We propose a new technique of measuring and analysis of OCT signals: joint Spectral and Time domain Optical Coherence Tomography (STdOCT). This technique is based on a multiple spectral interferogram registration in time increments. The analysis of a single spectral interferogram provides an axial structure of a sample. The analysis of signals registered in time enables velocity estimation of moving sample. The method is applied to biomedical imaging, in particular to in vivo measurements of retinal blood circulation. The velocity estimations obtained with joint STdOCT are compared with the ones obtained by known, phase-resolved OCT. In contrast to the phase-resolved technique, STdOCT correctly reproduces parabolic shape of the flow velocity distribution despite decreasing signal-to-noise ratio (SNR).

Date Published: 11 February 2008
PDF: 8 pages
Proc. SPIE 6844, Ophthalmic Technologies XVIII, 68440K (11 February 2008); doi: 10.1117/12.762725

Published in SPIE Proceedings Vol. 6844:
Ophthalmic Technologies XVIII
Bruce E. Stuck; Fabrice Manns; Per G. Söderberg; Michael Belkin M.D.; Arthur Ho, Editor(s)