[5p-S43-1~13] 2.2 Detection systems

△ [5p-S43-10] Fabrication of ComptonPET hybrid camera using Ce:Gd₃(Ga,Al)₅O₁₂ and Eu:SrI₂ and
test of simultaneous imaging of multi-RI tracers using ¹⁸F and ¹¹¹In

〇Masao Yoshino^1,3, Kei Kamada^2,3, Yasuhiro Shoji^1,3, Yuui Yokota², Shunsuke Kurosawa^2,6, Akihiro Yamaji¹, Yuji Ohashi², Akira Yoshikawa^1,2,3, Kenji Shimazoe⁴, Yuki Mizumachi⁴, Hiroyuki Takahashi⁴, Kenichiro Okane⁵, Miwako Takahashi⁵ (1.IMR, Tohoku Univ., 2.NICHe, Tohoku Univ., 3.C&A Corporation, 4.Department of Nuclear Engineering and Management, The Univ. of Tokyo, 5.Department of Radiology and Nuclear Medicine, The Univ. of Tokyo, 6.Department of Physics, Yamagata Univ.)

Keywords:Scintillators, Positron Emission Tomography, Compton camera

An array detector was prototyped by combining MPPC array with Ce:GGAG and Eu:SrI₂, and the energy resolution and the linearity of the output response with respect to gamma ray energies were evaluated. As an example, an energy resolution of 15.5% ± 1.1% FWHM was obtained with ⁵⁷Co at 122 keV gamma-rays. Performed test of multi-tracer simultaneous imaging using ¹⁸F and ¹¹¹In was demonstrated, and it is possible to image ¹⁸F and ¹¹¹In independently. In this presentation, we also report on the evaluation results of Eu:SrI₂ array detector, and discuss the characteristics required for the scintillator to use for ComptonPET application.