| X-CT有限角投影图像重建的截断奇异函数分析法 |
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| 引用本文： | 骆建华,姚敏,楼正国,庄天戈.X-CT有限角投影图像重建的截断奇异函数分析法[J].电子学报,2000,28(7):88-90. |
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| 作者姓名： | 骆建华 姚敏 楼正国 庄天戈 |
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| 作者单位： | 1. 上海交通大学生医系,上海 200030,;2. 浙江大学计算机系,杭州 310028,;3. 浙江大学生医系,杭州 310027 |
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| 基金项目： | 国家自然科学基金!(No.39870 2 1 1和No.39970 2 1 9) |
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| 摘 要： | 本文提出一种新的X-CT截断投影数据图像重建方法.本文的方法是从采集到的X-CT有限角截断投影数据中提取用于重建图像的特征信息,并用这些特征信息构造截断奇异函数,再由这些截断奇异函数的线性泛函来重构X-CT图像,达到消除X-CT有限角投影数据图像重建中的截断伪影之目的.实际和模拟结果都表明这种方法效果高于现有方法.
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| 关 键 词： | 截断奇异函数 奇异点 有限角投影数据 |
| 收稿时间： | 1999-11-25 |
X-CT Image Reconstruction from Finite Angle Project Data Using Truncated Singularity Function Analysis |
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| LUO Jian-hua,YAO Min,LOU Zheng-guo,ZHUANG Tian-ge.X-CT Image Reconstruction from Finite Angle Project Data Using Truncated Singularity Function Analysis[J].Acta Electronica Sinica,2000,28(7):88-90. |
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| Authors: | LUO Jian-hua YAO Min LOU Zheng-guo ZHUANG Tian-ge |
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| Institution: | 1. Biomedical Engineering Dept,Shanghai Jiaotong University,Shanghai 200030,China;2. Dept of Computer,Zhejiang University,Hangzhou 310028,China;3. Biomedical Engineering Dept,Zhejiang University,Hangzhou 310027,China; |
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| Abstract: | In this paper,we present a new method on X-CT image reconstruction from finite angle projections data.In this way, firstly characteristic parameters are extrac ted from X-CT finite angle project data,then some truncated singularity functi ons are constructed using those characteristic parameter,and finally X-CT image s are reconstructed by those truncated singularity functions.Thus non truncated artifacts X-CT image from finite angle project data can be gained.Experimental and simulated results show that this method gives much better reconstructed ima ge than available methods. |
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| Keywords: | truncated singularity function singularity points truncated spectrum |
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