Doppler velocity detection limitations in spectrometer and swept-source Fourier-domain optical coherence tomography

Hansford C. Hendargo; Ryan P. McNabb; Al-Hafeez Dhalla; Neal Shepherd; Joseph A. Izatt

doi:10.1117/12.876013

15 February 2011 Doppler velocity detection limitations in spectrometer and swept-source Fourier-domain optical coherence tomography

Hansford C. Hendargo, Ryan P. McNabb, Al-Hafeez Dhalla, Neal Shepherd, Joseph A. Izatt

Author Affiliations +

Proceedings Volume 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV; 788911 (2011) https://doi.org/10.1117/12.876013
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

Recent advances in Doppler and variance techniques have enabled high sensitivity imaging in regions of biological flow to measure blood velocities and vascular perfusion. In recent years, the sensitivity and imaging speed benefits of Fourier domain OCT have become apparent. Spectrometer-based and wavelength-swept implementations have both undergone rapid development. Comparative analysis of the potential benefits and limitations for the various configurations would be useful for matching technology capabilities to specific clinical problems. Here we take a first step in such a comparative analysis by presenting theoretical predictions and experimental results characterizing the lower and upper observable velocity limits in spectrometer-based versus swept-source Doppler OCT. Furthermore, we characterize the washout limit, the velocity at which signal degradation results in loss of flow information. We present comparative results from phantom flow data as well as retinal data obtained with a commercial spectrometer OCT system and a custom high-speed swept-source retinal OCT system.

Citation Download Citation

Hansford C. Hendargo, Ryan P. McNabb, Al-Hafeez Dhalla, Neal Shepherd, and Joseph A. Izatt "Doppler velocity detection limitations in spectrometer and swept-source Fourier-domain optical coherence tomography", Proc. SPIE 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV, 788911 (15 February 2011); https://doi.org/10.1117/12.876013

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