Angular compounding by full-channel B-scan modulation encoding for optical coherence tomography speckle reduction

被引：12

作者：

Li, Pei ^{[1
]}

Zhou, Liping ^{[1
]}

Ni, Yang ^{[1
]}

Ding, Zhihua ^{[1
]}

Li, Peng ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF BIOMEDICAL OPTICS | 2016年 / 21卷 / 08期

基金：

中国国家自然科学基金;

关键词：

optical coherence tomography; medical and biological imaging; speckle reduction; angular compounding; AMPLITUDE-DECORRELATION ANGIOGRAPHY; SPECTRUM;

D O I：

10.1117/1.JBO.21.8.086014

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We describe an angular compounding method by full-channel B-scan modulation encoding for speckle reduction in optical coherence tomography. The complex-valued spectral interferogram (SI) is reconstructed by removing one of the conjugate terms in the depth space. Fourier transform of the complex SI along the lateral direction enables a full-channel (with both negative and positive Fourier space) for B-scan modulation in the spatial frequency (v) domain. A full-size probe beam, determined by the scanning mirror size, is centered on the mirror pivot, which allows the negative and positive half-channels working in parallel. Compared with the existing method, where only a half-channel (negative or positive) works alone, the proposed full-channel method offers more than twice the performance in speckle reduction. The feasibility of the proposed full-space approach is validated through both the phantom and in vivo human thumbnail experiments. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：6

共 19 条

[1] Speckle reduction in optical coherence tomography images by use of a spatially adaptive wavelet filter [J].