| 基于CT数据一致性的双多项式射束硬化校正改进 |
| |
| 引用本文： | 张砚博,汤少杰,牟轩沁ⅱ.基于CT数据一致性的双多项式射束硬化校正改进[J].光子学报,2009,38(8). |
| |
| 作者姓名： | 张砚博 汤少杰 牟轩沁ⅱ |
| |
| 作者单位： | 西安交通大学,图像处理与模式识别研究所,西安,710049 |
| |
| 基金项目： | 国家自然科学基金，教育部新世纪优秀人才支持计划 |
| |
| 摘 要： | 针对目前各种校正算法对条状伪影校正效果不显著,分析了条状伪影的产生原因.由此考虑射线穿过不同骨厚度对软组织投影贡献的影响,对基于H-L一致性条件的双多项式校正算法的软组织校正多项式改进.Forbild头部模体的仿真结果表明,该改进方法对杯状伪影和条状伪影都有良好的校正效果.
|
| 关 键 词： | 射束硬化 H-L一致性条件 多项式校正 条状伪影 |
Improvement of Bi-polynomial Method for Beam Hardening Correction Based on Consistency of CT Data |
| |
| ZHANG Yan-bo,TANG Shao-jie,MOU Xuan-qin.Improvement of Bi-polynomial Method for Beam Hardening Correction Based on Consistency of CT Data[J].Acta Photonica Sinica,2009,38(8). |
| |
| Authors: | ZHANG Yan-bo TANG Shao-jie MOU Xuan-qin |
| |
| Institution: | Institute of Image Processing & Pattern Recognition;Xi'an Jiaotong University;Xi'an 710049 |
| |
| Abstract: | Due to all kinds of correction algorithms have little effects on streak artifact at present,the reason of streak artifact is analyzed.Therefore,considering that the influence of soft tissue caused by the X-rays which penetrate through different bone thicknesses are different,the soft tissue correction polynomial in Bi-Polynomial correction method is improved based on H-L consistency condition.Forbild head phantom simulation results show that the improved algorithm can get better correction effect on both cu... |
| |
| Keywords: | Beam hardening H-L consistency Polynomial correction Streak artifact |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
