DocumentCode
848814
Title
Corrections for Attenuation, Scattered Radiation, and Random Coincidences in a Ring Detector Positron Emission Transaxial Tomograph
Author
Bergstrom, M ; Bohm, C. ; Ericson, K ; Eriksson, L. ; Litton, J.
Author_Institution
Departments of Neuroradiology and Neurophysiology, Karolinska Hospital, Department of Radiation Physics, Karolinska Institute, and Department of Physics, University of Stockholm, Stockholm, Sweden
Volume
27
Issue
1
fYear
1980
Firstpage
549
Lastpage
554
Abstract
The effect of attenuation, scattered radiation and random coincidences were evaluated in a positron camera with 95 NaI-detectors. Experimental tests and computer simulations were performed to find the contribution of the various effects to the number of counts in each detector channel. Images were then reconstructed with and without corrections for the different factors and the errors in the images were quantified. It is shown that accurate quantitative measurements of regional concentration of radionuclides necessitate a proper correction for the different factors.
Keywords
Attenuation; Cameras; Computer simulation; Image reconstruction; Performance evaluation; Positrons; Radiation detectors; Radioactive decay; Scattering; Testing;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1980.4330887
Filename
4330887
Link To Document