002256681 001__ 2256681
002256681 003__ SzGeCERN
002256681 005__ 20170323082432.0
002256681 0247_ $$2DOI$$a10.1109/NSSMIC.2011.6154402
002256681 0248_ $$aoai:cds.cern.ch:2256681$$pcerncds:CERN
002256681 041__ $$aeng
002256681 100__ $$aAuffray, E.$$uCERN
002256681 245__ $$aA comprehensive & systematic study of coincidence time resolution and light yield using scintillators of different size, wrapping and doping
002256681 260__ $$c2011
002256681 520__ $$aOver the last years interest in using time-of-flight-based Positron Emission Tomography (TOF-PET) systems has significantly increased. High time resolution in such PET systems is a powerful tool to improve signal to noise ratio and therefore to allow smaller exposure rates for patients as well as faster image reconstruction. Improvement in coincidence time resolution (CTR) in PET systems to the level of 200ps FWHM requires the optimization of all parameters in the photon detection chain influencing the time resolution: crystal, photodetector and readout electronics. After reviewing the factors influencing the time resolution of scintillators, we will present in this paper the light yield and CTR obtained for different scintillator types (LSO:Ce, LYSO:Ce, LGSO:Ce, LSO:Ce:0.4Ca, LuAG:Ce, LuAG:Pr) with different cross-sections, lengths and reflectors. Whereas light yield measurements were made with a classical PMT, all CTR tests were performed with Hamamatsu-MPPCs or SiPMs S10931-050P. The CTR measurements were based on the time-over-threshold method in a coincidence setup using the ultra fast amplifier-discriminator chip NINO and a fast oscilloscope. Strong correlations between light yield and CTR were found. Excellent results have been obtained for LYSO crystals of 2×2×10mm3 and LYSO pixels of 0.75×0.75×10mm3 with a CTR of 175ps and 188ps FWHM, respectively.
002256681 65017 $$2SzGeCERN$$aDetectors and Experimental Techniques
002256681 690C_ $$aARTICLE
002256681 690C_ $$aCERN
002256681 700__ $$aFrisch, B.$$uCERN
002256681 700__ $$aGeraci, F.$$uMilan Bicocca U.
002256681 700__ $$aGhezzi, A.$$uMilan Bicocca U.
002256681 700__ $$aGundacker, S.$$uCERN
002256681 700__ $$aHillemanns, H.$$uCERN
002256681 700__ $$aJarron, P.$$uINFN, Turin
002256681 700__ $$aMeyer, T.$$uCERN
002256681 700__ $$aPaganoni, M.$$uMilan Bicocca U.
002256681 700__ $$aPauwels, K.$$uCERN
002256681 700__ $$aPizzichemi, M.$$uMilan Bicocca U.
002256681 700__ $$aLecoq, P.$$uCERN
002256681 916__ $$sh$$w201651
002256681 960__ $$a13
002256681 962__ $$b1319601$$k64-71$$nvalencia20111023
002256681 980__ $$aARTICLE
002256681 980__ $$aConferencePaper