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Proceedings Paper

Computational methods for describing the laser-induced mechanical response of tissue
Author(s): Timothy G. Trucano; J. Michael McGlaun; Archie Farnsworth
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Paper Abstract

Detailed computational modeling of laser surgery requires treatment of the photoablation of human tissue by high intensity pulses of laser light and the subsequent thermomechanical response of the tissue. Three distinct physical regimes must be considered to accomplish this: (1) the immediate absorption of the laser pulse by the tissue and following tissue ablation, which is dependent upon tissue light absorption characteristics; (2) the near field thermal and mechanical response of the tissue to this laser pulse; and (3) the potential far field (and longer time) mechanical response of witness tissue. Both (2) and (3) are dependent upon accurate constitutive descriptions of the tissue. We briefly review tissue absorption and mechanical behavior, with an emphasis on dynamic loads characteristic of the photoablation process. In this paper our focus centers on the requirements of numerical modeling and the uncertainties of mechanical tissue behavior under photoablation. We also discuss potential contributions that computational simulations can make in the design of surgical protocols which utilize lasers, for example, in assessing the potential for collateral mechanical damage by laser pulses.

Paper Details

Date Published: 17 August 1994
PDF: 25 pages
Proc. SPIE 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards, (17 August 1994); doi: 10.1117/12.182934
Show Author Affiliations
Timothy G. Trucano, Sandia National Labs. (United States)
J. Michael McGlaun, Sandia National Labs. (United States)
Archie Farnsworth, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 2134:
Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards
Steven L. Jacques; David H. Sliney; Michael Belkin M.D., Editor(s)

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