Dynamic light scattering-based optical coherence tomography approaches have been successfully implemented to measure total transverse (xy) flow speed, but are unable to resolve directionality. We propose a method to extract directional velocity in the transverse plane by introducing a variable scan bias to our system. Our velocity estimation, which yields the directional velocity component along the scan axis, is also independent of any point-spread function calibration. By combining our approach with Doppler velocimetry, we show three-component velocimetry that is appropriately dependent on latitudinal and longitudinal angle.
© 2014 Optical Society of America
Coherence and Statistical Optics
Original Manuscript: November 5, 2013
Manuscript Accepted: December 4, 2013
Published: January 23, 2014
Vol. 9, Iss. 4 Virtual Journal for Biomedical Optics
Brendan K. Huang and Michael A. Choma, "Resolving directional ambiguity in dynamic light scattering-based transverse motion velocimetry in optical coherence tomography," Opt. Lett. 39, 521-524 (2014)