Abstract
We implemented a delta-Eddington scheme in conjunction with a finite-difference, discrete-ordinate, radiative- transport code to accurately and efficiently simulate light propagation in highly-forward-scattering media. It is demonstrated that light propagation does only weakly depend on the anisotropy factor, g, as long as the reduced scattering coefficient, |US', is much larger than the absorption coefficient, jna. When |ia ~ ps', the fluence rate decays faster in media with high g-values compared to isotropically scattering (g = 0) media. In heterogeneous media that contain void-like spaces, such as the cerebrospinal-fluid-filled ventricles in the brain, the choice of g barely affects the predicted light propagation. However, the diffusion approximation does not yield an accurate description of the light transport in these cases.
| Original language | English (US) |
|---|---|
| Title of host publication | Advances in Optical Imaging and Photon Migration, J. Fujimoto and M. Patterson, eds., Vol. 21 of OSA Trends in Optics and Photonics (Optica Publishing Group, 1998) |
| State | Published - 1998 |