Resolving directional ambiguity in dynamic light scattering-based transverse motion velocimetry in optical coherence tomography.
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.
Brendan K
BK
Huang
Michael A
MA
Choma
D008027:Light; D009038:Motion; D012542:Scattering, Radiation; D041623:Tomography, Optical Coherence / Q000379:methods*