Fig. 5.

Comparison of the optical properties of phantoms versus human tissue. A plot of $b$ versus $a$ for human tissues and PDMS phantoms, where the parameters $a$ and $b$ are defined in Eq. (2). The $a$ and $b$ parameters for tissues are taken from Jacques (Ref. ¹). The inset shows the same parameters for PDMS phantoms with CBP and TDP (round dots) and three PDMS phantoms with varying concentrations of TDP and PS beads (“x” marks). The vertical bars represent uncertainty bounds ($k=1$), although in most cases the plotted uncertainty is smaller than the point size.