Improving the Accuracy of the Diffusion Model in Highly Absorbing Media

Cong, Alexander X.; Shen, Haiou; Cong, Wenxiang; Wang, Ge

doi:https://doi.org/10.1155/2007/38168

International Journal of Biomedical Imaging

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Recent Advances in Molecular Imaging

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Research Article | Open Access

Volume 2007 | Article ID 038168 | https://doi.org/10.1155/2007/38168

Improving the Accuracy of the Diffusion Model in Highly Absorbing Media

Alexander X. Cong,¹Haiou Shen,¹Wenxiang Cong,¹and Ge Wang¹

Academic Editor: Wei Liang

Received14 Apr 2007

Accepted28 Jun 2007

Published29 Aug 2007

Abstract

The diffusion approximation of the Boltzmann transport equation is most commonly used for describing the photon propagation in turbid media. It produces satisfactory results in weakly absorbing and highly scattering media, but the accuracy lessens with the decreasing albedo. In this paper, we presented a method to improve the accuracy of the diffusion model in strongly absorbing media by adjusting the optical parameters. Genetic algorithm-based optimization tool is used to find the optimal optical parameters. The diffusion model behaves more closely to the physical model with the actual optical parameters substituted by the optimized optical parameters. The effectiveness of the proposed technique was demonstrated by the numerical experiments using the Monte Carlo simulation data as measurements.

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Copyright

Copyright © 2007 Alexander X. Cong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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