The ClearPET$^{TM}$ project: development of a 2nd generation high-performance small animal PET scanner

K. Ziemons E. Auffray R. Barbier 1 G. Brandenburg P. Bruyndonckx Y. Choi D. Christ N. Costes Y. Déclais 1 O. Devroede C. Dujardin A. Fedorovd U. Heinrichs M. Korjik M. Krieguer C. Kuntner G. Largeron 1 C. Lartizien H. Larue P. Lecoq S. Leonard J. Marteau 1 C. Morel J.-B. Mosset C. Parl C. Pédrini A.G. Petrosyan U. Pietrzyk M. Rey S. Saladino D. Sappey-Marinier L. Simon M. Streun S. Tavernier J.-M. Vieira
1 IPNL - Institut de Physique Nucléaire de Lyon
Abstract : Second generation high-performance PET scanners, called ClearPET$^{TM}$, have been developed by working groups of the Crystal Clear Collaboration (CCC). High sensitivity and high spatial resolution for the ClearPET camera is achieved by using a phoswich arrangement combining two different types of lutetium-based scintillator materials: LSO from CTI and LuYAP:Ce from the CCC (ISTC project). In a first ClearPET prototype, phoswich arrangements of 8$\times$8 crystals of 2$\times$2$\times$10 mm$^3$ are coupled to multi-channel photomultiplier tubes (Hamamatsu R7600). A unit of four PMTs arranged in-line represents one of 20 sectors of the ring design. The opening diameter of the ring is 120 mm, the axial detector length is 110 mm. The PMT pulses are digitized by free-running ADCs and digital data processing determines the gamma energy, the phoswich layer and even the exact pulse starting time, which is subsequently used for coincidence detection. The gantry allows rotation of the detector modules around the field of view. Preliminary data shows a correct identification of the crystal layer about (98$\pm$1)%. Typically the energy resolution is (23.3$\pm$0.5)% for the luyap layer and (15.4$\pm$0.4)% for the lso layer. Early studies showed the timing resolution of 2 ns FWHM and 4.8 ns FWTM. the intrinsic spatial resolution ranges from 1.37 mm to 1.61 mm full-width of half-maximum (FWHM) with a mean of 1.48 mm FWHM. further improvements in image and energy resolution are expected when the system geometry is fully modeled.
Keywords : Positron emission tomography Small animal PET Depth of interaction Dual layer phoswich system
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Communication dans un congrès
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http://hal.in2p3.fr/in2p3-00024319
Contributeur : Sylvie Flores <>
Soumis le : vendredi 1 juillet 2005 - 09:25:56
Dernière modification le : mardi 19 novembre 2019 - 02:38:27

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IPNL | CNRS | IN2P3 | UNIV-LYON1 | IP2I | UDL

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K. Ziemons, E. Auffray, R. Barbier, G. Brandenburg, P. Bruyndonckx, et al.. The ClearPET$^{TM}$ project: development of a 2nd generation high-performance small animal PET scanner. 7th International Conference on Inorganic Scintillators and their Use in Scientific and Industrial Applications SCINT 2003, Sep 2003, Valencia, Spain. pp.307-311, ⟨10.1016/j.nima.2004.08.032⟩. ⟨in2p3-00024319⟩

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