CT理论与应用研究2011，Vol.20Issue(2)：153-162,10.
双能CT成像基材料分解法的理论误差分析
Methodic Error Analysis of Basis Material Decomposition Method in Dual-Energy Computed Tomography
摘要
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. We give the applicable conditions of this method. In general, this method leads to a small error for low-Z materials and a large error for high-Z materials.关键词
DECT/基材料分解法/物质辨别/理论误差/金属伪影Key words
DECT/ basis material decomposition method/ material discrimination/ methodic error/ metal artifact分类
信息技术与安全科学引用本文复制引用
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):153-162,10.基金项目
国家自然科学基金(60772051). （60772051）
