Study of “A method to enhance coincidence time resolution with applications for medical imaging systems (TOF/PET)”

The physics of true coincidence production by the Cs-137 source is elaborated. When the single-photon emitting Cs-137 source is sandwiched between two detectors of a coincidence system, the scattering of 662 keV gamma-rays between the detectors (“cross-talk”) will result in true coincidence events....

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Bibliographic Details
Published in:Radiation measurements 2015-01, Vol.72, p.95-99
Main Authors: Bikit, I., Mrdja, D., Bikit, K., Slivka, J., Forkapic, S.
Format: Article
Language:English
Subjects:
Coincidence timing
Detectors
Emittance
Gamma-ray backscattering
Medical imaging
Monte-Carlo simulations
Positron emission
Radiation measurement
Scattering
Simulation
Tomography
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Summary:The physics of true coincidence production by the Cs-137 source is elaborated. When the single-photon emitting Cs-137 source is sandwiched between two detectors of a coincidence system, the scattering of 662 keV gamma-rays between the detectors (“cross-talk”) will result in true coincidence events. The results of Ermis et al. (2014) on that issue are critically analyzed. Our Geant-4 simulations did not support most of the results of this work. Thus, the possibility of coincidence time resolution improvement by the Cs-137 source is challenged. •The coincidence events by a non-cascade gamma source are described.•GEANT4 simulations of the cross talk between detectors have been performed.•The feasibility of the Cs-137 source application for timing studies is explored.
ISSN:1350-4487
1879-0925
DOI:10.1016/j.radmeas.2014.12.004