DocumentCode :
2556021
Title :
Modeling of 3D gamma interaction position in a monolithic scintillator block with a row-column summing readout
Author :
Bonifacio, Daniel A. B. ; Moralles, Mauricio
Author_Institution :
Inst. of Phys., Univ. of Sao Paulo, Sao Paulo, Brazil
fYear :
2012
fDate :
Oct. 27 2012-Nov. 3 2012
Firstpage :
2606
Lastpage :
2613
Abstract :
Current positron emission tomography (PET) systems have their detector design based on discrete scintillation crystals. Spatial resolution of these systems are directly related with the size of the crystal segments. On the other hand, cost and complexity increase considerably as the size of the crystal segments decreases. Detector design with continuous scintillator is another approach that improves the energy resolution and sensitivity without degrading the spatial resolution. In this work, we report a method to determine the gamma interaction position with depth of interaction (DOl) capability inside a monolithic crystal coupled to a photodetector array. The method is based on estimating parameters of a model which describes the signal distribution of the optical photons collected by the photodetector array in a row-column summing readout scheme. Evaluation data were simulated using the GATE framework (Geant4 Application for Emission Tomography) to characterize the detector and to compare the interaction position of the incident gamma with the position registered by the detector.
Keywords :
gamma-ray detection; photodetectors; positron emission tomography; readout electronics; scintillation counters; 3D gamma interaction position; DOl capability; GATE framework; Geant4 application for emission tomograph framework; PET systems; crystal segments; depth of interaction capability; discrete scintillation crystals; interaction position; monolithic scintillator block; optical photons; parameter estimation; photodetector array; positron emission tomography systems; row-column summing readout; spatial resolution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE
Conference_Location :
Anaheim, CA
ISSN :
1082-3654
Print_ISBN :
978-1-4673-2028-3
Type :
conf
DOI :
10.1109/NSSMIC.2012.6551596
Filename :
6551596
Link To Document :
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