红外激光蚀除生物组织过程的时间演化规律

Process evolution of infrared laser tissue ablation

在描述激光蚀除生物组织过程的多层结构模型的基础上,研究了激光蚀除生物组织过程中组织的温度场、热损伤程度等表征蚀除过程和效果的主要物理量的时间演化规律。以10W/mm2的CO2激光蚀除人体皮肤组织为例进行了数值计算,得到了组织发生汽化脱水、干化和碳化等重要变化的时刻、蚀除界面移动和蚀除进入准稳定状态的时刻以及蚀除过程中组织的温度场、蚀除界面和各层组织间相界面等物理量的时间演化规律。

A dynamic multi-zone model was used to study the evolutions of tissue temperature distribution, thermal damage extent ,and other important parameters that represent the ablation process and curative effect of laser surgery. Simulations of the process of human skin ablation by CO2 laser with a laser power of 10 W/mm^2 were performed. The important results were obtained,including the times of vaporization,carbonization,ablation front starting to move,quasi-steady ablation beginning ,and the evolutions of the tissue temperature dlstribution,ablation front .boundaries between different zones.