| 可同时抑制多种图像伪影的最优骨校正 |
| |
| 引用本文： | 汤少杰,张砚博,汪友明,赵峰,乔志伟,杨小军,牟轩沁,朱溢佞.可同时抑制多种图像伪影的最优骨校正[J].CT理论与应用研究,2018,27(3):301-314. |
| |
| 作者姓名： | 汤少杰 张砚博 汪友明 赵峰 乔志伟 杨小军 牟轩沁 朱溢佞 |
| |
| 作者单位： | 1. 西安邮电大学自动化学院, 西安 710121; |
| |
| 基金项目： | 西邮新星团队基金，西北工业大学现代设计与集成制造教育部重点实验室(KF201401)，东南大学计算机网络与信息集成教育部重点实验室(K93-9-2017-03)，陕西省教育厅(15JK1673)，陕西省科技厅(2016JM8034)，国家自然科学基金(61501310) |
| |
| 摘 要： | X线CT系统球管发射宽能谱X光子，使得重建图像中出现射束硬化伪影，如杯形和条纹伪影；成像对象体内还可能存在金属植入物，使得重建图像中出现金属伪影。多种图像伪影的同时出现，势必严重退化临床诊断精度，有必要深入研究加以抑制。本文利用数据一致性条件构造目标函数；利用非线性最小二乘和交替迭代优化算法求解最优尺度因子；最终得到可同时校正杯形、条纹和金属伪影的最优骨校正方法。计算机仿真实验结果表明，该方法的确能够自适应确定出最优尺度因子，从而同时校正多种图像伪影。
|
| 关 键 词： | X线CT 射束硬化 一致性条件 |
| 收稿时间： | 2018-03-15 |
An Optimal Bone Correction Capable of Simultaneously Suppressing Various Types of Image Artifacts |
| |
| TANG Shao-jie,ZHANG Yan-bo,WANG You-ming,ZHAO Feng,QIAO Zhi-wei,YANG Xiao-jun,MOU Xuan-qin,ZHU Yi-ning.An Optimal Bone Correction Capable of Simultaneously Suppressing Various Types of Image Artifacts[J].Computerized Tomography Theory and Applications,2018,27(3):301-314. |
| |
| Authors: | TANG Shao-jie ZHANG Yan-bo WANG You-ming ZHAO Feng QIAO Zhi-wei YANG Xiao-jun MOU Xuan-qin ZHU Yi-ning |
| |
| Abstract: | Tube of X-ray CT system emitting a polychromatic spectrum of photons leads to beam hardening artifacts such as cupping and streaks, while the metal implants in the imaged object results in metal artifacts in reconstructed images. The simultaneous emergence of various types of image artifacts certainly will degrade the diagnostic accuracy in clinics, and so should be deeply researched for suppressing them. In this paper, data consistency condition is exploited to construct an objective function. Nonlinear least square and alterative iteration algorithms are used to solve the optimal scaling factors. Finally, an optimal bone correction approach is acquired to simultaneously correct for cupping, streaks and metal artifacts. Experimental result acquired by a computer simulation demonstrates that the proposed approach can really adaptively determine the optimal scaling factors, and then correct for various types of image artifacts at the same time. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《CT理论与应用研究》浏览原始摘要信息 |
|
点击此处可从《CT理论与应用研究》下载全文 |
|
