Title: Measuring 511 keV photon interaction locations in three dimensions using 3-D position sensitive scintillation detectors
Abstract: We present for the first time data obtained with a detector comprising multiple layers of dual LYSO-PSAPD modules. We achieved < 11 % FWHM energy resolution for single layer hits. Results show we are able to position multi-interaction photon events in three dimensions, with a direct measurement of the depth of each interaction. The energy deposition of these events adds up to 511 keV. The preliminary data presented in this paper is a first proof-of-concept of a 3-D position-sensitive scintillation detector.