Monte Carlo simulation of an optical coherence tomography signal in homogeneous turbid media
Monte Carlo simulation of an optical coherence tomography signal in homogeneous turbid media
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DOI：
10.1088/0031-9155/44/9/316
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发表时间：
1999-09-01
影响因子：
3.5
通讯作者：
Wang, LHV
中科院分区：
文献类型：
--
作者：
Yao, G;Wang, LHV
采用角度偏置蒙特卡罗技术模拟均匀浑浊介质的光学相干层析成像（OCT）信号。OCT信号分为两类：一类是来自介质中的目标成像层（I类）；另一种来自介质的其余部分（II类）。这两类信号在空间分布、角度分布和经历散射事件的次数上有很大的不同。多重散射光既能产生第一类信号，也能产生第二类信号。散射事件的平均次数随探测深度线性增加。第二类信号的衰减速度比第一类信号慢得多，第一类信号的衰减常数接近浑浊介质的总衰减系数。研究了介质的光学性质对一类信号衰减的影响。
The Monte Carlo technique with angle biasing is used to simulate the optical coherence tomography (OCT) signal from homogeneous turbid media. The OCT signal is divided into two categories: one is from a target imaging layer in the medium (Class I); the other is from the rest of the medium (Class II). These two classes of signal are very different in their spatial distributions, angular distributions and the numbers of experienced scattering events. Multiply scattered light contributes to the Class I signal as well as the Class II signal. The average number of scattering events increases linearly with the probing depth. The Class II signal decays much more slowly than the Class I signal whose decay constant is close to the total attenuation coefficient of the turbid medium. The effect of the optical properties of the medium on the Class I signal decay is studied.