Fig. 10.

TD-DCS comparison between 765 and 1064 nm. (a) Comparison of the ${\mathrm{BF}}_i$ CoV versus gate start time for TD-DCS measurements conducted at 765 nm (red diamonds) and 1064 nm (green circles) using a 1-cm source–detector separation and the maximum power allowed by regulatory standards. (b) Evidence of cardiac pulsation in ${\mathrm{BF}}_i$ at a 5-Hz acquisition rate for early (0 to 150 ps, light green filled circles) and late (1000 to 1150 ps, dark green open circles) gates.