锥束X射线CT投影的蒙特卡罗仿真

闫浩; 牟轩沁; 罗涛; 汤少杰

您当前的位置：

首页 >

文章列表页 >

锥束X射线CT投影的蒙特卡罗仿真

专题研究 | 更新时间：2025-12-08

- 锥束X射线CT投影的蒙特卡罗仿真
- Monte Carlo Simulation of Cone-Beam X-Ray Computer Tomography Projection
- 西安交通大学学报 2008年42卷第4期页码：414-417+422
- 作者机构：
  
  西安交通大学图像处理与模式识别研究所,西安,710049
- 作者简介：
- 基金信息：
  
  : 2007-08-07. 作者简介: 闫浩(1980-),男,博士生;牟轩沁(联系人),男,教授,博士生导师. 基金项目: 国家自然科学基金资助项目(60551003,60472004), 教育部新世纪优秀人才支持计划资助项目(NCET-05-0828)
- DOI：
  中图分类号： R811.1;TP391.4
- 网络首发：2008-04-10，
  
  纸质出版：2008
- 稿件说明：
移动端阅览
闫浩, 牟轩沁, 罗涛, 等. 锥束X射线CT投影的蒙特卡罗仿真[J]. 西安交通大学学报, 2008,42(4):414-417+422.

闫浩, 牟轩沁, 罗涛, et al. Monte Carlo Simulation of Cone-Beam X-Ray Computer Tomography Projection[J]. 2008, 42(4): 414-417+422.
闫浩, 牟轩沁, 罗涛, 等. 锥束X射线CT投影的蒙特卡罗仿真[J]. 西安交通大学学报, 2008,42(4):414-417+422. DOI：

闫浩, 牟轩沁, 罗涛, et al. Monte Carlo Simulation of Cone-Beam X-Ray Computer Tomography Projection[J]. 2008, 42(4): 414-417+422. DOI：

摘要

提出了一种锥束X射线CT(计算机断层扫描)投影的蒙特卡罗计算方法

对X光子逐次抽样并以随机步长跟踪

将探测器区域内的沉积能量转化为投影信号

使用蒙特卡罗计算工具EGSnrc执行后台批处理计算

得到符合成像物理学的仿真投影.经过合理加速和参数优化

计算量较通用默认设置降低了2个数量级.对生成的锥束投影进行重建

结果显示出预期的射束硬化和散射伪影.该方法易于进行二次开发

贴近真实设备

是锥束X射线CT原型机散射校正的基础.将仿真投影与真实的物理设备测量数据进行比较

平均误差为1.18%.

Abstract

A Monte Carlo simulation method of cone-beam X-ray computer tomography(X-CT)projection is presented. X-ray photons are sampled in series and traced with random discrete steps. Projection signals are obtained from deposited energy in the detector zone. Simulations in accordance with imaging physics are generated by adopting the Monte Carlo toolkit EGSnrc

which is batch-programmed for background calculation. In contrast with the commonly used default settings

acceleration investigation and parameters optimization lead to a decreasing in simulation time around 100 times. As expected

beam-hardening and scattering artifacts are revealed in the images reconstructed from the simulated projection. The method is convenient for further developing and can be the basis of researches in the scatter correction upon cone-beam X-CT prototype. Compared with the data measured from real machines

this method is validated with 1.18% error.

关键词

Keywords

references

汤少杰,牟轩沁,闫浩. 基于医学X射线成像物理模型的模体投影仿真计算[J]. 西安交通大学学报, 2006, 40(8): 901-905.

TANG Shaojie, MOU Xuanqin, YAN Hao, Simulation calculation of phantom projections based on physics model of medical X-ray imaging [J].Journal of Xi'an Jiaotong University, 2006, 40(8): 901-905.

TANG Shaojie, YU Hengyong, YAN Hao, et al. X-ray projection simulation based on physical imaging model [J]. Journal of X-Ray Science and Technology,2006, 14(3): 177-189.

BOONE J M. COOPER V N. Scatter/primary in mammography:Monte Carlo validation [J]. Med Phys, 2000,27(8): 1818-1831.

COLIJN A P, ZBIJEWSKI W, SASOV A, et al. Experimental validation of a rapid Monte Carlo based micro-CT simulator [J]. Phys Med Biol, 2004,49(18): 4321-4333.

MOHAMMAD R A, ZAIDI H. Development and validation of MCNP4C-based Monte Carlo simulator for fan-and cone-beam X-ray CT [J].Phys Med Biol,2005, 50(20): 4863-4885.

许淑燕.蒙特卡罗方法在实验核物理中的应用 [M]. 北京:原子能出版社,1996.

KAWRAKOW I, ROGERS D W O, The EGSnrc code system: Monte Carlo simulation of electron and photon transport, NRCC report PIRS-701 [EB/OL].[2007-02-13].http:∥www.irs.inms.nrc.ca/EGSnrc/pirs701/index.html.

KAWRAKOW I. Bibliography of EGS related papers [EB/OL].[2005-01-12]. http:∥www.irs. inms.nrc.ca/papers/egs.biblio/nodel.html.

FEWELL T R,SHUPING R E, HAWKINS K R,et al. Handbook of computed tomography X-ray spectra [M].Washington D.C., USA:HHS Publication, 1981.

SCHNEIDER W, BORTFELD T, SCHLEGEL W. Correlation between CT numbers and tissue parameters needed for Monte Carlo simulations of clinical dose distributions [J]. Phys Med Biol, 2000, 45(2): 459-478.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

离子液体改性燃料的电流体动力学效应研究

融合物理信息与深度算子网络的变压器绕组热-流场快速计算方法

电子级超纯氮深冷空分流程节能优化研究

张角凹坑气膜孔对双层壁气膜冷却特性的影响

采用试验设计方法的第三代CO2气体箔轴承箔片几何参数敏感性分析