Speaker
Mr
Filipe Castro
(Universidade de Aveiro)
Description
We are studying and developing a gamma camera based on optical fibers coupled to both sides of inorganic scintillation crystals and using for the light readout highly sensitive photodetectors, namely silicon photomultipliers (SiPMs) and high efficiency multi-anode photomultiplier tubes (MaPMTs). The coupling of the fibers in orthogonal directions allows obtaining 2D position information, while the energy signal is provided by a PMT. The application of optical fibers combined with SiPMs as light sensors is likely to improve the spatial resolution to the 1-2 mm FWHM level, thus improving the sensitivity of scintigraphy techniques.
A first prototype laboratory system has been developed using a custom-made 50×50×3 mm3 CsI(Na) crystal with embedded 1 mm Ø fibers and reading out the light from 12 of the fibers in each direction with a MaPMT. Proof-of-concept studies and results obtained with this system using Co-57 are presented. Larger prototype systems up to 12 × 12 cm2 are planned, using 1 mm2 SiPMs individually coupled to the fibers. Ongoing development and preliminary results of these prototypes will be presented.
Primary author
Mr
Filipe Castro
(Universidade de Aveiro)
Co-authors
Dr
António Soares
(i3n, Physics Department, University of Aveiro, Portugal)
Prof.
João Veloso
(i3n, Physics Department, University of Aveiro, Portugal)
Mr
Luís Moutinho
(i3n, Physics Department, University of Aveiro, Portugal)
