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
中科院分区:
文献类型:
--
作者:
Frikel, Juergen;Quinto, Eric Todd
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.