparatus of claim 1 , wherein the plurality of shape data have different alignment conditions and scan patterns.

17. The ophthalmologic information processing apparatus of claim 1 , wherein the tomographic image of the subject's eye is acquired by performing an OCT scan.

18. An ophthalmologic information processing apparatus comprising:
an acquisition unit configured to acquire a tomographic image of a subject's eye;
a tissue specifying unit configured to acquire first shape data representing shape of a tissue of the subject's eye by performing segmentation processing on each of a plurality of tomographic images acquired by the acquisition unit;
a specifying unit configured to obtain second shape data representing shape of the tissue based on a plurality of first shape data acquired by the tissue specifying unit;
a registration processor that performs registration of the plurality of tomographic images, wherein
the tissue specifying unit performs segmentation processing on each of the plurality of tomographic images on which registration has been performed by the registration processor, and
the first shape data includes a shape profile representing a change in shape in a predetermined one-dimensional direction, a predetermined two-dimensional direction, or a predetermined three-dimensional direction.

19. The ophthalmologic information processing apparatus of claim 18 , wherein
the registration processor obtains a shift amount based on a correlation value of the plurality of tomographic images, and performs registration of the plurality of tomographic images based on the obtained shift amount.

20. The ophthalmologic information processing apparatus of claim 18 , wherein the tomographic: age of the subject's eye is acquired by performing an OCT scan.

21. The ophthalmologic information processing apparatus of claim 18 , wherein
the specifying unit obtains the second shape data by performing statistical processing on the plurality of first shape data to obtain a statistical value for each scan position of the OCT scan in the plurality of first shape data.

22. An ophthalmologic information processing method comprising:
a tomographic image acquisition step that acquires a tomographic image of a subject's eye;
a tissue specifying step that acquires first shape data representing shape of a tissue of the subject's eye by performing segmentation processing on each of a plurality of tomographic images acquired in the tomographic image acquisition step;
a specifying step that obtains second shape data representing shape of the tissue based on the plurality of first shape data acquired in the tissue specifying step,
wherein the first shape data including a shape profile representing a change in shape in a predetermined one-dimensional direction, a predetermined two-dimensional direction, or a predetermined three-dimensional direction.

23. The ophthalmologic information processing method of claim 22 , wherein
the specifying step obtains the second shape data by performing statistical processing on the plurality of

Assignees

• Topcon Corp

Inventors

• Mino Toshihiro
• Liu Jonathan

Classifications

• G06T7/0012

  Biomedical image inspection · CPC title

• A61B3/103

  for determining refraction, e.g. refractometers, skiascopes · CPC title

• G06T2207/10101

  Optical tomography; Optical coherence tomography [OCT] · CPC title

• A61B3/102 Primary

  for optical coherence tomography [OCT] · CPC title

• G06T7/136

  involving thresholding · CPC title