Quantitative measurement using panretinal optical coherence tomography with three-dimensional curve distortion correction

Panretinal optical coherence tomography (PanOCT) enables rapid, widefield retinal imaging up to 140°, visualizing peripheral regions including the ora serrata. However, raw B-scan images exhibit curvature distortion, limiting quantitative accuracy. We present a curve correction method to restore geometric fidelity. Validation with a custom 3D-printed eye phantom showed average relative errors under 1%. Clinical comparisons with CT and ultrasound demonstrated errors of 2.78% and 5.97%, respectively. These results indicate strong agreement with standard imaging modalities and support the utility of PanOCT for accurate widefield retinal measurements in clinical and research applications.