Title :
A Monte-Carlo study of BaF2 detectors for TOF PET
Author :
Bhatia, M. ; Tzanakos, G. ; Pavlopoulos, S.
Author_Institution :
Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
Preliminary results are presented of Monte Carlo calculations of the time-of-flight (TOF) resolution of BaF2 gamma-ray detectors with photomultiplier readout. Light propagation inside the crystal, decay properties and light output of the scintillator, quantum efficiency of the photocathode, current pulse formation, and overall time-of-flight resolution are discussed. It is concluded that the length of the crystal has a strong effect on the light collection time spread, due to reflections and to the exponential distribution of interaction points inside the crystal. A TOF resolution of less than 100 ps is found for a crystal length of less than 4 cm
Keywords :
Monte Carlo methods; barium compounds; computerised tomography; gamma-ray detection and measurement; radioisotope scanning and imaging; BaF2 detectors; Monte Carlo calculations; crystal length; current pulse formation; exponential distribution; gamma-ray detectors; interaction points; interaction points distribution; light collection time spread; light propagation; medical diagnostic imaging; photomultiplier readout; quantum efficiency; reflections; scintillator; time-of-flight positron emission tomography; Cathodes; Detectors; Lighting; Optical reflection; Optical refraction; Photonic crystals; Positron emission tomography; Pulse shaping methods; Sequences; Speech synthesis;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95899
