Ophthalmic apparatus

Patent metadata

Field	Value
Publication number	US-10022047-B2
Application number	US-201615253260-A
Country	US
Kind code	B2
Filing date	Aug 31, 2016
Priority date	Sep 4, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

An ophthalmic apparatus includes a deforming unit and a generation unit. The deforming unit deforms a shape of a boundary that defines a region of a tomographic image of a subject eye in a depth direction according to a thickness of a layer in which the boundary is positioned. The generation unit generates an en-face image based on the region in the depth direction defined by the shape of the boundary deformed by the deforming unit.

First claim

What is claimed is:

1. An ophthalmic apparatus comprising:
a deforming unit configured to deform a shape of a boundary that defines a region of a tomographic image of a subject eye by moving the boundary in a depth direction according to layer thickness;
a generation unit configured to generate an en-face image based on the region in the depth direction defined by the shape of the boundary deformed by the deforming unit; and
a display control unit configured to control a display unit to display the tomographic image and the boundary,
wherein the deforming unit increases an amount of movement of the boundary displayed on the display unit as the layer thickness increases.

2. The ophthalmic apparatus according to claim 1 , further comprising a receiving unit configured to receive an instruction to move the boundary in the depth direction,
wherein the deforming unit deforms the shape of the boundary when the receiving unit receives the instruction.

3. The ophthalmic apparatus according to claim 2 , wherein the display control unit is further configured to cause the display unit to display names of a plurality of layers in the subject eye in an order of depth and to display a slider, the slider being movable in a direction in which the names of the plurality of layers are arranged, in an area parallel to an area in which the names of the plurality of layers are arranged,
wherein the receiving unit receives an instruction to move the boundary in the depth direction via the slider.

4. The ophthalmic apparatus according to claim 1 , wherein the boundary is a layer boundary of a fundus of the subject eye.

5. The ophthalmic apparatus according to claim 1 , wherein the display control unit controls the display unit to display the tomographic image and the boundary so that the boundary is superimposed on the tomographic image.

6. An ophthalmic apparatus comprising:
a deforming unit configured to deform a boundary that defines a region of a tomographic image of a subject eye by moving the boundary in a depth direction according to a layer thickness;
a receiving unit configured to receive an instruction to move the boundary in a depth direction;
a generation unit configured to generate an en-face image based on the region in the depth direction defined by the boundary; and
a display control unit configured to cause a display unit to display names of a plurality of layers in the subject eye in an order of depth and to display a slider, the slider being movable in a direction in which the names of the plurality of layers are arranged, in an area parallel to an area in which the names of the plurality of layers are arranged,
wherein the receiving unit receives an instruction to move the boundary in the depth direction via the slider.

7. The ophthalmic apparatus according to claim 6 , wherein the slider comprises a first slider for determining a position of an upper end of a region in the depth direction and a second slider for determining a position of a lower end of the region in the depth direction.

8. The ophthalmic apparatus according to claim 6 , wherein the slider is displayed in an area on the display unit, the area being adjacent to the area in which the names of the plurality of layers are arranged.

9. The ophthalmic apparatus according to claim 6 , wherein the display control unit causes the display unit to display a plurality of lines that segment the area in which the names of the plurality of layers are displayed for the individual names of the layers,
wherein, when the slider is aligned with any one of the plurality of lines, the generation unit generates the en-face image based on a layer boundary corresponding to the selected line indicating the name of the layer.

10. The ophthalmic apparatus according to claim 9 , wherein the plurality of lines are equally spaced.

11. The ophthalmic apparatus according to claim 6 , wherein the boundary is a layer boundary of a fundus of the subject eye.

12. The ophthalmic apparatus according to claim 6 , wherein the deforming unit increases an amount of movement of the boundary displayed on the display unit in response to a user input as the layer thickness increases.

13. A method of generating an en-face image with an ophthalmic apparatus, comprising:
deforming a shape of a boundary that defines a region of a tomographic image of a subject eye by moving the boundary in a depth direction according to a layer thickness;
generating an en-face image based on the region in the depth direction defined by the shape of the boundary deformed by the deforming; and
displaying the tomographic image and the boundary on a display unit,
wherein the deforming increases an amount of movement of the boundary displayed on the display unit as the layer thickness increases.

14. A non-transitory computer-readable medium storing a program which when executed by a processor causes the processor to perform a method of generating an en-face image, comprising:
deforming a shape of a boundary that defines a region of a tomographic image of a subject eye by moving the boundary in a depth direction according to a layer thickness;
generating an en-face image based on the region in the depth direction defined by the shape of the boundary deformed by the deforming; and
displaying the tomographic image and the boundary on a display unit,
wherein the deforming increases an amount of movement of the boundary displayed on the display unit as the layer thickness increases.

Assignees

• Canon Kk

Inventors

• Yamashita Yutaka

Classifications

• A61B3/10

  Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions · CPC title

• A61B3/102 Primary

  for optical coherence tomography [OCT] · CPC title

• A61B3/0025

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

• A61B3/14

  Arrangements specially adapted for eye photography · CPC title

• A61B3/0058

  for multiple images · CPC title