Rotational Distortion and Compensation in Optical Coherence Tomography with Anisotropic Pixel Resolution.

ABSTRACT: Accurate image registration is essential for eye movement compensation in optical coherence tomography (OCT) and OCT angiography (OCTA). The spatial resolution of an OCT instrument is typically anisotropic, i.e., has different resolutions in the lateral and axial dimensions. When OCT images have anisotropic pixel resolution, residual distortion (RD) and false translation (FT) are always observed after image registration for rotational movement. In this study, RD and FT were quantitively analyzed over different degrees of rotational movement and various lateral and axial pixel resolution ratio (RL/RA) values. The RD and FT provide the evaluation criteria for image registration. The theoretical analysis confirmed that the RD and FT increase significantly with the rotation degree and RL/RA. A

SUBMITTER: Ma G 

PROVIDER: S-EPMC10045376 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature