Performance Demonstration for PET Detector Using 0.2 mm phi Wavelength-Shifting Fibers

Recently we are developing a new gamma ray detector using wavelength-sifting-fibers (WLSFs), silicon photomultipliers (SiPMs) and scintillator plates (28 mm X 28 mm X 3.4 mm) for Positron Emission Tomography (PET) [1]. It is expected the position resolution and the energy resolution are less than 1
_~
4 mm [2] and approximately 13% [3], respectively. In this study, the detector performance (the position resolution and the energy resolution) for 511-keV gamma ray was demonstrated by experiments.