Author： Guo Li Li Pei Pan Cong Liao Rujia Cheng Yuxuan Hu Weiwei Chen Zhong Ding Zhihua Li Peng
Publisher： IOP Publishing
E-ISSN： 2040-8986|18|2|25301-25311
ISSN： 2040-8986
Source： Journal of Optics, Vol.18, Iss.2, 2016-02, pp. : 25301-25311
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Abstract
The complex-based OCT angiography (Angio-OCT) offers high motion contrast by combining both the intensity and phase information. However, due to involuntary bulk tissue motions, complex-valued OCT raw data are processed sequentially with different algorithms for correcting bulk image shifts (BISs), compensating global phase fluctuations (GPFs) and extracting flow signals. Such a complicated procedure results in massive computational load. To mitigate such a problem, in this work, we present an inter-frame complex-correlation (CC) algorithm. The CC algorithm is suitable for parallel processing of both flow signal extraction and BIS correction, and it does not need GPF compensation. This method provides high processing efficiency and shows superiority in motion contrast. The feasibility and performance of the proposed CC algorithm is demonstrated using both flow phantom and live animal experiments.
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