In our pvOCM imaging experiments, four B-scans were taken for the same position as a BM-scan. The B-scan frame rate was , resulting in a BM-scan rate of . In offline data processing, B-scan images of the intensity and phase were generated following standard SD-OCT processing procedures, including background removal,45 spectra interpolation, numerical dispersion compensation,46 spectral reshaping, zero padding,45 and Fourier transforms. B-scan images of phase variance values were then calculated after the bulk motion was removed. The bulk motion was estimated using weighted mean phase changes between aligned successive B-scans at depths within the sample region,21,47 defined as Display Formula
(3)where is the OCM intensity in linear scale at position (), and the summation is performed over depth that contains the sample region.