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.

A cross‐scanning optical coherence tomography (CS‐OCT) system is newly developed to correct eye motion artifacts in OCT angiography images. The CS‐OCT provides two retinal angiograms scanned simultaneously in a perpendicular direction to each other over the same area. Since the eye motion is decomposed into the two retinal angiograms, the motioncorrected retinal angiogram can be obtained by compensating between the two. Further details can be found in the article by Hyung‐Jin Kim, Byeong Joo Song, Youngwoon Choi, and Beop‐Min Kim (https://onlinelibrary.wiley.com/doi/10.1002/jbio.202000170).

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