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PET/MR and SPECT/MR: New Paradigms for Combined Modalities in Molecular Imaging Conference, La Biodola : Italie (2012)
High performance detector head for PET and PET/MR with continuous crystals and SiPMs
G. Llosa1, P. Barrillon2, J. Barrio1, M.G. Bisogni, J. Cabello1, A. Del Guerra, A. Etxebeste1, J.E. Gillam1, C. Lacasta1, J.F. Oliver1, M. Rafecas1, C. Solaz1, V. Stankova1, C. De La Taille2

A high resolution PET detector head for small animal PET applications has been developed. The detector is composed of a 12 mm x 12 mm source continuous LYSO crystal coupled to a 64-channel monolithic SiPM matrix from FBK-irst. Crystal thicknesses of 5 mm and 10 mm have been tested, both yielding an intrinsic spatial resolution around 0.7 mm FWHM with a position determination algorithm that can also provide depth-of-interaction information. The detectors have been tested in a rotating system that makes it possible to acquire tomographic data and reconstruct images of 22Na sources. An image reconstruction method specifically adapted for continuous crystals has been employed. The Full Width at Half Maximum measured from a point source reconstructed with ML-EM was 0.7 mm with the 5 mm crystal and 0.8 mm with the 10 mm crystal.
1 :  IFIC - Instituto de Fisica Corpuscular
2 :  LAL - Laboratoire de l'Accélérateur Linéaire
Sciences de l'ingénieur/Micro et nanotechnologies/Microélectronique

Physique/Physique/Instrumentations et Détecteurs
Monolithic crystals – SiPM – MG-APD – PET – High resolution – Position determination