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Title: Demonstration of tomographic imaging of isotope distribution by nuclear resonance fluorescence
Authors: Zen, Heishun
Ohgaki, Hideaki
Taira, Yoshitaka
Hayakawa, Takehito
Shizuma, Toshiyuki
Daito, Izuru
Yamazaki, Jun-ichiro
Kii, Toshiteru
Toyokawa, Hiroyuki
Katoh, Masahiro
Author's alias: 全, 炳俊
大垣, 英明
紀井, 俊輝
Issue Date: Mar-2019
Publisher: AIP Publishing
Journal title: AIP Advances
Volume: 9
Issue: 3
Thesis number: 035101
Abstract: Computed Tomography (CT) using X-ray attenuation by atomic effects is now widely used for medical diagnosis and industrial non-destructive inspection. In this study, we performed a tomographic imaging of isotope (²⁰⁸Pb) distribution by the Nuclear Resonance Fluorescence (NRF), i.e. isotope specific resonant absorption and scattering of gamma rays, using Laser Compton Scattering (LCS) gamma rays. The NRF-CT image which includes both effects of atomic attenuation and nuclear resonant attenuation was obtained. By accounting for the atomic attenuation measured by a conventional method at the same time, a clear ²⁰⁸Pb isotope CT image was obtained. The contrast degradation due to notch refilling caused by small-angle Compton scattering is discussed. This study clearly demonstrates the capability of the isotope-specific CT imaging based on nuclear resonant attenuation which will be a realistic technique when the next generation of extremely intense LCS gamma-ray sources will be available. The expected image acquisition time using these intense LCS gamma rays was discussed.
Rights: © 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
URI: http://hdl.handle.net/2433/243832
DOI(Published Version): 10.1063/1.5064866
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