Sassaroli A, Martelli F, Imai D, Yamada Y
Mechanical Engineering Laboratory, Biomechanics Division, AIST, MITI, Tsukuba, Ibaraki, Japan.
Phys Med Biol. 1999 Nov;44(11):2747-63. doi: 10.1088/0031-9155/44/11/305.
A detailed study about ultra-short pulse light propagation inside cylindrical scattering and absorbing phantoms is presented. Some comparisons between a Monte Carlo code and the analytical solution of diffusion equation for a delta(t) source and point-like detectors placed at different angles of detection are shown. To better quantify the agreement between the temporal profiles obtained from the two different methods of calculation, a fitting procedure based on the Levenberg-Marquardt algorithm has been implemented. Some examples on the retrieval of the optical properties for both the Monte Carlo and experimental data are presented. In the case of inhomogeneous cylindrical phantoms, some comparisons between the results of the time-domain 3D model of finite element method and 3D Monte Carlo are also shown.
本文对超短脉冲光在圆柱形散射和吸收体模内的传播进行了详细研究。展示了蒙特卡罗代码与扩散方程解析解之间的一些比较，其中源为δ(t)，点状探测器放置在不同探测角度。为了更好地量化从两种不同计算方法获得的时间分布之间的一致性，已实施基于列文伯格-马夸特算法的拟合程序。给出了一些从蒙特卡罗和实验数据中反演光学特性的示例。在非均匀圆柱形体模的情况下，还展示了有限元方法的时域三维模型结果与三维蒙特卡罗结果之间的一些比较。
