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We have developed a novel scanning protocol based on Spectrally Extended Line Field OCTA (SELF-OCTA) to realize 4 interscan times ranging from 0.54 ms to 5.4 ms without increasing A-scan repetitions at the same position. Based on the linear model, we further developed signal processing methods to realize high dynamic range blood flow map by concatenating the dynamic range of 3 interscan time: 0.54 ms, 1.35 ms and 2.70 ms. The differential OCTA signals provided by different interscan times help with flow dynamic range extension and blood flow evaluation.
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Si Chen, Chen Hsin Sun, Xin Ge, Xi Chen, Shiliang Lou, Kan Lin, Yukun Wang, Linbo Liu, "High dynamic range blood flow evaluation in the retina with spectrally extended line field OCTA," Proc. SPIE PC12360, Ophthalmic Technologies XXXIII, PC1236004 (17 March 2023); https://doi.org/10.1117/12.2649617