Asymmetric diffusion model for oblique-incidence reflectometry

A diffusion theory model induced by a line source distribution is presented for oblique-incidence reflectometry.By fitting to this asymmetric diffusion model,the absorption and reduced scattering coefficients μa and μ’s of the turbid medium can both be determined with accuracy of 10% from the absolute profile of the diffuse reflectance in the incident plane at the negative position-1.5 transport mean free path(mfp’) away from the incident point;particularly,μs’ can be estimated from the data at positive positions within 0-1.0 mfp’ with 10% accuracy.The method is verified by Monte Carlo simulations and experimentally tested on a phantom.