[15a-2W-1~14] 2.1 Radiation physics and Detector fundamentals

△ [15a-2W-14] Feasibility Study on Novel DOI-PET Detector Based on Vp/Q Discrimination

〇Ryo Ogawara¹, Masayori Ishikawa¹ (1.Hokkaido Univ.)

Keywords:Scintillator,Geant4,DOI-PET

The V_p/Q discrimination method base on the ratio of peak voltage and integrated charge in PMT output waveform equipped with LaBr₃:Ce scintillator was developed aiming at alpha-gamma discrimination. We found that the V_p/Q value is equivalent of a scintillation decay time with a high resolution using Geant4 Monte Carlo code. It is possible to discriminate scintillators, which have different decay times, in common readout using the V_p/Q discrimination, and the technique is applied for the depth-of-interaction (DOI) PET detector. Feasibility study on the DOI detector based on the V_p/Q discrimination was carried out using Geant4. In this result, It is found that the Vp/Q discrimination method can be applied for the multi-layer DOI detector.