The ClearMind project aims to develop a TOF-PET position-sensitive detection module optimized for time and spatial resolutions and detection efficiency. For this, we use a 59 mm × 59 mm × 5 mm monolithic PbWO4 (PWO) crystal, which is encapsulated within a commercial Micro-Channel Plate Photomultiplier tube MAPMT253 with a bialkali photocathode directly deposited on the crystal. We report the proof of concept of the directly deposited of a bialkali photocathode on a PWO crystal and its stability over time. The full calibration of the ClearMind photodetector module in the single-photoelectron regime is described. We measured a time resolution of 70 ps FWHM using a 20 ps pulsed laser. We present the performance of the prototype used in coincidence with a 3 × 3 × 3 mm3 LYSO:Ca,Ce crystal readout by a SiPM. We obtained a coincidence time resolution of 350 ps FWHM, a spatial resolution of 4 to 5 mm, and a detection efficiency of 28 %, consistent with Monte Carlo simulations of the ClearMind detector module.
@article{arxiv.2312.13169,
title = {First ClearMind gamma detector prototype for TOF-PET imaging},
author = {A. Galindo-Tellez and V. Sharyy and C. -H. Sung and M. Follin and L. Cappellugola and S. Curtoni and M. Dupont and C. Morel and D. Breton and J. Maalmi and D. Yvon},
journal= {arXiv preprint arXiv:2312.13169},
year = {2024}
}