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Proceedings Paper

Free-boundary model for local thermal coagulation
Author(s): Igor A. Lubashevsky; Alexander V. Priezzhev; Vasyl V. Gafiychuk; Meruzhan G. Cadjan
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Paper Abstract

We propose a new mathematical model for the growth of a necrosis domain due to thermal coagulation. We assume that laser light is locally delivered to a small internal region where laser energy absorption causes the temperature to attain high values leading to immediate tissue coagulation. Heat diffusion into the surrounding tissue causes its further thermal coagulation, giving rise to the growth of the necrosis domain. The coagulation is treated in terms of irreversible phase transition, i.e. the coagulation is assumed to occur after the tissue temperature exceeds a certain threshold value Tcg. Two alternative models, the developed one and the model previously used are compared. The effects of the blood flow nonuniformity, the tissue response to temperature variations, and the delay of this response are analyzed in detail.

Paper Details

Date Published: 7 May 1996
PDF: 11 pages
Proc. SPIE 2681, Laser-Tissue Interaction VII, (7 May 1996); doi: 10.1117/12.239559
Show Author Affiliations
Igor A. Lubashevsky, Moscow State Univ. (Russia)
Alexander V. Priezzhev, Moscow State Univ. (Russia)
Vasyl V. Gafiychuk, Moscow State Univ. (Russia)
Meruzhan G. Cadjan, Moscow State Univ. (Russia)


Published in SPIE Proceedings Vol. 2681:
Laser-Tissue Interaction VII
Steven L. Jacques, Editor(s)

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