Development of high-precision color gamma-ray image sensor based on TSV-MPPC and diced scintillator arrays

Tsubasa Oshima, Jun Kataoka, Aya Kishimoto, Takuya Fujita, Yota Kurei, Toru Nishiyama, Seiichi Yamamoto, Koichi Ogawa

    研究成果: Conference contribution

    抄録

    We developed a high-precision color gamma-ray image sensor with fine spatial resolution that is cost-effective, widely applicable, and very sensitive by using a diced cerium-doped Gd3Al2 Ga3O12 (Ce:GAGG) scintillator array coupled with a 3.0 × 3.0 mm2/pixel 8 × 8 MPPC-array. The proposed image sensor can measure the energy of individual X-ray photons transmitted through an object. The pixel size of the Ce:GAGG scintillator array is 0.2 mm, and the pixels are separated by 50-μm-wide micro-grooves. The image sensor has a size of 20 × 20 mm2 and thickness of 1.0 mm, and it achieved an excellent spatial resolution of 0.3-0.4 mm and energy resolutions of 12% and 18% (FWHM) for 122 and 59.5 keV gamma-rays, respectively. We conducted an experiment to determine the local effective atomic number of metals by using dual-energy gamma-ray sources. In addition, we developed a color-composite image using mixed images taken at three energies (31, 59.5, and 88 keV).

    本文言語English
    ホスト出版物のタイトル2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015
    出版社Institute of Electrical and Electronics Engineers Inc.
    ISBN(電子版)9781467398626
    DOI
    出版ステータスPublished - 2016 10月 3
    イベント2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015 - San Diego, United States
    継続期間: 2015 10月 312015 11月 7

    Other

    Other2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015
    国/地域United States
    CitySan Diego
    Period15/10/3115/11/7

    ASJC Scopus subject areas

    • 核物理学および高エネルギー物理学
    • 放射線学、核医学およびイメージング
    • 器械工学

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