Optical coherence tomography device

Patent metadata

Field	Value
Publication number	US-9933246-B2
Application number	US-201414566778-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Dec 13, 2013
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

There is provided an optical coherence tomography device provided with: an OCT optical system configured to output OCT signal; and an analysis processing unit configured to process the OCT signal and generate motion contrast data of the specimen. The analysis processing unit is provided with: a first image data generation unit configured to process multiple OCT signals to generate first image data representing phase difference information of the multiple OCT signals, and a second image data generation unit configured to process the OCT signal to generate second image data representing amplitude information of the OCT signal. The analysis processing unit generates the motion contrast data based on the phase difference information in the first image data and the amplitude information in the second image data.

First claim

What is claimed is:

1. An optical coherence tomography device comprising:
an OCT optical system configured to detect measurement light irradiated onto a specimen and a reference light and output OCT signal based on the measurement light and the reference light; and
an analysis processing unit configured to process the OCT signal and generate functional OCT data of the specimen,
wherein the analysis processing unit comprises:
a first image data generation unit configured to generate first functional OCT image data by applying first analysis processing on the OCT signal; and
a second image data generation unit configured to generate second functional OCT image data by applying second analysis processing that is different from the first analysis processing on the OCT signal, and
wherein the analysis processing unit generates the functional OCT image data based on the first functional OCT image data generated by the first image data generation unit and the second functional OCT image data generated by the second image data generation unit,
wherein the first functional image data is based on a vector difference of a complex OCT signal, and wherein the second functional OCT image data is based on decorrelation of an intensity signal; and
wherein the analysis processing unit applies the second functional OCT image data as a filter onto the first functional OCT image data to remove an artifact at a detected high reflection portion.

2. The optical coherence tomography device according to claim 1 , wherein the analysis processing unit applies to the first functional image data a weight based on the second functional image data.

3. The optical coherence tomography device according to claim 1 , wherein the high reflection portion is a nerve fiber layer (NFL).

Assignees

• Nidek Kk

Inventors

• Takeno Naoki
• Hanebuchi Masaaki
• Furuuchi Yasuhiro
• Namiki Hajime

Classifications

• G01B9/0201

  using temporal phase variation · CPC title

• A61B5/0066

  Optical coherence imaging · CPC title

• A61B5/7203

  for noise prevention, reduction or removal · CPC title

• G06T2207/10101

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

• A61B3/0025

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