应用Monte Carlo法的X射线成像

应用科学学报 ›› 2009, Vol. 27 ›› Issue (5): 485-490.

应用Monte Carlo法的X射线成像

罗立民，教授，博导，研究方向：医学成像、科学可视化、图像分析、医学图像处理、立体定向放射治疗等，E-mail: Luo.list@seu.edu.cn

东南大学影像科学与技术实验室，南京210096

收稿日期:2009-05-27 修回日期:2009-08-20 出版日期:2009-09-25 发布日期:2009-09-25
通信作者: 沈傲东，博士生，研究方向：医学成像、图像处理、模式识别等，E-mail: shenaodong@gmail.com; 罗立民，教授，博导，研究方向：医学成像、科学可视化、图像分析、医学图像处理、立体定向放射治疗等
基金资助:
江苏省创新学者攀登项目基金(No.BK2009012)资助

Simulation of X-Ray Imaging Using Monte Carlo Method

Laboratory of Image Science and Technology, Southeast University, Nanjing 210096, China

Received:2009-05-27 Revised:2009-08-20 Online:2009-09-25 Published:2009-09-25

摘要/Abstract

摘要：

提出了一种新的X射线成像仿真方法用于模拟光子散射过程. 采用射线跟踪快速算法形成初级投影，并记录射线历经物体的属性. 沿射线方向根据光子散射概率选取光子散射点，用Monte Carlo法仿真光子散射，忽略无效的光子仿真计算. 实验结果表明，该算法与传统Monte Carlo仿真相比，可以在数分钟内达到相近的仿真效果.

关键词: 射线跟踪, Monte Carlo仿真, 光子散射, X射线成像

Abstract:

A novel method for simulating X-ray imaging is presented to describe scattering of photons. The initial projection is generated by a fast ray tracing technique. Properties of the object are recorded and traversed by the rays simultaneously. The scattering points are then picked along the ray direction based on probability of scattering,
neglecting the invalid photons. This is followed by Monte Carlo simulation for photon scattering. Experimental
results demonstrate that the presented method provides results within several minutes similar to that obtained with the conventional Monte Carlo algorithms.

Key words: ray tracing, Monte Carlo simulation, scattering of photons, X-ray imaging

中图分类号:

TP391

沈傲东;李兵;罗立民. 应用Monte Carlo法的X射线成像[J]. 应用科学学报, 2009, 27(5): 485-490.

SHEN Ao-dong, LI Bing, LUO Li-min. Simulation of X-Ray Imaging Using Monte Carlo Method[J]. Journal of Applied Sciences, 2009, 27(5): 485-490.