Coincidence resolution time of two small scintillators coupled to high quantum-efficiency photomultipliers in a PET-like system

Abstract

The lower limit of the time resolution for a positron emission tomography (PET) system has been measured for two scintillator types, LYSO:Ce and LuAG:Pr. Small dimension crystals and ultra bi-alkali phototubes have been used in order to increase the detected scintillation photons. Good timing resolutions of 118 ps and 223 ps FWHM have been obtained for two LYSO and two LuAG, respectively, exposed to a 22Na source. © Owned by the authors, published by EDP Sciences, 2014.