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Journal of Biomedical Optics

Angular compounding by full-channel B-scan modulation encoding for optical coherence tomography speckle reduction
Author(s): Pei Li; Liping Zhou; Yang Ni; Zhihua Ding; Peng Li
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Paper Abstract

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 (ν) 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.

Paper Details

Date Published: 24 August 2016
PDF: 6 pages
J. Biomed. Opt. 21(8) 086014 doi: 10.1117/1.JBO.21.8.086014
Published in: Journal of Biomedical Optics Volume 21, Issue 8
Show Author Affiliations
Pei Li, Zhejiang Univ. (China)
Liping Zhou, Zhejiang Univ. (China)
Yang Ni, Zhejiang Univ. (China)
Zhihua Ding, Zhejiang Univ. (China)
Peng Li, Zhejiang Univ. (China)

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