# US 10,499,806 B2 · OCT motion contrast data analysis apparatus and OCT motion contrast data analysis method

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- Number: US 10,499,806 B2
- Document ID: US10499806B2
- Status: Granted
- Kind: B2
- Application number: 16/452,704
- Filed: 2019-06-26
- Published: 2019-10-17
- Granted: 2019-12-10
- Earliest claimed: 2015-09-04
- Assignees: Nidek Co., Ltd.
- Applicants: Nidek Co., Ltd.
- Inventors: Tetsuya Kano; Ryosuke Shiba; Kazuki Okada
- Web page: https://patentgrep.com/patent/US10499806B2

## CPC

- A61B 3/0091: {Fixation targets for viewing direction}
- A61B 3/102: {for optical coherence tomography [OCT]}
- A61B 3/1025: {for confocal scanning}
- G06T 7/11: Region-based segmentation
- G06T 7/136: involving thresholding
- G06T 2207/10101: Optical tomography; Optical coherence tomography [OCT]
- G06T 2207/20092: Interactive image processing based on input by user
- G06T 2207/30041: Eye; Retina; Ophthalmic
- G06T 2207/30101: Blood vessel; Artery; Vein; Vascular
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

An OCT motion contrast data analysis apparatus includes: a processor; and memory storing computer readable instructions, when executed by the processor, causing the OCT motion contrast data analysis apparatus to execute: acquiring OCT motion contrast data of a subject by an optical coherence tomography; and performing an analysis process with respect to the OCT motion contrast data based on an analysis chart set on image data different from the OCT motion contrast data.

## Claims

### Claim 1

An OCT motion contrast data analysis method of analyzing OCT motion contrast data of a fundus of a subject's eye acquired by an optical coherence tomography, the method comprising the steps of:
setting a first analysis region to OCT data of the fundus of the subject's eye, the first analysis region being divided into a plurality of sections, and the OCT data being image data which is different from the OCT motion contrast data, to acquire basic statistical amounts in relation to a layer thickness of the fundus of the subject's eye in each of the plurality of sections of the first analysis region; and
setting a second analysis region to the OCT motion contrast data of the fundus of the subject's eye, the second analysis region being divided into a plurality of sections, to perform an analysis process with respect to the OCT motion contrast data,
wherein an arranged position and a range of each of the plurality of sections of the second analysis region are identical to an arranged position and a range of each of the plurality of sections of the first analysis region with respect to the OCT data.

### Claim 2 (depends on 1)

The OCT motion contrast data analysis method according to claim 1,
wherein the second analysis region is set to the OCT motion contrast data based on an analysis chart.

### Claim 3 (depends on 2)

The OCT motion contrast data analysis method according to claim 2,
wherein the analysis chart is for measuring basis statistical amounts for measurement results of a fundus of a subject eye in a plurality of sections which are preset.

### Claim 4 (depends on 1)

The OCT motion contrast data analysis method according to claim 1,
wherein an analysis result of the OCT motion contrast data in the second analysis region is displayed on a monitor.

### Claim 5 (depends on 4)

The OCT motion contrast data analysis method according to claim 4,
wherein the basic statistical amounts are displayed on the monitor at a timing different from a timing of the analysis result of the OCT motion contrast data in the second analysis region being displayed.

### Claim 6 (depends on 4)

The OCT motion contrast data analysis method according to claim 4,
wherein the basic statistical amounts and the analysis result of the OCT motion contrast data in the second analysis region are displayed on the monitor at the same time.

### Claim 7 (depends on 1)

The OCT motion contrast data analysis method according to claim 1,
wherein an analysis result of the OCT motion contrast data in the second analysis region is corrected according to an axial length value of a subject eye.

### Claim 8 (depends on 2)

The OCT motion contrast data analysis method according to claim 2,
wherein an analysis result of the OCT motion contrast data in each section of the second analysis region and an analysis result in each section of the analysis chart are associated with each other and evaluated.

### Claim 9 (depends on 1)

The OCT motion contrast data analysis method according to claim 1,
wherein a blood vessel density of the subject eye is measured based on an analysis result acquired by the analysis process.