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Proceedings Paper

Effect of laser wavelengths and HpD on diffuse reflectance of tumor surface in mice
Author(s): Xiaoyuan Li; Runchu Tan; Hongmin Shi; Huajiang Wei
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Paper Abstract

We report the effect of laser wavelengths and HpD on diffuse reflectance of tumor surface in mice. Three kinds of lasers of six different wavelengths and hemetoporphyrin derivative as photosensitizer were used in the experiment. Tumor- bearing mice were divided into two groups. The mice of one group were given an i.p. injection of HpD 10 mg/kg. 24 hours later, the laser diffuse reflectance of tumor surface of the mice of two groups were measured by a single integrating sphere system with laser in six wavelengths. The results of measurement showed that significant difference of diffuse reflectance on tumor surface between the visible laser light and infrared laser light were observed. There was no significant difference in diffuse reflectance on tumor surface with and without i.p. injection of HpD. So it is unnecessary to consider the effect of HpD when calculating the actual laser dose irradiated into the tumor. The diffuse reflectance of tumor surface reaches its maximum at 1060nm wavelength, as twice as at 514.5 nm wavelength. It is hence concluded that diffuse reflectance should be taken into consideration when calculating the actual laser density for irradiation on tumors.

Paper Details

Date Published: 23 September 1996
PDF: 4 pages
Proc. SPIE 2887, Lasers in Medicine and Dentistry: Diagnostics and Treatment, (23 September 1996); doi: 10.1117/12.251957
Show Author Affiliations
Xiaoyuan Li, Sun Yat-sen Univ. of Medical Sciences (China)
Runchu Tan, Sun Yat-sen Univ. of Medical Sciences (China)
Hongmin Shi, Sun Yat-sen Univ. of Medical Sciences (China)
Huajiang Wei, Guangdong College of Pharmacy (China)


Published in SPIE Proceedings Vol. 2887:
Lasers in Medicine and Dentistry: Diagnostics and Treatment
Brij M. Khorana; Junheng Li; Michail M. Pankratov, Editor(s)

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