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Numerical Simulation of OptoThermal Response of LaserIrradiated Bovine Tissue for DynamicallyChanged Optical and Thermal Properties
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TONG Yaxing,HUANG Meizhen,DING Haifeng
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(Institute of Optical Engineering, Department of Physics, Shanghai Jiaotong University, Shanghai 200240, China)
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Abstract The effect of optical and thermal properties dynamicallychanged with temperature on the opticalthermal response of laserirradiated bovine tissue was studied and the finiteelement method was employed. The simulation result shows that ① the temperature increase will be overestimated when both optical parameters(μa and μs) and thermal parameters（c, k and ρ）are assumed to be constant; ② compared with thermal properties, dynamical optical properties will cause a greater degree of influence of bovine tissue temperature response; ③ during the irritation of laser, there will form an optical barrier near the surface of bovine tissue, which will affect the distribution of the photon within the bovine tissue and this result was proved by MonteCarlo method.
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Received: 07 September 2009
Published: 31 August 2010
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