[9a-Z14-1~12] 2.5 Medical application

△ [9a-Z14-4] Zr-89 whole gamma imaging with a 2-layer DOI GSO scatterer detector

〇Sodai Takyu¹, Hideaki Tashima¹, Eiji Yoshida¹, Hidekatsu Wakizaka¹, Fujino Obata¹, Miwako Takahashi¹, Kotaro Nagatsu¹, Atsushi Tsuji¹, Katia Parodi², Taiga Yamaya¹ (1.NIRS-QST, 2.LMU Munchen)

Keywords:Whole gamma imaging, Positron emission tomography, Compton camera

Whole gamma imaging (WGI) is a new concept which utilizes all detectable gamma rays for diagnosis by inserting a scatterer detector ring into a PET ring to add a function of Compton camera. In this study, we focused on the detection of 909 keV gamma ray emitted from ⁸⁹Zr and developed a new WGI system with a two-layer DOI GSO scatterer detector ring. In the measurement with a ⁸⁹Zr point source, an angular resolution measure (ARM) of 6.0 degrees was obtained at the center of the field of view. This value is converted to a position accuracy of 4.4 mm in length. It was shown that the new WGI system is capable of ⁸⁹Zr Compton imaging approaching PET images.