1997•Journal of the Optical Society of America ARequires access

Photon-density modes beyond the diffusion approximation: scalar wave-diffusion equation

A. Ya. Polishchuk, Semion Gutman, M. Lax, R. R. Alfano

Abstract

Various modifications of the diffusion model designed to describe photon migration in scattering and absorbing media are analyzed and compared in the nondiffusion region. A more accurate modified diffusion equation that has a broader region of applicability is introduced. The radiative-transfer equation is solved numerically to assess the validity range of different models tested and to select the best one.

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Key concepts: Photon diffusion, Photon transport in biological tissue, Diffusion equation, Diffusion, Scalar (mathematics), Radiative transfer, Physics, Photon