[14p-PA2-1~86] 2 Ionizing Radiation

[14p-PA2-79] Development of DOI PET detector with localized centroid logic

〇Eiji Yoshida¹, Kei Kamada², Taiga Yamaya¹ (1.QST, 2.Tohoku Univ.)

Keywords:PET, DOI detector

In this work, we developed the novel single-end readout DOI detector with quadrisected GAGG crystals comparable in size to the MPPC. One pair of four-layered crystals coupled with a partial optical window is arranged across two MPPCs. Boundaries without the partial optical window are covered with optical reflectors. Light sharing is done between pair of four-layered crystals optically coupled at one end. Each pair is coupled with a different pattern of two MPPCs. Crystal identification from each pair is obtained from output rate of two MPPCs. From 511-keV uniform irradiation, responses of all crystal elements in the four layers can be separated clearly. Also, DOI information can be mapped to each cluster on the curved lines.