The availability of LaBr(3):Ce crystals from St. Gobain has started various investigations in the field of medical imaging, in particular in PET, SPECT and Compton camera systems. At present LaBr(3):Ce crystals are available in a continuous shape covering up to 10 x 10 cm(2) with a thickness of 1 cm, in contrast, serious concerns are arising in pixellated manufacturing. With the aim of verifying the potentials introduced by LaBr(3):Ce for SPET imaging, two small gamma cameras based on Anger camera principle have been assembled and imaging performances were compared. Two crystals of LaBr(3):Ce and NaI(Tl) with the same detection area (5 x 5 cm(2)) and thickness of 5 and 1.5 mm, respectively were been integrally assembled with a H8500 Hamamatsu flat panel PMT. Through the thicker crystal, the LaBr(3):Ce camera showed superior imaging and detection performances at 140 keV compared with the NaI(Tl) one, with 0.9 mm FWHM intrinsic spatial resolution, 8% FWHM energy resolution and 80% intrinsic detection efficiency. (c) 2006 Elsevier B.V. All rights reserved.
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|Titolo:||Ce doped lanthanum tri-bromide SPET scanner for molecular imaging|
|Data di pubblicazione:||2007|
|Appartiene alla tipologia:||01a Articolo in rivista|