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Proceedings Paper

Comparative study of reflectance spectra for human Laogong acupoint and non-acupoint tissues irradiated by laser
Author(s): Zude Zhang; Zhouyi Guo; Huajiang Wei; Huiqing Zhong; Hongqin Yang; Shusen Xie; Songhao Liu
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Paper Abstract

Reflection spectra of human Laogong acupoint (PC8) and non-acupoint tissue which irradiated by different power were studied in the spectral range from 400 nm to 1000 nm in vivo. A wavelength of 808 nm semiconductor laser was used for irradiation at the power of 0 mw (empty irradiation), 20 mw, 50 mw and 100 mw for ten minutes. Reflection spectra were measured with an AvaSpec-2048 optical fiber spectroscopy with an integrating sphere attachment. The result shows that when empty irradiated, the shape of the reflectance spectra of Laogong acupoint and non-acupoint are similar, they have the same troughs at 423 nm, 544 nm, 577 nm and 980 nm, the reflectance at these wavelengths for Laogong acupoint are 17.1%, 26.1%, 25.9%, 35.0%, and for non-acupoint are 17.1%, 27.6%, 28.1%, 36.5%. But from 475 nm to 1000 nm, the reflectance of Laogong acupoint is smaller than that of non-acoupoint. After irradiated by laser at the power of 20 mw, 50 mw, and 100 mw, there is a very significant decrease in the reflectance spectra of Laogong acupoint comparing to that of empty irradiated, and the higher power, the lower reflectance. But there is just a small decrease in the reflectance spectra of non-acupoint comparing to that of empty irradiated. From the above results, it is clearly to see that Laogong acupoint is more sensitive than non-acupoint when irradiated by semiconductor laser.

Paper Details

Date Published: 6 March 2009
PDF: 7 pages
Proc. SPIE 7280, Seventh International Conference on Photonics and Imaging in Biology and Medicine, 72802Q (6 March 2009); doi: 10.1117/12.821488
Show Author Affiliations
Zude Zhang, South China Normal Univ. (China)
Zhouyi Guo, South China Normal Univ. (China)
Huajiang Wei, South China Normal Univ. (China)
Huiqing Zhong, South China Normal Univ. (China)
Hongqin Yang, Fujian Normal Univ. (China)
Shusen Xie, Fujian Normal Univ. (China)
Songhao Liu, South China Normal Univ. (China)


Published in SPIE Proceedings Vol. 7280:
Seventh International Conference on Photonics and Imaging in Biology and Medicine
Qingming Luo; Lihong V. Wang; Valery V. Tuchin, Editor(s)

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