Development of Depth-of-interaction (DOI) Detector for PET and Prototype PET Scanner

INTRODUCTION:Our group has been developed a prototype PET scanner, jPET-D4. It is designed to achieve high performance by the use of depth-of-interaction (DOI) detectors. The DOI detector offers 3D radiation detected location and it is the new technique of necessity to gain sensitivity with maintaining spatial resolution in a PET system. In most proposals, DOI detectors have two scintillation crystal layers as depth information. However, we developed a 4-layer DOI detector and showed its capability of easy construction and performance reliability even in mass-production process. On the basis of the 4-layer DOI encoding technique, we further developed a simpler 4-layer DOI encoding method and recently an 8-layer encoding method. In this presentation, we will introduce the jPET-D4 scanner and our DOI detectors.「第６回放射線生物学および画像医学に関する日仏ワークショップ The 6th Japan-France Workshop on Radiobiology and Isotopic imaging