| 基于C型臂的有限角锥形束三维重建算法 |
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| 引用本文： | 王丽艳,罗守华,韦志辉.基于C型臂的有限角锥形束三维重建算法[J].CT理论与应用研究,2008,17(4):1-7. |
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| 作者姓名： | 王丽艳 罗守华 韦志辉 |
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| 作者单位： | [1]东南大学数学系,南京211189 [2]东南大学生物医学工程系,南京211189 [3]南京理工大学计算机科学与技术系,南京210094 |
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| 基金项目： | 国家937项目（2006CB601201）. |
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| 摘 要： | 本文提出了一种基于C型臂的有限角锥形束三维重建迭代算法，针对C型臂的几何结构给出了相应的FDK算法的表达，在迭代外推的过程中恰当地加入了非负、有界、投影数据质量守恒等先验知识以及相邻角度的投影数据保持一定的光滑性这一正则化准则。实验结果表明，这种新方法能较好地消除条状伪影，并能显著提高重建图像的对比度。
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| 关 键 词： | 有限角度 三维重建 锥形束 正则化 |
A New 3D Iterative Reconstruction Algorithm for C-Arm Imaging Systems from Limited- Angle Cone Beam Projections |
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| Institution: | WANG Li-yan, LUO Shou-hua, WEI Zhi-hui(1. a. Department of Mathematics, b. Department of biomedical engineering, Southeast University, Nanjing 211189, China 2. Department of Computer Science, Nanjing University of Science ＆ Technology, Nanjing 210094, China) |
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| Abstract: | In this paper, a new 3D iterative reconstruction algorithm for C-arm imaging systems from limited-angle of cone beam projections was proposed. The well-known FDK algorithm was adapted for C-arm imaging systems. Our approach was to introduce prior knowledge and regularizations （such as non negative, limited support） into iterativ~ procedure. Experiments show that by our method, the streak artifacts can be greatly suppressed and the contrast can be significantly improved. |
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| Keywords: | limited-angle 3D reconstruction cone beam regularization |
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