Kubelka-Munk 模型下的兔血管对He-Cd激光的散射与吸收特性

摘要

测量了兔动脉和静脉对He-Cd激光的反射和透射传输特性。实验采用两积分球系统及波长为441.6nm的He-Cd激光器，并根据测量数据及采用Kubelka-Munk模型分析和计算了兔动脉和静脉组织对该波长激光的吸收系统、散射系数及总的光强I(x)及前向散射通量i(x)和后向散射通量j(x)随厚度的变化情况。结果表明，兔动脉和静脉的漫反射率和透射率有明显差别，而且，动脉对激光的吸收系数明显较静脉的要小，而动脉对激光的散射系数却明显较静脉的要大，在动脉和静脉组织中总的光强I(x)及前向散射通量i(x)和后向散射通量j(x)随厚度的变化情况也有明显的区别。%The diffuse reflectance and transmittance of rabbit arter ies andveins were studied.441.6nm wavelength of He-Cd laser was used in the ex p eriment. The measurements were performed with two standard integrating sphere sy stems.The absorption coefficient,scattering coefficient and the changes of total optical intensities I(x),forward scattering flux i(x),backward scattering flux j(x) as a function of thickness of rabbit arteries and veins were evaluated and analyzed from the experimented data by Kubelka-Munk model.The results of measur e ment showed significant difference of diffuse reflectance and transmittance betw een arteries and veins at 441.6nm wavelength of He-Cd laser. Furthermore ,the a bsorption coefficient of arteries were obviously lesser than that of Veins at He -Cd laser wavelength.And the scattering coefficient of arteries were obviously bi gger than that of veins at He-Cd laser wavelength.The changes of total optical i ntensities I(x),forward scattering flux i(x), backward scattering flux j(x) as a function of thickness of rabbit arteries and veins were also significant differ ence.