中国物理B ›› 2005, Vol. 14 ›› Issue (9): 1813-1820.doi: 10.1088/1009-1963/14/9/022

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Theoretical and experimental study of the intensity distribution in biological tissues

许棠1, 张春平2, 陈桂英2, 田建国2, 张光寅2, 赵承梅3   

  1. (1)Measurement Center, Zhanjiang Normal College, Zhanjiang 524048, China;Photonics Center, Institute of Physics, Nankai University,Tianjin 300071, China; (2)Photonics Center, Institute of Physics, Nankai University,Tianjin 300071, China; (3)Tianjin Medical College, Tianjin 300052, China
  • 收稿日期:2005-03-21 修回日期:2005-05-30 出版日期:2005-09-20 发布日期:2005-09-20
  • 基金资助:
    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).

Theoretical and experimental study of the intensity distribution in biological tissues

Xu Tang (许棠)ab, Zhang Chun-Ping (张春平)b, Chen Gui-Ying (陈桂英)b, Tian Jian-Guo (田建国)b, Zhang Guang-Yin (张光寅)b, Zhao Cheng-Mei (赵承梅)c   

  1. 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
  • Received:2005-03-21 Revised:2005-05-30 Online:2005-09-20 Published:2005-09-20
  • Supported by:
    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).

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摘要： 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.

关键词: biological tissue, light distribution, radiation intensity

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.

Key words: biological tissue, light distribution, radiation intensity

中图分类号: 

  • 87.50.W-
87.10.-e (General theory and mathematical aspects) 82.70.Kj (Emulsions and suspensions) 42.25.Fx (Diffraction and scattering)