Correction of geometric and refractive image distortions in optical coherence tomography applying Fermat�??s principle

• DOI: 10.1364/oe.10.000397
• Publication Date: 2012-10-22T14:34:11Z
• Authors: Volker Westphal; Andrew Rollins; Sunita Radhakrishnan; Joseph Izatt
• Keywords: 03 medical and health sciences; 0302 clinical medicine

We describe a methodology for quantitative image correction in OCT which includes procedures for correction of nonlinear axial scanning and non-telecentric scan patterns, as well as a novel approach for refraction correction in layered media based on Fermat's principle. The residual spatial error obtained in layered media with a fan-beam hand-held probe was reduced from several hundred micrometers to near the diffraction and coherence-length limits.