DocumentCode
1533917
Title
Compton scattering in a large-aperture positron imaging system
Author
McKee, B.T.A. ; Hogan, M.J. ; Howse, D.C.N.
Author_Institution
Dept. of Med. & Phys., Queen´´s Univ., Kingston, Ont., Canada
Volume
7
Issue
3
fYear
1988
fDate
9/1/1988 12:00:00 AM
Firstpage
198
Lastpage
202
Abstract
Compton scattering of gamma rays within the image volume has been assessed for a large-aperture positron-emission-tomography imaging system. The Compton scattered attenuation and the Compton scattered background were both modeled and measured for point sources centered in scattering spheres up to 10 cm in diameter. Good agreement was obtained between simulations and measurements. The attenuation problem is independent of the detector system, but its correction is more difficult in a large-aperture system. The scattered coincidence background is large in this system (43% for a 10-cm-diameter scattering sphere), but the background overlap is reduced with 3D imaging
Keywords
Compton effect; computerised tomography; radioisotope scanning and imaging; Compton scattering; gamma rays; large-aperture positron imaging system; nuclear medicine; point sources; Attenuation; Collimators; Gamma ray detection; Gamma ray detectors; Gamma rays; Geometry; High-resolution imaging; Optical imaging; Positron emission tomography; Scattering;
fLanguage
English
Journal_Title
Medical Imaging, IEEE Transactions on
Publisher
ieee
ISSN
0278-0062
Type
jour
DOI
10.1109/42.7782
Filename
7782
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