激光照射下生物组织内的双曲型导热研究  

Study on the Hyperbolic Heat Conduction in Laser Irradiated Biological Tissue

作　　者：周建华[1] 刘登瀛[1] 徐建中[1] 淮秀兰[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080

出　　处：《中国激光》2002年第12期1127-1132,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金重点基金 (5 9736 130 );国家重点基础研究发展规划项目资金 (G2 0 0 0 0 2 6 30 5 )资助项目

摘　　要：以激光在生物医学中的应用为背景 ,对激光照射下生物组织内的双曲型导热问题进行了研究。将激光传输的七流模型与圆柱坐标系内的二维双曲型导热模型相结合建立了理论模型 ;将激光照射处理为容积吸收 (即考虑激光在生物组织中的散射和吸收 )所得到的计算结果 ,与将激光照射处理为第二类传热边界条件所得到的计算结果相比 ,两者差别很大 ;考察了激光照射下散射系数和吸收系数对生物组织内双曲型导热的影响。Considering the laser applications in biology and medicine as background, this paper presented a theoretical research on the hyperbolic heat conduction in laser irradiated tissue. A numerical model was established by combining the seven-flux model of light propagation with the two-dimensional hyperbolic heat conduction model in cylindrical coordinates. It showed that there exists a great discrepancy between the results obtained by treating the laser irradiation as volumetric absorption (i.e. taking laser scattering and absorption into consideration) and those obtained by treating the laser irradiation as the second boundary condition. The effects of the scattering and absorption coefficients of tissue on the hyperbolic heat conduction in laser irradiated tissue were discussed.

关 键 词：激光 生物组织 双曲型导热 

分 类 号：Q631[生物学—生物物理学] R318.51[医药卫生—生物医学工程]