| Tomography Reconstruction with Noisy Projection Data |
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| 引用本文： | LI Xide (Department of Engineering Mechanics,Tsinghua University,Beijing 100084,China). Tomography Reconstruction with Noisy Projection Data[J]. Chinese Journal of Lasers, 2000, 9(3): 275-281 |
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| 作者姓名： | LI Xide (Department of Engineering Mechanics Tsinghua University Beijing 100084 China) |
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| 作者单位： | Department of Engineering Mechanics，Tsinghua University，Beijing 100084，China |
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| 基金项目： | SupportedbytheNationalNaturalScienceFoundationofChina (Grant 195 0 2 0 13)andFLMFoundationofTsinghuaUniversity |
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| 摘 要： | 1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｃｏｍｐｕｔｅｒｉｚｅｄｔｏｍｏｇｒａｐｈｙｉｓｏｎｅｏｆｔｈｅｍｏｓｔｅｆｆｅｃｔｉｖｅｔｅｃｈｎｉｑｕｅｓｉｎｔｈｒｅｅｄｉｍｅｎｓｉｏｎｒｅｃｏｎｓｔｒｕｃｔｉｏｎ,ｗｈｉｃｈｎｅｅｄｓｐｒｏｊｅｃｔｉｏｎｓｉｎｖａｒｉｏｕｓｖｉｅｗｉｎｇｄｉｒｅｃｔｉｏｎｓｃｏｖｅｒｉｎｇ180.Ｇｅｎｅｒａｌｌｙ,ｔｈｅｓｅｐｒｏｊｅｃｔｉｏｎｓａｒｅａｓｅｔｏｆｌｉｎｅｉｎｔｅｇｒａｌｓｏｆｔｈｅａｂｓｏｒｐｔｉｏｎｃｏｅｆｆｉｃｉｅｎｔｓ(ｅ.ｇ.ｉｎｍｅｄｉｃａｌｄｉａｇｎ…
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| 收稿时间： | 1999-03-15 |
Tomography Reconstruction with Noisy Projection Data |
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| LI Xide. Tomography Reconstruction with Noisy Projection Data[J]. 中国激光(英文版), 2000, 9(3): 275-281 |
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| Authors: | LI Xide |
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| Abstract: | Computerized tomography (CT) based on the convolution back p rojection method has been regarded as an important reconstruction method, but it is not suitable to noisy conditions. In this paper, techniques of filtering, resampling and frequency shifting have been introduced to enhance the quality of CT reconstruction and improved results have been obtained. |
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| Keywords: | computerized tomography convolution back projection reconstruction filtering sampling frequency shifting |
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