Four-layer DOI-PET detector with a silicon photomultiplier array

Silicon photomultipliers are promising photo detectors for use in PET detectors due to their high internal gain, low power consumption and insensitivity to magnetic fields. We are developing a PET detector which consists of a scintillation crystal array and a silicon photomultiplier array. To achieve uniform spatial resolution, depth-of-interaction (DOI) detectors are required to reduce the parallax error. In this paper, we are studying the four-layer DOI PET detector with a silicon photomultiplier array.