Stereo Compton cameras for the 3-D localization of radioactive isotopes optimized by Geant4

K. Takeuchi, J. Kataoka, T. Nishiyama, T. Fujita, A. Kishimoto, S. Ohsuka, S. Nakamura, A. Adachi, M. Hirayanagi, T. Uchiyama, Y. Ishikawa, T. Kato

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

The Compton camera is a convenient tool used to visualize the distribution of radioisotopes that emit gamma rays. Following the nuclear disaster in Fukushima in 2011, there is a particularly urgent need to develop 'gamma cameras', which can visualize the distribution of such radioisotopes. In response, we propose a portable Compton camera, which comprises 3-D position-sensitive GAGG scintillators coupled with thin monolithic MPPC arrays. We report on the detailed optimization of the detector design, based on Geant4 simulation. The results show that detection efficiency reaches up to 0.54%, or more than 10 times that of other cameras being tested in Fukushima, along with a moderate angular resolution of 8.1° (FWHM). By applying the triangular surveying method, we also propose a new concept for the 'stereo' measurement of gamma rays by using two Compton cameras, thus enabling the 3-D positional measurement of radioactive isotopes for the first time. From one point source simulation data, we ensured that the source position and the distance to the same could be determined typically to within 2 meters' accuracy and we also confirmed that more than two sources are clearly separated by the event selection from two point sources of simulation data.

本文言語English
ホスト出版物のタイトル2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(印刷版)9781479905348
DOI
出版ステータスPublished - 2013 1 1
外部発表はい
イベント2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013 - Seoul, Korea, Republic of
継続期間: 2013 10 272013 11 2

出版物シリーズ

名前IEEE Nuclear Science Symposium Conference Record
ISSN(印刷版)1095-7863

Other

Other2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013
CountryKorea, Republic of
CitySeoul
Period13/10/2713/11/2

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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