Hybrid diffusion approximation in highly absorbing media and its effects of source approximation

作者：Tian Huijuan^*; Liu Ying; Wang Lijun; Zhang Yuhui; Xiao Lifeng

来源：Chinese Optics Letters, 2009, 7(6): 515-518.

DOI：10.3788/COL20090706.0515

A modified diffusion approximation model called the hybrid diffusion approximation that can be used for highly absorbing media is investigated. The analytic solution of the hybrid diffusion approximation for reflectance ill two-source approximation and steady-state case with extrapolated boundary is obtained. The effects, of source approximation oil the analytic solution are investigated, and it. is validated that, two-source approximation in highly absorbing media to describe the optical properties of biological tissue is necessary. Monte Carlo simulation of recovering optical parameters from reflectant data is done with the use of this model. Tire errors of recovering mu(a) and mu(s)' are smaller than 1.5% for the reduced albedo between 0.77 and 0.5 with the source-detector separation of 0.4-3 mm.

• 出版日期2009-6-10
• 单位天津大学