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タイトル: | Selective Isotope CT Imaging Based on Nuclear Resonance Fluorescence Transmission Method |
著者: | Ali, Khaled Ohgaki, Hideaki https://orcid.org/0000-0002-3553-4091 (unconfirmed) Zen, Heishun https://orcid.org/0000-0002-2719-6985 (unconfirmed) Kii, Toshiteru Hayakawa, Takehito Shizuma, Toshiyuki Toyokawa, Hiroyuki Taira, Yoshitaka Iancu, Violeta Turturica, Gabriel Ur, Calin Alexandru Fujimoto, Masaki Katoh, Masahiro |
著者名の別形: | 大垣, 英明 全, 炳俊 紀井, 俊輝 早川, 岳人 静間, 俊行 豊川, 弘之 平, 義隆 藤本, 將輝 加藤, 政博 |
キーワード: | Computed tomography (CT) isotope distribution laser Compton scattering (LCS) gamma-ray beam nuclear resonance fluorescence (NRF) |
発行日: | Aug-2020 |
出版者: | Institute of Electrical and Electronics Engineers (IEEE) |
誌名: | IEEE Transactions on Nuclear Science |
巻: | 67 |
号: | 8 |
開始ページ: | 1976 |
終了ページ: | 1984 |
抄録: | The isotope selectivity of computed tomography (CT) imaging based on nuclear resonance fluorescence (NRF) transmission method using a quasi-monochromatic laser Compton scattering (LCS) gamma-ray beam in the MeV region was demonstrated at the Ultra Violet Synchrotron Orbital Radiation–III (UVSOR-III) Synchrotron Radiation Facility (Institute of Molecular Science, National Institute of Natural Science) for two enriched lead isotope rods ( 206 Pb and 208 Pb) implanted in an aluminum cylinder. Since these two rods show the same gamma-ray attenuation in atomic processes, it is impossible to differentiate between them using a standard Gamma-CT technique based on atomic attenuation of gamma rays. The LCS gamma-ray beam had a maximum energy of 5.528 MeV and an intensity of approximately 5.5 photons/s/eV at the resonance energy ( Jπ=1− at 5.512 MeV in 208 Pb). A lead collimator with a hole diameter of 1 mm was used to define the size of the LCS gamma-ray beam at the CT target. The CT image of the 208 Pb rod was selectively obtained with a 2-mm pixel size resolution, which was determined by the horizontal step size of the CT stage. |
著作権等: | This work is licensed under a Creative Commons Attribution 4.0 License. Formore information, see https://creativecommons.org/licenses/by/4.0/ |
URI: | http://hdl.handle.net/2433/254063 |
DOI(出版社版): | 10.1109/tns.2020.3004565 |
出現コレクション: | 学術雑誌掲載論文等 |
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