宏观响应蒙特卡罗方法在电子能谱模拟中的应用
Application of Macro Response Monte Carlo method for electron spectrum simulation
摘要：
在过去的几年中，几个方差减少技术的蒙特卡罗电子输运已被开发，以减少电子计算时间传输的吸收剂量分布。我们已经实现了宏观响应蒙特卡罗（MRMC）方法来评估的电子光谱，可以用作相空间输入的其他模拟程序。这种技术使用了以前在球体中模拟的电子历史的概率分布（称为kugels）。这些概率被用来对初级电子的最终状态以及产生的次级电子和光子进行采样。我们比较了MRMC电子光谱模拟均匀的幻影对Geant 4光谱。结果表明，协议优于6%的谱峰能量和MRMC代码是高达12倍的速度比Geant 4模拟。
英文摘要：
During the past years several variance reduction techniques for Monte Carlo electron transport have been developed in order to reduce the electron computation time transport for absorbed dose distribution. We have implemented the Macro Response Monte Carlo (MRMC) method to evaluate the electron spectrum which can be used used as a phase space input for others simulation programs. Such technique uses probability distributions for electron histories previously simulated in spheres (called kugels). These probabilities are used to sample the primary electron final state, as well as the creation secondary electrons and photons. We have compared the MRMC electron spectra simulated in homogeneous phantom against the Geant4 spectra. The results showed an agreement better than 6% in the spectra peak energies and that MRMC code is up to 12 times faster than Geant4 simulations.
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