Simultaneous analysis of extinction and flow velocity with joint Spectral and Time domain OCT

摘要

In this contribution we propose a new method of acquisition and analysis of Spectral Optical Coherence Tomography data to obtain information about depth dependent extinction in the scattering media. In joint Spectral and Time domain OCT a set of Spectral Optical Coherence Tomography fringes is acquired in time increments. An axial component of the flow velocity vector is accurately estimated from Doppler beating signal. Additional filtering and averaging of spatial-temporal data allows for effective reduction of the speckle noise and enables reconstructing the envelope of spectral fringes corresponding to the chosen depth. In this way the depth and wavelength dependent attenuation of light can be determined in scattering media. In this contribution we demonstrate the proof of concept of spectroscopic OCT analysis performed in scattering media and we discuss its potential for in-vivo functional imaging of the human retina.