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

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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.

© 1997 Optical Society of America

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