| 双能CT成像基材料分解法的理论误差分析 |
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| 引用本文： | 郑鹏,郝佳,邢宇翔.双能CT成像基材料分解法的理论误差分析[J].CT理论与应用研究,2011,20(2):153-162. |
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| 作者姓名： | 郑鹏 郝佳 邢宇翔 |
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| 作者单位： | 清华大学工程物理系,北京,100084 |
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| 基金项目： | 国家自然科学基金(60772051) |
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| 摘 要： | 双能X射线计算机断层成像技术(DECT)能够准确地重建物质的有效原子序数和电子密度信息,是一种有效的物质辨别技术.基材料分解法是求解DECT重建问题的主要方法之一.但目前应用此方法得到的重建结果误差较大,并且对于金属伪影抑制能力也较差.本文分析了DECT基材料分解法重建结果的误差来源和形成机制,阐释了其对金属伪影抑制作...
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| 关 键 词： | DECT 基材料分解法 物质辨别 理论误差 金属伪影 |
Methodic Error Analysis of Basis Material Decomposition Method in Dual-Energy Computed Tomography |
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| ZHENG Peng,HAO Jia,XING Yu-xiang.Methodic Error Analysis of Basis Material Decomposition Method in Dual-Energy Computed Tomography[J].Computerized Tomography Theory and Applications,2011,20(2):153-162. |
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| Authors: | ZHENG Peng HAO Jia XING Yu-xiang |
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| Institution: | ZHENG Peng,HAO Jia,XING Yu-xiang(Department of Engineering Physics,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Dual-energy computed tomography(DECT)can be used for computing atomic number and electron density.As a result,we can discriminate unknown materials.One approach to deal with DECT is by basis material decomposition method.However,this method leads to a large error and bad suppression of metal artifact.This paper focuses on methodic error analysis of basis material decomposition method.Reasons for bad suppression of metal artifact are explained.Also,this paper derived the theoretical formula of methodic error... |
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| Keywords: | DECT basis material decomposition method material discrimination methodic error metal artifact |
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