Author/Authors :
Pani، نويسنده , , R. De Pellegrini، نويسنده , , R. and Cinti، نويسنده , , M.N. and Bennati، نويسنده , , P. and Betti، نويسنده , , M. and Vittorini، نويسنده , , F. and Mattioli، نويسنده , , M. and Trotta، نويسنده , , G. and Orsolini Cencelli، نويسنده , , V. and Scafè، نويسنده , , R. and Navarria، نويسنده , , F. and Bollini، نويسنده , , D. and Baldazzi، نويسنده , , G. and Moschini، نويسنده , , G. and de Notaristefani، نويسنده , , F.، نويسنده ,
Abstract :
The availability of LaBr3: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 LaBr3:Ce crystals are available in a continuous shape covering up to 10×10 cm2 with a thickness of 1 cm, in contrast, serious concerns are arising in pixellated manufacturing. With the aim of verifying the potentials introduced by LaBr3:Ce for SPET imaging, two small γ cameras based on Anger camera principle have been assembled and imaging performances were compared. Two crystals of LaBr3:Ce and NaI(Tl) with the same detection area (5×5 cm2) 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 LaBr3: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.
Keywords :
inorganic scintillators , LaBr3:Ce , Energy resolution , ? ray imagers , Nuclear medicine
