Coupled light transport-heat diffusion model for laser dosimetry with dynamic optical properties

Richard A. London; Michael E. Glinsky; George B. Zimmerman; David C. Eder; Steven L. Jacques

doi:10.1117/12.209941

22 May 1995 Coupled light transport-heat diffusion model for laser dosimetry with dynamic optical properties

Richard A. London, Michael E. Glinsky, George B. Zimmerman, David C. Eder, Steven L. Jacques

Proceedings Volume 2391, Laser-Tissue Interaction VI; (1995) https://doi.org/10.1117/12.209941
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

The effect of dynamic optical properties on the spatial distribution of light in laser therapy is studied via numerical simulations. A 2D, time dependent computer program called LATIS is used. Laser light transport is simulated with a Monte Carlo technique including anisotropic scattering and absorption. Thermal heat transport is calculated with a finite difference algorithm. Material properties are specified on a 2D mesh and can be arbitrary functions of space and time. Arrhenius rate equations are solved for tissue damage caused by elevated temperatures. Optical properties are functions of tissue damage, as determined by previous measurements. Results are presented for the time variation of the light distribution and damage within the tissue as the optical properties of the tissue are altered.

Citation Download Citation

Richard A. London, Michael E. Glinsky, George B. Zimmerman, David C. Eder, and Steven L. Jacques "Coupled light transport-heat diffusion model for laser dosimetry with dynamic optical properties", Proc. SPIE 2391, Laser-Tissue Interaction VI, (22 May 1995); https://doi.org/10.1117/12.209941

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