CT系统的能谱估计及射束硬化校正算法

基金项目:

国家自然科学基金资助

详细信息

Estimation of Energy Spectra of CT System And Beam-Hardening Correction Algorithm

1. Department of Mathematics, Northwest University, ChinaXi’an 710069; 2. Division of Applied Mathematics, Beijing Information Technology Institute, China Beijing 100101

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。
- 计算机层析成像 /
- 能谱估计 /
- 射束硬化校正 /
- 牛顿迭代法
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.
- computed tomography /
- spectra estimation /
- beam-hardening correction /
- Newtons iteration method