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Updated: Mar 17, 2026
Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
Published on: August 4, 2018
Automated motion correction using parallel-strip registration for wide-field en face OCT angiogram
Pengxiao Zang1, Gangjun Liu2, Miao Zhang2
1Casey Eye Institute, Oregon Health & Science University, Portland, OR 97239, USA; Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, Institute of Biomedical, Sciences, School of Physics and Electronics, Shandong Normal University, Jinan, 250014, China.
Abstract:
We propose an innovative registration method to correct motion artifacts for wide-field optical coherence tomography angiography (OCTA) acquired by ultrahigh-speed swept-source OCT (>200 kHz A-scan rate). Considering that the number of A-scans along the fast axis is much higher than the number of positions along slow axis in the wide-field OCTA scan, a non-orthogonal scheme is introduced. Two en face angiograms in the vertical priority (2 y-fast) are divided into microsaccade-free parallel strips. A gross registration based on large vessels and a fine registration based on small vessels are sequentially applied to register parallel strips into a composite image. This technique is extended to automatically montage individual registered, motion-free angiograms into an ultrawide-field view.
