Speaker
Dr
Gabriela Llosa
(IFIC-Valencia)
Description
Silicon Photomultipliers (SiPMs) offer an alternative to PMTs that allow the implementation of innovative detector types. Continuous scintillator crystals coupled to SiPM arrays provide higher efficiency than pixellated crystals. We are applying this approach in two different medical imaging fields with successful results.
The use of SiPM arrays makes it possible stacking several detector layers in the development of a Compton telescope for dose monitoring in hadron therapy within the European project ENVISION. The prototype under development consists of a stack of three LaBr3 crystals coupled to a SiPM arrays. Tests with two detectors in time coincidence have been carried out, each one consisting of a 16mm x 18mm x 5mm crystal (one LaBr3 and one LYSO) coupled to a SiPM array from Hamamatsu, and employing the SPIROC1 ASIC as readout electronics. Imaging tests are ongoing, and larger detectors are under development.
A small animal PET prototype scanner has been developed, comprising two rotating heads. Each head is composed of a 12mm x 12mm LYSO crystal of 5 or 10 mm thickness coupled to a monolithic, 64 pixel SiPM matrix. The MAROC2 ASIC is employed as front-end electronics. Images of one and two point sources have been reconstructed with a FWHM of 0.7 mm.
Author
Dr
Gabriela Llosa
(IFIC-Valencia)
Co-authors
Mr
Carles Solaz
(IFIC-Valencia)
Carlos Lacasta Llacer
(Universidad de Valencia (ES))
Mr
John Barrio
(IFIC-Valencia)
Dr
John E. Gillam
(IFIC-Valencia)
Jorge Cabello
(University of Valencia)
Dr
Josep F. Oliver
(IFIC-Valencia)
Mr
Ludovic Raux
(Laboratoire de l'Accélérateur Linéaire)
Dr
Magdalena Rafecas
(Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia/CSIC)
Mr
Marco Trovato
(IFIC-Valencia)
Maria Giuseppina Bisogni
(Univ. + INFN)
Pierre Andreas Barrillon
(Universite de Paris-Sud 11 (FR))
Stéphane Callier
(OMEGA / IN2P3 - CNRS)
Mrs
Vera Stankova
(IFIC-Valencia)
alberto Del Guerra
(University of Pisa)
Dr
christophe de La Taille
(CNRS LAL Orsay)
