Monte Carlo and discrete-ordinate simulations of spectral radiances in a coupled air-tissue system

Kjersti Hestenes, Kristian P. Nielsen, Lu Zhao, Jakob J. Stamnes, Knut Stamnes

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We perform a detailed comparison study of Monte Carlo (MC) simulations and discrete-ordinate radiative-transfer (DISORT) calculations of spectral radiances in a ID coupled air-tissue (CAT) system consisting of horizontal plane-parallel layers. The MC and DISORT models have the same physical basis, including coupling between the air and the tissue, and we use the same air and tissue input parameters for both codes. We find excellent agreement between radiances obtained with the two codes, both above and in the tissue. Our tests cover typical optical properties of skin tissue at the 280, 540, and 650 nm wavelengths. The normalized volume scattering function for internal structures in the skin is represented by the one-parameter Henyey-Greenstein function for large particles and the Rayleigh scattering function for small particles. The CAT-DISORT code is found to be approximately 1000 times faster than the CAT-MC code. We also show that the spectral radiance field is strongly dependent on the inherent optical properties of the skin tissue.

Original languageEnglish
Pages (from-to)2333-2350
Number of pages18
JournalApplied Optics
Volume46
Issue number12
DOIs
StatePublished - 20 Apr 2007

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