| 工业计算机断层成像系统转台旋转中心的确定 |
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| 引用本文： | 李保磊,傅健,魏东波,李俊江.工业计算机断层成像系统转台旋转中心的确定[J].航空动力学报,2009,24(7):1544-1548. |
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| 作者姓名： | 李保磊 傅健 魏东波 李俊江 |
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| 作者单位： | 北京航空航天大学机械工程及自动化学院,北京,100191 |
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| 基金项目： | 北京市教育委员会共建项目;;航空科学基金(20070951013);;航天科技创新基金(CASC0410);;国家自然科学基金(50875013;50575015) |
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| 摘 要： | 构建一个工业CT(computed tomography)成像系统,转台旋转中心的确定是非常关键的步骤,其定位误差会引起CT图像上的伪影.在详细分析了现存旋转中心确定方法不足的基础上,提出了一种新方法,该方法基于正弦图数据的冗余性,通过计算将正弦图数据总和均分的位置来定位旋转中心.相对现有算法,该方法无须使用模体,亦无需知晓任何几何参数,且基本不受随机噪声影响.实际的实验数据验证了该方法的有效性.
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| 关 键 词： | 工业CT(computed tomography) 旋转中心 正弦图 共轭投影 数据冗余 |
| 收稿时间： | 5/7/2008 12:00:00 AM |
| 修稿时间： | 2008/11/19 0:00:00 |
Determination of rotation center in industrial computed tomography system |
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| LI Bao-lei,FU Jian,WEI Dong-bo and LI Jun-jiang.Determination of rotation center in industrial computed tomography system[J].Journal of Aerospace Power,2009,24(7):1544-1548. |
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| Authors: | LI Bao-lei FU Jian WEI Dong-bo and LI Jun-jiang |
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| Institution: | School of Mechanical Engineering and Automation;Beijing University of Aeronautics and Astronautics;Beijing 100191;China |
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| Abstract: | The determination of the COR(center of the rotation) of the rotating table is a key step to set up an industrial computed tomography system.The error of the COR can lead to artifacts in CT(computed tomography) image.The current popular methods about COR determination were described and their disadvantages were presented.Based on the analysis,one novel method was put forward.The proposed algorithm was based on the redundancy character of sinogram,and the COR was located by calculating the position at which t... |
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| Keywords: | industrial computed tomography center of rotation sinogram conjugate projection data redundancy |
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