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dc.contributor.authorBergeron, Mélaniefr
dc.contributor.authorPepin, Catherine M.fr
dc.contributor.authorCadorette, Julesfr
dc.contributor.authorLoignon-Houle, Francisfr
dc.contributor.authorFontaine, Réjeanfr
dc.contributor.authorLecomte, Rogerfr
dc.contributor.editorCentre d'imagerie moléculaire de Sherbrookefr
dc.date.accessioned2015-03-20T00:48:35Z
dc.date.available2015-03-20T00:48:35Z
dc.date.created2015fr
dc.date.issued2015-03-19
dc.identifier.urihttp://hdl.handle.net/11143/6709
dc.description.abstractL'introduction de nouveaux scintillateurs permet d'améliorer les performances des modules de détection LabPET. // Abstract : The scintillator is one of the key building blocks that critically determine the physical performance of PET detectors. The quest for scintillation crystals with improved characteristics has been crucial in designing scanners with superior imaging performance. Recently, it was shown that the decay time constant of high lutetium content Lu[subscript 1.8]Gd[subscript 0.2]SiO[subscript5] : Ce (LGSO) scintillators can be adjusted by varying the cerium concentration from 0.025 mol% to 0.75 mol%, thus providing interesting characteristics for phoswich detectors. The high light output (90%–120% NaI) and the improved spectral match of these scintillators with avalanche photodiode (APD) readout promise superior energy and timing resolutions. Moreover, their improved mechanical properties, as compared to conventional LGSO (Lu[subscript 0.4]Gd[subscript 1.6]SiO[subscript 5] : Ce), make block array manufacturing readily feasible. To verify these assumptions, new phoswich block arrays made of LGSO-90%Lu with low and high mol% Ce concentrations were fabricated and assembled into modules dedicated to the LabPET scanner. Typical crystal decay time constants were 31 ns and 47 ns, respectively. Phoswich crystal identification performed using a digital pulse shape discrimination algorithm yielded an average 8% error. At 511 keV, an energy resolution of 17–21% was obtained, while coincidence timing resolution between 4.6 ns and 5.2 ns was achieved. The characteristics of this new LGSO-based phoswich detector module are expected to improve the LabPET scanner performance. The higher stopping power would increase the detection efficiency. The better timing resolution would also allow the use of a narrower coincidence window, thus minimizing the random event rate. Altogether, these two improvements will significantly enhance the noise equivalent count rate performance of an all LGSO-based LabPET scannerfr
dc.language.isoengfr
dc.relation.isformatofdoi:10.1109/TNS.2015.2388757fr
dc.relation.ispartofISSN:0018-9499fr
dc.relation.ispartofIEEE transactions on nuclear sciencefr
dc.subjectPositron emission tomographyfr
dc.subjectPreclinical imagingfr
dc.subjectScintillation detectorsfr
dc.subjectAvalanche photodiodesfr
dc.subjectLabPET small animal scannerfr
dc.subjectLGSO scintillatorsfr
dc.subjectEnergy resolutionfr
dc.subjectTiming resolutionfr
dc.titleImproved LabPET detectors using Lu1.8Gd0.2SiO5:Ce (LGSO) scintillator blocksfr
dc.typeArticlefr
udes.description.typestatusPrépublicationfr
udes.description.typepubRévisé et accepté par des pairsfr
udes.description.pages36-41fr
udes.description.period62 (1)fr
udes.description.diffusionDiffusé par Savoirs UdeS, le dépôt institutionnel de l'Université de Sherbrookefr
dc.identifier.bibliographicCitation“Improved LabPET detectors using Lu1.8Gd0.2SiO5:Ce (LGSO) scintillator blocks”. Mélanie Bergeron, Catherine M. Pepin, Jules Cadorette, Francis Loignon-Houle, Réjean Fontaine, Roger Lecomte. IEEE Transactions on Nuclear Science, vol. 62, no. 1, pp. 36-41, Février 2015. (DOI: 10.1109/TNS.2015.2388757)fr
udes.description.sourceIEEE transactions on nuclear sciencefr
udes.autorisation.depottruefr
udes.description.ordreauteursBergeron, Mélanie; Pepin, Catherine M.; Cadorette, Jules; Loignon-Houle, Francis; Fontaine, Réjean; Lecomte, Roger


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