Error bars indicate standard deviation. The three rectangles labeled A, V, and T indicate regions from the artery, vein, and tissue, respectively. The reflected intensity in T was used for normalization. The parametric estimates of q and m are shown in the box legends. The artery, containing more oxygen than the vein, is clearly distinguishable by color in both the SO2 and PO2 maps.
Error bars indicate standard error of the mean.
L is the distance that the reflected light must travel throught the blood and is approximately twice the vessel diameter, as expected. Actual anatomical distance is indicated by the bar in the lower right corner.