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13 March 2024 Digital adaptive optics with phase bias correction for bidirectional OCT scanning
Destiny Hsu, Jun Song, Yusi Miao, Shuichi Makita, Yoshiaki Yasuno, Orson Moritz, Marinko V. Sarunic, Myeong Jin Ju
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Proceedings Volume PC12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII; PC128300Q (2024) https://doi.org/10.1117/12.3005590
Event: SPIE BiOS, 2024, San Francisco, California, United States
Abstract
Bidirectional scanning patterns in OCT allow for faster data acquisition with less mechanical strain on scanning components. However, the alternation in scanning direction could lead to phase drift between adjacent B-scans, due to hysteresis of the galvanometer or changes in the incident beam angle, causing errors for digital adaptive optics (DAO) methods. To overcome this limitation, we employed a phase bias estimation method, using bulk phase estimation (BPE) on de-interlaced bidirectional scans to calculate and compensate the systemic phase offset in alternating frames. The corrected scans are then re-interlaced, providing higher-quality DAO correction.
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Destiny Hsu, Jun Song, Yusi Miao, Shuichi Makita, Yoshiaki Yasuno, Orson Moritz, Marinko V. Sarunic, and Myeong Jin Ju "Digital adaptive optics with phase bias correction for bidirectional OCT scanning", Proc. SPIE PC12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII, PC128300Q (13 March 2024); https://doi.org/10.1117/12.3005590
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KEYWORDS
Adaptive optics
Bias correction
Optical coherence tomography
Optical signal processing
Data acquisition
Galvanometers
Retinal scanning
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