The development of the molecular imaging technique based on radiopharmaceuticals requiring sophisticated devices with sub-millimeter spatial resolution and high detection e±ciency. Recently, in the field of scintillation gamma camera, it has been demostrated continuous crystals may improve spatial resolution with respect to the use of scintillation arrays. In this work we propose a new algorithm that improve spatial resolution. It calculates the position from a single scintillation event by squaring the charge collected on a multi-anodes photomultiplier tube (MA-PMT). It is able to remove the position linearity distortion due to the light reflections and the truncations at the crystal edge. We present measurements from a compact gamma camera based on a sample of 51 mm x 51 mm x 4.0 mm LaBr3:Ce continuous scintillation crystal, coupled to a MA-PMT Hamamatsu H8500. The results show a strong improvement in spatial resolution and confirm the high potential in using of LaBr continuous crystal for molecular imaging applications.
R. Pani, F. Vittorini, M.N. Cinti, P. Bennati, R. Pellegrini, S. Ridolfi, et al. (2009). Revisited position arithmetics for LaBr3:Ce continuous crystals. NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 197, 383-386 [10.1016/j.nuclphysbps.2009.10.109].
Revisited position arithmetics for LaBr3:Ce continuous crystals
LO MEO, SERGIO;NAVARRIA, FRANCESCO LUIGI;
2009
Abstract
The development of the molecular imaging technique based on radiopharmaceuticals requiring sophisticated devices with sub-millimeter spatial resolution and high detection e±ciency. Recently, in the field of scintillation gamma camera, it has been demostrated continuous crystals may improve spatial resolution with respect to the use of scintillation arrays. In this work we propose a new algorithm that improve spatial resolution. It calculates the position from a single scintillation event by squaring the charge collected on a multi-anodes photomultiplier tube (MA-PMT). It is able to remove the position linearity distortion due to the light reflections and the truncations at the crystal edge. We present measurements from a compact gamma camera based on a sample of 51 mm x 51 mm x 4.0 mm LaBr3:Ce continuous scintillation crystal, coupled to a MA-PMT Hamamatsu H8500. The results show a strong improvement in spatial resolution and confirm the high potential in using of LaBr continuous crystal for molecular imaging applications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
