| 光谱学与光谱分析 |
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| Comparative Study of Reflectance Spectroscopy of Human Laogong Acupoint and Non-Acupoint Tissues Irradiated by Near-Infrared Laser |
| ZHANG Zu-de1，GUO Zhou-yi1，WEI Hua-jiang1*，LIU Han-ping1，ZHONG Hui-qing1，YANG Hong-qin2，XIE Shu-sen2， LIU Song-hao1 |
1. Key Laboratory of Laser Life Science and Institute of Laser Life Science, Ministry of Education, South China Normal University, Guangzhou 510631, China
2. Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, China |
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Abstract Characteristics and differences of reflectance spectroscopy of human Laogong acupoint and non-acupoint tissues before and after irradiation by different power of laser were studied in the spectral range from 400 to 1 000 nm. A wavelength 808 nm semiconductor laser was used for irradiation at the power of 20, 50 and 100 mW for ten minutes. Reflectance spectra of human Laogong acupoint and non-acupoint tissues were measured by using an AvaSpec-2048 optical fiber spectroscopy with an integrating sphere attachment. The result shows that before irradiation the shape of the reflectance spectra of Laogong acupoint and non-acupoint is similar, they have the same troughs at 423, 544, 577 and 980 nm, and the reflectance for Laogong acupoint and non-acupoint at these wavelengths is 17.1%, 26.1%, 25.9% and 35.0%, and 17.1%, 27.6%, 28.1% and 36.5% respectively. But from 475 to 1 000 nm, the reflectance of Laogong acupoint is smaller than that of non-acupoint. After being irradiated by semiconductor laser at the power of 20, 50 and 100 mW, there is a very significant decrease in the reflectance of Laogong acupoint compared to that before irradiation, and the higher the power, the lower the reflectance. But there is just a small decrease in the reflectance for non-acupoint compared to that before irradiation. From the above results, it is clearly seen that Laogong acupoint is different from non-acupoint on reflectance spectroscopy, and Laogong acupoint is more sensitive to laser irradiation than non-acupoint tissue.
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Received: 2008-11-18
Accepted: 2009-02-22
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Corresponding Authors:
WEI Hua-jiang
E-mail: weihj@scnu.edu.cn
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