| An Improved Computing Method for Analysing the Spatial Resolved Reflectance from Biological Tissues |
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| 作者姓名： | 来建成 李振华 贺安之 |
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| 作者单位： | DepartmentofInformationPhysicsandEngineering,NanjingUniversityofScienceandTechnology,Nanjing210094 |
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| 摘 要： | A mathematical expression of refiectance point-spread function, which is defined as the spatial distribution of light diffuse-reflected from bio-tissues irradiated by an infinitely narrow photon beam, is derived from the difusion approximation (DA) theory. With the introduction of reflectance point-spread function to describe the reflectance characteristics of bio-tissues, the convolution method is used to calculate the spatial resolved reflectance from dense and thick tissues irradiated by different photon beams. This is called the DA based convolution method and is used to calculate the responses of the semi-infinite bio-tissues irradiated by a Gaussian beam and a flat beam with different beam radius. The calculation results show that the DA based convolution method has much higher computing efficiency compared to the Monte Carlo method.
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| 关 键 词： | 生物组织 反射系数 光学诊断技术 蒙特卡罗法 吸收系数 散射系数 |
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