We propose a cross-scanning optical coherence tomography (CS-OCT) system to correct eye motion artifacts in OCT angiography images. This system employs a dual-illumination configuration with two orthogonally polarized beams, each of which simultaneously perform raster scanning in perpendicular direction with each other over the same area. In the reference arm, a polarization delay unit is used to acquire the two orthogonally polarized interferograms with a single photo detector by introducing different optical delay lines. The two cross-scanned volume data are affected by the same eye motion but in two orthogonal directions. We developed a motion correction algorithm, which removes artifacts in the slow axis of each angiogram using the other and merges them through a nonrigid registration algorithm. In this manner, we obtained a motion-corrected angiogram within a single volume scanning time without additional eye-tracking devices.
Bibliographical noteFunding Information:
This study was funded by the Ministry of Trade, Industry, and Energy (MOTIE) (10063364) and the National Research Foundation of Korea (NRF) (2015M3C7A1029034).
Ministry of Trade, Industry and Energy, Grant/Award Number: 10063364; National Research Foundation of Korea, Grant/Award Number: 2015M3C7A1029034 Funding information
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
- motion correction
- motion-corrected angiogram
- optical coherence tomography
- optical coherence tomography angiography
ASJC Scopus subject areas
- Materials Science(all)
- Biochemistry, Genetics and Molecular Biology(all)
- Physics and Astronomy(all)