Fig. 3.

(a-b) Mean-value-projection images of the 3D OCT mosaic and the label-free microangiography from a mouse ear in vivo, where ten images were stitched. The black arrow in panel a highlights a sebaceous gland. Bar: 0.5mm. (c) Pseudo-colored overlay image of the highlighted areas in the panel a and panel b within the squares. The microvasculature is pseudo-colored in red. The black arrow highlights the same sebaceous gland as in the panel a and its surrounding vasculatures. (d) Functional microangiography with color-coded sO₂ values. The colormap was created in HSV color space, where Hue was coded by the sO₂ as the color bar, Saturation and Value are coded by the intensity of the microangiography. (e) Histogram of sO₂ calculated from the selected arteriole and vein in panel d.