Inclusion of coherence in Monte Carlo models for simulation of x-ray phase contrast imaging
Inclusion of coherence in Monte Carlo models for simulation of x-ray phase contrast imaging
复制标题
DOI：
10.1364/oe.22.023480
复制
发表时间：
2014-09-22
期刊：
影响因子：
3.8
通讯作者：
Jaroszynski, Dino A.
中科院分区：
文献类型：
--
作者：
Cipiccia, Silvia;Vittoria, Fabio A.;Jaroszynski, Dino A.
最近，人们对基于电磁波相干性的相衬成像方法的兴趣显着增加，特别是在 X 射线能量方面。这引发了对有效模拟方法的需求。相干成像方法通常基于波动光学，这需要大量的计算资源，特别是在生成 2D 图像时。蒙特卡罗 (MC) 方法用于跟踪粒子物理学中的单个粒子/光子，但不适合描述相干效应。先前的初步工作评估了将一致性纳入蒙特卡洛代码的可能性。 However, in this paper, we present the implementation of refraction in a model that is based on time of flight calculations and the Huygens-Fresnel principle, which allow reproducing the formation of phase contrast images in partially and fully coherent experimental conditions.该模型在 FLUKA 蒙特卡罗代码中实现，并将 X 射线相衬成像模拟与实验和波动光学计算进行比较。 (C) 2014年美国光学学会
Interest in phase contrast imaging methods based on electromagnetic wave coherence has increased significantly recently, particularly at X-ray energies. This is giving rise to a demand for effective simulation methods. Coherent imaging approaches are usually based on wave optics, which require significant computational resources, particularly for producing 2D images. Monte Carlo (MC) methods, used to track individual particles/photons for particle physics, are not considered appropriate for describing coherence effects. Previous preliminary work has evaluated the possibility of incorporating coherence in Monte Carlo codes. However, in this paper, we present the implementation of refraction in a model that is based on time of flight calculations and the Huygens-Fresnel principle, which allow reproducing the formation of phase contrast images in partially and fully coherent experimental conditions. The model is implemented in the FLUKA Monte Carlo code and X-ray phase contrast imaging simulations are compared with experiments and wave optics calculations. (C) 2014 Optical Society of America