Selective Isotope CT Imaging Based on Nuclear Resonance Fluorescence Transmission Method
| Autor: | Gabriel Turturica, Heishun Zen, C. A. Ur, Yoshitaka Taira, Takehito Hayakawa, Violeta Iancu, Masaki Fujimoto, Hiroyuki Toyokawa, Masahiro Katoh, Toshiteru Kii, Khaled Ali, Hideaki Ohgaki, Toshiyuki Shizuma |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Nuclear and High Energy Physics
Photon Materials science Astrophysics::High Energy Astrophysical Phenomena Synchrotron radiation 01 natural sciences law.invention Optics law 0103 physical sciences Electrical and Electronic Engineering Computed tomography (CT) nuclear resonance fluorescence (NRF) 010308 nuclear & particles physics business.industry Compton scattering Gamma ray Resonance Collimator Synchrotron Nuclear Energy and Engineering Nuclear resonance fluorescence Physics::Accelerator Physics laser Compton scattering (LCS) gamma-ray beam business isotope distribution |
| Zdroj: | IEEE Transactions on Nuclear Science. 67(8):1976-1984 |
| ISSN: | 0018-9499 |
| Popis: | 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 (206Pb and 208Pb) 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 ( $J^{\pi } = 1^{-}$ at 5.512 MeV in 208Pb). 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 208Pb rod was selectively obtained with a 2-mm pixel size resolution, which was determined by the horizontal step size of the CT stage. |
| Databáze: | OpenAIRE |
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