SiPM arrays and miniaturized readout electronics for compact gamma camera
Résumé
This article reports on the design and features of a very compact and light gamma camera based on SiPM
arrays and miniaturized readout electronics dedicated to tumor localization during radio-guided cancer
surgery. This gamma camera, called MAGICS, is composed of four (2x2) photo-detection elementary
modules coupled to an inorganic scintillator. The 256 channels photo-detection system covers a sensitive
area of 54x53 m^2. Each elementary module is based on four (2x2) SiPM monolithic arrays, each array
consisting of 16 SiPM photo-sensors (4x4) with3x3 mm^2 sensitive area, coupled to a miniaturized
readout electronics and a dedicated ASIC. The overall dimensions of the electronics fit the size of the
detector, enabling to assemble side-by-side several elementary modules in a close-packed arrangement.
The preliminary performances of the system are very encouraging, showing an energy resolution of 9.8%
and a spatial resolution of less than 1 mm at 122 keV.