Alternative oblique-incidence reflectometry for measuring tissue optical properties

To deduce the optical properties, the absorption coefficient mu(a) and redu ced scattering coefficient mu(s)', of turbid medium, Lin et al. (Appl. Opt. 34 (1995) 2362) proposed an oblique incidence reflectometry in which the d iffusion approximation was assumed. In this paper we propose an alternative method which does not assume the diffusion approximation but uses a Monte Carlo light propagation model. Two features are extracted from the diffuse reflectance distribution detected on the medium surface, and optical proper ties are then estimated by looking up the predetermined table generated by Monte Carlo simulations. The validity of the proposed method has been confi rmed by computer simulations.