National Taiwan University, Graduate Institute of Photonics and Optoelectronics, Department of Elect, Taiwan.
National Taiwan University, Graduate Institute of Electronics Engineering, Department of Electrical, Taiwan.
J Biomed Opt. 2018 Aug;23(8):1-9. doi: 10.1117/1.JBO.23.8.086004.
In optical coherence tomography (OCT) systems, to precisely obtain the scattering properties of samples is an essential issue in diagnostic applications. Especially with a higher density turbid medium, the light interferes among the adjacent scatters. Combining an OCT experiment with the finite-difference time-domain simulation method, the multiple scattering effect is shown to affect the scattering properties of medium depending on the interparticle spacing. The far-field scattering phase function of scatters with various diameters was simulated to further analyze the corresponding anisotropy factors, which can be introduced into the extended Huygens-Fresnel theory to find the scattering coefficient of measured samples.
在光学相干断层扫描（OCT）系统中，精确获取样品的散射特性是诊断应用中的一个重要问题。特别是在更高密度的混浊介质中，光会在相邻散射体之间相互干扰。通过将 OCT 实验与有限差分时域模拟方法相结合，可以发现多散射效应对介质的散射特性的影响取决于粒子间的间距。模拟了不同直径的散射体的远场散射相位函数，以进一步分析相应的各向异性因子，这些因子可以被引入扩展的惠更斯-菲涅尔理论，以找到测量样品的散射系数。
