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Radiative transfer with delta-Eddington-type phase functions
Journal article   Peer reviewed

Radiative transfer with delta-Eddington-type phase functions

Weimin Han, Feixiao Long, Wenxiang Cong, Xavier Intes and Ge Wang
Applied mathematics and computation, Vol.300, pp.70-78
05/01/2017
DOI: 10.1016/j.amc.2016.12.001
PMCID: PMC5847318
PMID: 29545654
url
https://www.ncbi.nlm.nih.gov/pmc/articles/5847318View
Open Access

Abstract

The radiative transfer equation (RTE) arises in a wide variety of applications, in particular, in biomedical imaging applications associated with the propagation of light through the biological tissue. However, highly forward-peaked scattering feature in a biological medium makes it very challenging to numerically solve the RTE problem accurately. One idea to overcome the difficulty associated with the highly forward-peaked scattering is through the use of a delta-Eddington phase function. This paper is devoted to an RTE framework with a family of delta-Eddington-type phase functions. Significance in biomedical imaging applications of the RTE with delta-Eddington-type phase functions are explained. Mathematical studies of the problems include solution existence, uniqueness, and continuous dependence on the problem data: the inflow boundary value, the source function, the absorption coefficient, and the scattering coefficient. Numerical results are presented to show that employing a delta-Eddington-type phase function with properly chosen parameters provides accurate simulation results for light propagation within highly forward-peaked scattering media.
 Continuous dependence Existence Generalized delta-Eddington phase function Radiative transfer equation Uniqueness

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