NUMERICAL MODELLING OF THE LASER HIGH-TEMPERATURE HYPERTHERMIA USING THE DUAL-PHASE LAG EQUATION1

In the paper, thermal processes occurring in a soft tissue subjected to laser irradiation are analyzed. The bioheat transfer in an axisymmetric domain is described by a dual-phase lag equation, which takes into account temperature-dependent thermophysical parameters of the tissue. The source term in this equation is related to laser irradiation, and is determined by solving the optical diffusion equation. It is assumed that the optical parameters depend on the Arrhenius integral, which is a measure of the degree of tissue destruction. In the model, the process of evaporation of water contained in the tissue is also considered.