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Proceedings Paper

Quantitative investigation of thermal damage in Er:YAG laser skin resurfacing
Author(s): Boris Majaron; Primoz Plestenjak; Matjaz Lukac
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Paper Abstract

Feasibility of deep coagulation of skin with superficially absorbed Er:YAG lasers is investigated using a numerical model. Unlike most previous models, the skin is treated as a two-component material: water trapped in spherical cavities inside an infinite elastic medium. In describing the interaction of mid-IR laser light with skin, thermodynamic behavior of pressurized hot water and steam is combined with elastic response of the surrounding medium. A one-dimensional treatment of heat diffusion and the Arrhenius model of the protein denaturation process are also included in the model. Temperature evolution, profile and coagulation depth are analyzed as a function of the pulse duration, number of applied pulses and repetition frequency of the sequence. The results indicate that the depth of coagulated layer, which amounts to 15 - 40 micrometer with a single free-generated Er:YAG laser pulse, can be extended up to 200 micrometer with no surface ablation by using a repetitive pulse sequence of suitable single-pulse fluence, repetition frequency and duration.

Paper Details

Date Published: 1 July 1998
PDF: 8 pages
Proc. SPIE 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII, (1 July 1998); doi: 10.1117/12.312308
Show Author Affiliations
Boris Majaron, Jozef Stefan Institute (Slovenia)
Primoz Plestenjak, Jozef Stefan Institute (Slovenia)
Matjaz Lukac, Jozef Stefan Institute (Slovenia) and Slovenian Development Corp. (Slovenia)


Published in SPIE Proceedings Vol. 3245:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII
Graham M. Watson; Harvey Lui; Lou Reinisch; Penny J. Smalley; Kenneth Eugene Bartels; R. Rox Anderson; Lawrence S. Bass; Kenneth Eugene Bartels; C. Gaelyn Garrett; Lloyd P. Tate; Sharon L. Thomsen; Reza S. Malek; Aaron P. Perlmutter; R. Rox Anderson; Lawrence S. Bass; C. Gaelyn Garrett; Kenton W. Gregory; Harvey Lui; Reza S. Malek; Aaron P. Perlmutter; Lou Reinisch; Penny J. Smalley; Lloyd P. Tate; Sharon L. Thomsen; Graham M. Watson, Editor(s)

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