Characterization and reduction of artifacts in limited angle tomography

Characterization and reduction of artifacts in limited angle tomography
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DOI:
10.1088/0266-5611/29/12/125007
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发表时间:
2013-12-01
期刊:
影响因子:
2.1
通讯作者:
Quinto, Eric Todd
Quinto, Eric Todd
中科院分区:
数学2区
文献类型:
--
作者:
Frikel, Juergen;Quinto, Eric Todd

文献摘要

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我们考虑有限角度层析重建问题,使用滤波反投影(FBP)和λ层析。我们使用微局部分析来解释为什么众所周知的条纹文物存在于有限的角度范围的结束。我们解释了如何减轻条纹,并证明我们修改后的FBP和lambda运算符是标准的伪微分运算符,因此它们不会添加伪影。我们提供重建来说明我们的数学结果。
We consider the reconstruction problem for limited angle tomography using filtered backprojection (FBP) and lambda tomography. We use microlocal analysis to explain why the well-known streak artifacts are present at the end of the limited angular range. We explain how to mitigate the streaks and prove that our modified FBP and lambda operators are standard pseudodifferential operators, and so they do not add artifacts. We provide reconstructions to illustrate our mathematical results.