Influence of water content on the ablation of skin with a 532 nm nanosecond Nd:YAG laser

Soogeun Kim; Tae Joong Eom; Sungho Jeong

doi:10.1117/1.JBO.20.1.018001

12 January 2015 Influence of water content on the ablation of skin with a 532 nm nanosecond Nd:YAG laser

Soogeun Kim, Tae Joong Eom, Sungho Jeong

Author Affiliations +

Journal of Biomedical Optics, Vol. 20, Issue 1, 018001 (January 2015). https://doi.org/10.1117/1.JBO.20.1.018001

Abstract

This work reports that the ablation volume and rate of porcine skin changed significantly with the change of skin water content. Under the same laser irradiation conditions (532 nm Nd:YAG laser, pulse width = 11.5 ns, pulse energy = 1.54 J, beam radius = 0.54 mm), the ablation volume dropped by a factor of 4 as the skin water content decreased from 40 wt. % (native) to 19 wt. % with a change in the ablation rate below and above around 25 wt. %. Based on the ablation characteristics observed by in situ shadowgraph images and the calculated tissue temperatures, it is considered that an explosive rupture by rapid volumetric vaporization of water is responsible for the ablation of the high water content of skin, whereas thermal disintegration of directly irradiated surface layer is responsible for the low water content of skin.

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Soogeun Kim, Tae Joong Eom, and Sungho Jeong "Influence of water content on the ablation of skin with a 532 nm nanosecond Nd:YAG laser," Journal of Biomedical Optics 20(1), 018001 (12 January 2015). https://doi.org/10.1117/1.JBO.20.1.018001

Published: 12 January 2015

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KEYWORDS

Laser ablation

Skin

Tissues

Laser tissue interaction

Nd:YAG lasers

Water

Tissue optics

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