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运用光生物学、基础医学以及物理学的基本理论 ,探讨了人血管组织的激光传播特性 ,定量测定了人血管组织的激光传输参量。采用标准积分球测量了人血管组织样品在 632 .8nmHe Ne激光照射下的透射比T和反射比R ,推算吸收比A。并把分光仪改装为光散射测量装置 ,测量了 632 .8nmHe Ne激光照射下 ,- 90°～ 90°散射角范围内的散射相函数S(θ) ,计算散射余弦平均值 μ。结果表明 :人血管组织受小功率 (P =2 0mW ) 632 .8nmHe Ne激光照射时 ,光强衰减符合指数衰减规律 ,人血管组织对激光有较弱的前向散射
Using the basic theories of photobiology, basic medicine and physics, the laser propagation characteristics of human vascular tissue were discussed, and the laser transmission parameters of human vascular tissue were quantitatively determined. A standard integrating sphere was used to measure the transmittance T and the reflectance R of a human vascular tissue sample under 632.8 nm HeNe laser irradiation, and the absorption ratio A was estimated. The spectrometer was modified to be a light scattering measurement device. The scattering phase function S (θ) within the scattering angle range of -90 ° to 90 ° under 632.8 nm He Ne laser was measured to calculate the mean value of scattering cosine μ. The results showed that when the human vascular tissue was irradiated with low power (P = 20mW) 632 .8nm He Ne laser, the attenuation of light intensity accorded with the exponential decay law, and the human blood vessel tissue had weaker forward scattering