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Three-dimensional and multienergy $$gamma$$-ray simultaneous imaging by using a Si/CdTe Compton camera

Suzuki, Yoshiyuki*; Yamaguchi, Mitsutaka; Odaka, Hirokazu*; Shimada, Hirofumi*; Yoshida, Yukari*; Torikai, Kota*; Sato, Takahiro; Arakawa, Kazuo*; Kawachi, Naoki; Watanabe, Shigeki; Takeda, Shinichiro*; Ishikawa, Shinnosuke*; Aono, Hiroyuki*; Watanabe, Shin*; Takahashi, Tadayuki*; Nakano, Takashi*

Capabillity tests of 3D imaging for medical applications were performed by using a new Compton camera. $$^{18}$$F, $$^{131}$$I and $$^{67}$$Ga separately compacted into micro tubes were injected subcutaneously into a Wister rat and imaged after sacrifice of the rat (ex-vivo model). In a separate experiment $$^{111}$$In-chloride and $$^{131}$$I-Methylnorcholestenol were injected into a rat intravenously and $$^{64}$$Cu was injected into the stomach orally just before imaging (more physiological model). The Compton camera demonstrated its 3D multinuclear imaging capability by separating out the three nuclear distributions clearly in ex-vivo model. In the more physiological model, the distributions of $$^{131}$$I and $$^{64}$$Cu were clearly imaged although $$^{111}$$In was difficult to visualize due to blurring at low energy region of $$gamma$$-ray. In conclusion, our new Compton camera successfully demonstrated highly resolved multiplanar and multinuclear $$gamma$$-ray simultaneous imaging.

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Category:Radiology, Nuclear Medicine & Medical Imaging

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