Expression of optical diffusion coefficient in high-absorption turbid media
Expression of optical diffusion coefficient in high-absorption turbid media
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DOI：
10.1088/0031-9155/42/12/017
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发表时间：
1997-12
影响因子：
3.5
通讯作者：
Nakai Tatsuya;G. Nishimura;Katsuyuki Yamamoto;M. Tamura
中科院分区：
文献类型：
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作者：
Nakai Tatsuya;G. Nishimura;Katsuyuki Yamamoto;M. Tamura
在无限边界条件下，通过稳态光透射测量，确定了高吸收均匀混浊介质中的光扩散系数。通过求解光学扩散方程，很好地描述了透射的强度。此外，光学扩散系数D由常数给出，其中是约化的散射系数，直到约的吸收系数。这些结果意味着，即使在高吸收混浊介质（如出血或血肿的病理活组织）中，吸收衰减也仅有助于沿由散射系数和系统几何形状定义的光路沿着指数衰减。
The optical diffusion coefficient in a homogeneous turbid medium with high absorption was determined by steady-state measurements of the light transmission under the infinite-boundary condition. The intensity of the transmission was well described by the solution of the optical diffusion equation. Moreover, the optical diffusion coefficient D was given by a constant, , where is the reduced scattering coefficient, up to the absorption coefficient of about . These results mean that attenuation by absorption only contributes to exponential attenuation along the optical path defined by the scattering coefficient and geometry of the system even in high-absorption turbid media such as the pathological living tissues of bleeding or haematoma.