生物组织的散射相函数及其二阶光学参量的性质  

Scattering Phase Function of Biological Tissue and the Properties of Second-Order Optical Parameter

作　　者：刘迎[1] 张小娟[1] 胡佑周[1] 

机构地区：[1]天津大学理学院物理系光电信息技术科学教育部重点实验室,天津300072

出　　处：《光学学报》2004年第7期877-880,共4页Acta Optica Sinica

基　　金：国家自然科学基金 (6 0 2 780 0 4 )资助课题

摘　　要：生物组织是一种复杂介质 ,在许多情况下仅仅用各向异性因子 g来描述其散射特性是不够的。由于二阶参量γ是一个与相函数的二阶矩 g2 有关 ,并表示与一阶参量 g1关系的量 ,因此用 g和γ两个参量能更好地描述组织的光学性质。对几种目前用于描述人体组织的相函数及其二阶参量作了简要讨论 ,在此基础上研究了相函数的选取对测量参量γ的影响。研究表明γ是一个可测量的组织参量。研究工作对于建立含有相函数高阶矩的漫散射理论 ,对如何测量生物组织的高阶参量γ 。Biological tissue is a complex medium, only anisotropic factor g is not enough to describe its scattering properties in many situations. The scattering properties of tissues can be characterized with parameters g and γ, where γ is a quantity that relates to second order moment g 2 of phase function, and shows the relationship between g 2 and first order moment g 1. Some phase functions used to characterize the tissues at present and their second order parameter γ are studied, and the influence of phase function choice on γ measuement is discussed. The results demonstrate that γ is a measurable tissue quantity. These researches have teoretical significame and are practically valuable to consummate diffuse scattering theory and measure high\|order parameter γ of tissues and other optical parameters.

关 键 词：生物光学 相函数 高阶光学参量 光学特性 

分 类 号：O572[理学—粒子物理与原子核物理]