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【摘 要】
：
针对标准漫射近似模型受限于接近各向同性光辐射以及光源-探测器距离远大于一个输运平均自由程的问题，提出了一种改进标准漫射近似模型。该模型在空气-生物组织边界处引入另一个点源，减小了近光源处的误差。分析了各向异性因子和μ′s/μa(μ′s为有效散射系数，μa为吸收系数)比值对漫反射分布的影响，并结合非线性最小二乘算法对光学特性参数μa、μ′s进行了反演求解。结果表明，与标准漫射近似模型相比，改进模型可显著减小漫反射分布曲线误差，提高反演精度。改进模型的反演精度接近双点源Delta-P1近似模型，同时能较好地克
【机 构】
：
江南大学物联网工程学院轻工过程先进控制教育部重点实验室,江苏无锡214122
【出 处】
：
激光与光电子学进展
【发表日期】
：
2016年53期
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