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. Author manuscript; available in PMC: 2009 Jul 29.
Published in final edited form as: Opt Express. 2008 Dec 22;16(26):21434–21445. doi: 10.1364/oe.16.021434
PVraw(t) no processing other than spatial averaging over ROI or coarse grid cell;
PVAC(t) the mean over time of PVraw(t) is subtracted (= PVraw(t) minus DC); or
PVBP(t) band-pass filtered PVraw(t) signal.