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Proceedings Paper

Combined laser and glycerol enhancing skin optical clearing
Author(s): Caihua Liu; Zhongwei Zhi; Valery V. Tuchin; Dan Zhu
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Paper Abstract

The inherent barrier function of the stratum corneum (SC) makes optical clearing agents difficult to penetrate into skin. To date, several physicochemical methods have been studied to enhance skin optical clearing. In this study, the rat skin was initially irradiated by various light (Carbon-Dioxide Laser, Intensed Pulse Light, Nd:YAG Laser and its frequency-doubled laser) with different dose, and then topically applied anhydrous glycerol. A fiber spectrometer was used to monitor the change of skin diffuse reflectance spectrum so as to evaluate the optical clearing effect on skin. The results showed that Nd:YAG Laser(1,064 nm) with appropriate pulse width and energy density combined with glycerol could improve skin optical clearing effectively, and that Q-switched Nd:YAG Laser combining glycerol made the most significant decrease of skin diffuse reflectance. However, after the irradiation of Carbon-Dioxide Laser (ultra-pulsed), Intensed Pulse Light (400-700 nm) or frequency-doubled Q-switched Nd:YAG Laser(532 nm), the following application of glycerol didn't lead to skin optical clearing. Adversely, higher power of the former two light could result in erythema, the later one may harm skin apparently even lead to blood coagulation dot. This study provids a new idea to find out a noninvasive but high-effective approach to increase skin optical clearing, and available parameters of laser need to be further investigated.

Paper Details

Date Published: 20 February 2009
PDF: 10 pages
Proc. SPIE 7186, Optical Diagnostics and Sensing IX, 71860D (20 February 2009); doi: 10.1117/12.811304
Show Author Affiliations
Caihua Liu, Huazhong Univ. of Science and Technology (China)
Zhongwei Zhi, Huazhong Univ. of Science and Technology (China)
Valery V. Tuchin, Saratov State Univ. (Russian Federation)
Dan Zhu, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 7186:
Optical Diagnostics and Sensing IX
Gerard L. Coté, Editor(s)

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