Timing properties measurements of STMicroelectronics silicon photomultipliers for PET scanners

摘要

Preliminary results concerning the study of timing and energy resolution properties of recent Silicon Photomultipliers (SiPMs) devices by STMicroelectronics are here discussed in view of their possible applications in TOF PET modules and PET/MRI hybrid systems. A pair of devices with 60 × 60 microcells and an active area of 3.5 × 3.5 mm~2 have been coupled to 3×3×15 mm~3 LYSO crystals and fully characterized. Measurements of the linearity response with different gamma sources and of the timing resolution with the two 511 keV photons from a ~(22)Na positron source have been carried out.