DocumentCode :
1072948
Title :
Performance studies of a depth encoding multicrystal detector for PET
Author :
Moisan, C. ; Tsang, G. ; Rogers, J.G. ; Hoskinson, E.M.
Author_Institution :
TRIUMF, Vancouver, BC, Canada
Volume :
43
Issue :
3
fYear :
1996
fDate :
6/1/1996 12:00:00 AM
Firstpage :
1926
Lastpage :
1931
Abstract :
The authors report the results of design studies for a multicrystal detector with the capacity to encode the Depth-Of-Interaction (DOI). These studies are based on a simulation that treats the interactions of γ-rays and tracks scintillation photons in state-of-the-art position encoding PET detectors. The simulation was used to study the impact of a simple modification to the standard surface treatment of the EXACT HR PLUS block that induces a significant sensitivity of the photopeak pulse height upon the DOI of 511 keV γ-rays. The depth resolution achieved with the altered block as well as the impact of the modification on its energy and position resolutions are presented. The results show a depth resolution of 6 to 7 mm for the inner crystals of the modified block. The center crystals show the largest increase in event position miscoding with 16% less encoding accuracy in the modified block compared to the original one
Keywords :
biomedical equipment; positron emission tomography; γ-ray interactions; 511 keV; EXACT HR PLUS block; depth encoding multicrystal detector; depth resolution; depth-of-interaction encoding; diagnostic nuclear medicine; encoding accuracy; energy resolution; event position miscoding; medical diagnostic imaging; medical instrumentation; photopeak pulse height; position resolution; Costs; Detectors; Encoding; Energy resolution; Fabrication; Face detection; Photonic crystals; Positron emission tomography; Spatial resolution; Surface treatment;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/23.507248
Filename :
507248
Link To Document :
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