Title :
A model of the high count rate performance of NaI(Tl)-based PET detectors
Author :
Wear, James A. ; Karp, Joel S. ; Freifelder, Richard ; Mankoff, David A. ; Muehllehner, Gerd
Author_Institution :
Dept. of Radiol., Pennsylvania Univ., Philadelphia, PA, USA
Abstract :
A detailed model of the response of large-area NaI(Tl) detectors used in PET and their triggering and data acquisition electronics has been developed. This allows the authors to examine the limitations of the imaging system´s performance due to degradation in the detector performance from light pile-up and deadtime from triggering and event processing. Comparisons of simulation results to measurements from the HEAD PENN-PET scanner have been performed to validate the Monte Carlo model. The model was then used to predict improvements in the high count rate performance of the HEAD PENN-PET scanner using different signal integration times, light response functions, and detectors
Keywords :
Monte Carlo methods; biomedical equipment; gamma-ray detection; modelling; positron emission tomography; sodium compounds; solid scintillation detectors; thallium; Monte Carlo model validation; NaI(Tl)-based PET detectors; NaI:Tl; data acquisition electronics; deadtime; event processing; high count rate performance; light pile-up; light response functions; medical diagnostic imaging; medical instrumentation; nuclear medicine; signal integration time; triggering electronics; Data acquisition; Degradation; Detectors; Event detection; Head; Monte Carlo methods; Performance evaluation; Positron emission tomography; Predictive models; System performance;
Conference_Titel :
Nuclear Science Symposium, 1997. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
0-7803-4258-5
DOI :
10.1109/NSSMIC.1997.670525
