Fig. 5.

The blood flow response to the application and subsequent release of external force to simulate the reactive hyperemia experiments. (A) The en face OCTA map under no pressure that was used to guide the repeated B-scans to generate temporal blood flow signals, where the dashed line indicates the location of the time series of repeated B-scans. The scale bar represents 1 mm. (B) the illustration of collected time series of OCT B-scans and (C) corresponding temporal OCTA B-scans where the selected slab region of interested is marked by white dashed box. (D) Maximum intensity OCTA projection from the region of interest shown in (C) over 105-second repeated B-scans. (E) the blue trace indicates the time series of blood flow signals that was obtained by summing the OCTA signals within the region of interest at each B-scan shown in (C). The measured pressures (light red color) during the entire experiment are plotted alongside with the blood flow signal for easy comparison. (F) The frequency power of the time series of blood flow signals in (E). The red asterisk indicates the pulsatile component that is measured at 1.1 Hz. (G) Magnified image of the selected time window of ∼3s highlighted in the dashed rectangles shown in (E).