Abstract

The traditional diffusion theory, often used for isotropic sources, becomes inaccurate at short source–detector spacings and cannot be applied to media with large absorption or with small scattering strengths. We show that for any type of source anisotropy, a Green’s-function-based procedure can remove these limitations. The accuracy of the new approach is examined through a comparison with the numerical solution to the radiative transfer equation.

© 2005 Optical Society of America

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