open access

https://hdl.handle.net/2115/63354

Hybrid model of light propagation in random media based on the time-dependent radiative transfer and diffusion equations

英語

Light propagation in homogeneous random media

2014-11

Elsevier

Journal of Quantitative Spectroscopy and Radiative Transfer

147

145-154

Numerical modeling of light propagation in random media has been an important issue for biomedical imaging, including diffuse optical tomography (DOT). For high resolution DOT, accurate and fast computation of light propagation in biological tissue is desirable. This paper proposes a space–time hybrid model for numerical modeling based on the radiative transfer and diffusion equations (RTE and DE, respectively) in random media under refractive-index mismatching. In the proposed model, the RTE and DE regions are separated into space and time by using a crossover length and the time from the ballistic regime to the diffusive regime, View the MathML sourceρDA~10/μt′ and View the MathML sourcetDA~20/vμt′ where View the MathML sourceμt′ and v represent a reduced transport coefficient and light velocity, respectively. The present model succeeds in describing light propagation accurately and reduces computational load by a quarter compared with full computation of the RTE.

学術雑誌論文

Accepted Manuscript

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

© 2014, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

0022-4073