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Modelling the penumbra in computed tomography

Abstract:

Background

In computed tomography (CT), the spot geometry is one of the main sources of error in CT images. Since X-rays do not arise from a point source, artefacts are produced. In particular there is a penumbra effect, leading to poorly defined edges within a reconstructed volume. Penumbra models can be simulated given a fixed spot geometry and the known experimental setup.

Objective

This paper proposes to use a penumbra model, derived from Beer’s law, both to c...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Files:
Publisher copy:
10.3233/XST-160576

Authors


Warnett, JM More by this author
Gibbons, GJ More by this author
Brettschneider, J More by this author
More by this author
Institution:
University of Oxford
Division:
Medical Sciences Division
Department:
Nuffield Dept of Population Health
Subgroup:
Clinical Trial Service Unit
ORCID:
0000-0002-4516-5103
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Publisher:
IOS Press Publisher's website
Journal:
Journal of X-ray Science and Technology Journal website
Volume:
24
Issue:
4
Pages:
583-597
Publication date:
2016-07-20
Acceptance date:
2016-04-10
DOI:
EISSN:
1095-9114
ISSN:
0895-3996
Pubs id:
pubs:908846
URN:
uri:edfccf1e-8669-4c58-bc69-dfb0085ff5e9
UUID:
uuid:edfccf1e-8669-4c58-bc69-dfb0085ff5e9
Local pid:
pubs:908846

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