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12 March 2019 Periodic bulk motion correction method in decorrelation-based optical coherence tomography angiography
Jinyu Fan, Jingxuan Liu, Quan Wang, Wen Kong, Feng Gao, Yule Xia, Guohua Shi
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Proceedings Volume 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application; 1102344 (2019) https://doi.org/10.1117/12.2520585
Event: Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 2018, Xi'an, China
Abstract
Decorrelation-based OCTA is a widely used optical coherence tomography angiography method which utilizes OCT intensity information. However, cardiac and respiratory motions in animals are seriously degrade image quality. These kind of bulk motion is periodic, and its C-Scan (slow scan) direction component hinder motion correction because of scan position and OCT structure’s change. Some correction methods were proposed, but vasculature information will be lost when larger bulk motion occur. Here we demonstrate a correction method which uses stitch scan protocol in C-Scan direction, and sets a threshold to the maximum value of normalized cross-correlation among repeated B-Scan intensity signal to exclude false OCT B-scans. Result of In vivo imaging experiment for mice indicates that our method can reserve whole vasculature information and effectively improve image quality.
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Jinyu Fan, Jingxuan Liu, Quan Wang, Wen Kong, Feng Gao, Yule Xia, and Guohua Shi "Periodic bulk motion correction method in decorrelation-based optical coherence tomography angiography", Proc. SPIE 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 1102344 (12 March 2019); https://doi.org/10.1117/12.2520585
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KEYWORDS
Optical coherence tomography
Angiography
Image quality
Signal processing
In vivo imaging
Motion estimation
Scanners
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