面光源在皮肤组织中传输的蒙特卡罗模拟计算

摘要

Monte Carlo method is used to calculate light transmission in biological tissue,but the most calculations are limited to vertical incidence of linar light source.In the practical application,the shape,size,intensity distribution and convergence of incident light source all affect the light propagation in biological tissue.Taking flat beams and Gaussi-an beams as an example,the effects of the size,intensity distribution and convergence of the beams on light energy dis-tribution are discussed.%光在生物组织中的传输可用蒙特卡罗模拟来计算，但多数局限于对线光源垂直入射的模拟。在实际的使用中，入射光源的形状、大小、光强分布和会聚情况对生物组织内的光传输均有影响。本文以最简单的强度均匀分布的圆形面光源（平圆光源）和实际使用中最具代表性的强度成高斯分布的面光源（高斯光源）为例，讨论光束的大小，强度分布和聚焦情况对生物组织内光能量分布的影响。