| CT系统的能谱估计及射束硬化校正算法 |
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| 引用本文： | 叶侠娟,张朋.CT系统的能谱估计及射束硬化校正算法[J].CT理论与应用研究,2003,12(2):10-15. |
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| 作者姓名： | 叶侠娟 张朋 |
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| 作者单位： | 1. 西北大学数学系,中国陕西710069
2. 北京信息工程学院应用数学研究室,中国北京100101 |
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| 摘 要： | 本文给出对CT系统X射线能谱的估计算法和单成分被测物体CT成像的射束硬化校正算法，并给出和分析了数值模拟结果。
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| 关 键 词： | 计算机层析成像 能谱估计 射束硬化校正 牛顿迭代法 |
| 文章编号： | 1004-4140(2003)02-0010-06 |
| 修稿时间： | 2003年4月18日 |
Estimation of Energy Spectra of CT System And Beam-Hardening Correction Algorithm |
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| Abstract: | The authors present an algorithm which can estimate, by means of a standard cylinder or wedge model, the energy spectra of the CT system and the mass attenuation coefficient of the model at the same time. An algorithm on beam-hardening correction of CT image for single material object is presented as well. The simulation results show that the algorithm for estimation of the energy spectra can give a reasonable estimation of the energy spectra, and that beam-hardening correction algorithm is more precise than polynomial approximation correction algorithm and more rapid than common iterative algorithm. |
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| Keywords: | computed tomography spectra estimation beam-hardening correction Newtons iteration method |
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