| 基于蒙特卡罗法的三源锥束CT散射分析 |
| |
| 引用本文： | 阳振宇,吕杨,赵俊.基于蒙特卡罗法的三源锥束CT散射分析[J].CT理论与应用研究,2012,21(1):1-9. |
| |
| 作者姓名： | 阳振宇 吕杨 赵俊 |
| |
| 作者单位： | 上海交通大学生物医学工程系,上海,200240 |
| |
| 基金项目： | 973项目，国家自然科学基金 |
| |
| 摘 要： | 在医用X-CT中,散射现象对重建图像的质量有重要的影响。多源锥束CT是医用CT的一种发展趋势,可成倍提高时间分辨率。但与单源CT相比,多源CT额外的光源会导致散射现象的加重,因此在实际应用中需要着重考虑这一问题。本文在开源工具EGSnrc的基础上,开发了一套基于蒙特卡罗法的CT仿真软件SimProj,用该软件获得了贴近...
|
| 关 键 词： | 蒙特卡罗 X线 三源锥束CT 散射 EGSnrc |
Analysis of Scattering in Triple-source Cone-beam CT Based on Monte Carlo Method |
| |
| YANG Zhen-yu,LV Yang,ZHAO Jun.Analysis of Scattering in Triple-source Cone-beam CT Based on Monte Carlo Method[J].Computerized Tomography Theory and Applications,2012,21(1):1-9. |
| |
| Authors: | YANG Zhen-yu LV Yang ZHAO Jun |
| |
| Institution: | Department of Biomedical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China |
| |
| Abstract: | The scattering has serious influence on the image quality in X-ray CT.Multi-source CT is a trend of future CT system since it can significantly improve the temporal resolution.However,as the number of sources increases,more scattered radiation will occur.The scattering issue should be taken into consideration in the practical applications.A CT simulation software,SimProj,has been developed based on the open source tool EGSnrc to generate cone-beam projections which approach the real data.Reconstructed images from the simulated data show scattering induced artifacts as expected.The analysis results are important and helpful for the optimization of designing and manufacturing of triple-source cone-beam CT. |
| |
| Keywords: | Monte Carlo X-ray triple-source cone-beam CT scattering EGSnrc |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
