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Development of radiation imaging system using small-size light-weight Compton camera mounted on remotely operated machines, 3; Study on 3D reconstruction from Compton camera data

Miyamura, Hiroko ; Kaburagi, Masaaki ; Sato, Yuki ; Kawamura, Takuma; Idomura, Yasuhiro  ; Torii, Tatsuo 

We report the results of experiments for reconstructing three-dimensional volume data of distributions of radiation sources via two reconstruction algorithms from measurement datasets by a Compton camera. To obtain accurate distributions of radiation sources, which were released by the Fukushima Daiichi Nuclear Power Plant accident, detailed measurements of $$gamma$$ rays are necessary. In this report, as a preliminary experiment, we address three-dimensional reconstruction from measurement data under ideal conditions, using two algorithms: a three-dimensional back-projection method and a list-mode maximum likelihood estimation method. By using these methods, the radiation sources can be accurately reconstructed from the measurement datasets.

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