Fig. 4.

(a) Comparison of optical property values between the iterative and DNN methods using simulated data without adding noise. The root mean squared difference between the two methods is noted in each plot along with the black dashed identity line. (b) The same comparison using experimental data from a human subject. The gap in scattering values from ~0.8 to ~0.9 mm⁻¹ is due to the wavelength dependent nature of scattering. Scattering coefficients clustered around 1 mm⁻¹ are from 690 nm photons which experience significantly more scattering than the longer wavelengths used.