脉冲激光波长对生物组织温度场影响趋势研究

Influence Trend Study of Temperature Distribution in Skin Tissue Generated by Different Wavelength Pulse Laser

根据生物组织热传导方程,分析了激光与生物组织作用的热传递数学模型,建立了基于有限元方法的的三层皮肤组织模型,给出了采用ANSYS软件进行组织温度场求解的流程,仿真研究了不同波长脉冲激光在皮肤组织内部产生的温度场特性,得出了组织内部温度场分布、激光入射深度与激光波长之间的关系。结果表明,激光波长增大,皮肤组织的温升效果呈下降趋势。由于皮肤组织对不同波长激光具有不同的吸收特性和衰减特性,使得激光的入射深度在很大程度上取决于与激光波长。

The mathematics model of bio-tissue heat transfer that is irradiated by laser is analyzed based on thermal conduction equations of biological tissue. The three layer skin tissue model is established based on FEM method. The solving flow of temperature in tissue is given by adopting ANSYS software. The temperature distribution characteristic of skin tissue generated by different wave-length laser is simulated. The relation between temperature distribution in skin tissue and laser incidence depth and laser wavelength is attained. The results show that the temperature rising effect is descend along with laser wavelength increasing. Because the skin tis-sue has different absorbing and attenuation characteristic with different laser wavelength, laser incidence depth depends on laser wave-length.