高功率激光与生物组织热相互作用的传热模型

Heat Transfer Model for Thermal Interaction in Biological Tissue Irradiated by High-power Laser

基于高功率激光与生物组织作用会产生汽化、碳化和熔融等相变热效应的事实,建立了热相互作用的传热分析模型,它考虑了碳化层的存在,并具有两个移动的相间边界。不同激光强度下的数值模拟给出了组织中的温度场以及相间边界的温度、移动速度等参数的变化规律,进而预测激光切割深度,组织热损伤区大小,各种热效应发生时间等。

A new heat transfer analysis model was proposed for high-power laser-tissue thermal interaction. A carbonization layer was considered in the analysis model and two different phase-changing interfaces were introduced. The melting depth, thermal injury depth and the critical time for different thermal effect in tissue were numerically predicated.