a Measurement Center, Zhanjiang Normal College, Zhanjiang 524048, Chinab Photonics Center, Institute of Physics, Nankai University, Tianjin 300071, China; c Tianjin Medical College, Tianjin 300052, China
Abstract Based on the diffusion approximate theory (DA), a theoretical model about the distribution of the intensity of a narrow collimation beam illuminating on a semi-infinite biological tissue is developed. In order to verify the correctness of the model, a novel method of measuring the distributions of the intensity of light in Intralipid-10% suspension at 650 nm is presented and measurements of the distributions of the distance-dependent intensity of scattering light in different directions are made. The investigations show that the results from our diffusion model are in good agreement with the experimental results beyond and in the areas around the light source, and the distance-dependent intensity in the incident direction attenuates approximately in the exponential form. Furthermore, our theoretic results indicate the anisotropic characteristics of the intensity in different directions of scattering light inside the biological tissue.
Received: 21 March 2005
Revised: 30 May 2005
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 60278007), the Natural Science Foundation of Tianjin (Grant No 033601311) and the Natural Science
Foundation of Guangdong Province (Grant No 04011427).
Cite this article:
Xu Tang (许棠), Zhang Chun-Ping (张春平), Chen Gui-Ying (陈桂英), Tian Jian-Guo (田建国), Zhang Guang-Yin (张光寅), Zhao Cheng-Mei (赵承梅) Theoretical and experimental study of the intensity distribution in biological tissues 2005 Chinese Physics 14 1813
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