| 锥束X-CT系统校准方法的实际应用分析 |
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| 引用本文： | 侯颖,孙怡.锥束X-CT系统校准方法的实际应用分析[J].CT理论与应用研究,2011,20(2):211-220. |
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| 作者姓名： | 侯颖 孙怡 |
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| 作者单位： | 大连理工大学信息与通信工程学院,大连,116023 |
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| 基金项目： | 国家自然科学基金项(60572110) |
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| 摘 要： | FDK算法是应用在锥束CT系统中最有代表性的重建算法之一,该算法是在假设CT成像系统满足理想成像关系的条件下得到的.然而实际的锥束CT成像系统很难完全满足理想成像关系的要求,系统的几何失配会极大影响重建图像的质量,因此必须在重建之前对成像系统进行校准,获得系统的几何失配参数,并在重建过程中修正几何失配参数造成的影响.本...
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| 关 键 词： | 锥束CT 校准 分析 |
Analysis on Application of Calibration Method for Cone-beam X-CT |
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| HOU Ying,SUN Yi.Analysis on Application of Calibration Method for Cone-beam X-CT[J].Computerized Tomography Theory and Applications,2011,20(2):211-220. |
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| Authors: | HOU Ying SUN Yi |
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| Institution: | HOU Ying,SUN Yi School of Information and Communication Engineering,Dalian University of Technology,Dalian 116023,China |
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| Abstract: | The FDK algorithm is a classic cone-beam approximate reconstruction algorithm,which has been widely used in practice.Ideal imaging geometry is a basic condition in the application of the FDK algorithm.However,it is difficult to satisfy this condition in a practical cone-beam CT system.Reconstructed images will suffer from artifacts caused by the misaligned geometry of the CT system.Therefore,calibration of the CT system in advance is an important and necessary task.Misaligned parameters of the CT system wil... |
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| Keywords: | cone-beam CT calibration analysis |
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