“…The blood was modeled to have a hematocrit of 43% and a mean cell hemoglobin concentration of 345 g∕L RBC. Values for μ a;oxy were based on Zijlstra et al, 15 and values for μ a;deoxy were based on Prahl, 16 as these correlate best with data from other sources [17][18][19] and in our experience offer the best model fit. 3,20 Modeled spectra were calculated by adding the effect of absorption, using Beer-Lambert's law, in each layer to Monte Carlo-simulated models generated at distinct levels of epidermis thicknesses and scattering, where the total pathlength in each layer was stored for each photon.…”