International Journal of Heat and Mass Transfer, Vol.124, 1107-1116, 2018
Exact solution of thermal response in a three-dimensional living bio-tissue subjected to a scanning laser beam
At present, laser plays an important role in biomedical treatments and surgical techniques. To guarantee patients' safety, a deeply understanding of thermal responses of biological tissues during laser-tissue interaction is required. The existing analytical researches usually explore the bio-thermal process based on a one-dimensional heat conduction model because of the complication of the governing equations in three-dimensional case. The present study developed an analytical solution for the laser-tissue thermal interaction with a moving heat source based on a three-dimensional DPL thermal transfer model. The effects of the capillary vessel system and metabolism were under consideration. The expression of temperature in the cuboid bio-tissue was derived analytically by utilizing the Green's function approach and its accuracy was verified through agreement with a numerical simulation. The influences of the laser moving speed, the spot size of laser beam and the two parameters of relaxation times were discussed. (C) 2018 Elsevier Ltd. All rights reserved.
Keywords:Thermal response;Rio-tissue heat conduction;DPL model;Moving laser beam;Green's function approach