Material Identification from X-Ray Images Made with Energy-Differentiation Type Radiation Line Sensor

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  • Matsumoto Masao
    Division of Health Science, Graduate School of Medicine, Osaka University
  • Takayama Naoki
    Division of Health Science, Graduate School of Medicine, Osaka University

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Other Title
  • エネルギー弁別型放射線ラインセンサを用いたX線像による被写体の材質の識別
  • エネルギー ベンベツガタ ホウシャセン ラインセンサ オ モチイタ Xセンゾウ ニ ヨル ヒシャタイ ノ ザイシツ ノ シキベツ

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Abstract

It was confirmed that linear attenuation coefficient and effective atomic number of objects (carbon, Poly methyl methacrylate (PMMA), aluminum) could be identified by X-ray 2D and CT images discriminated by different energy. The difference ratio between theoretical and experimental values of linear attenuation coefficient of each object obtained from X-ray images were 0.01–22.6% for carbon, 0.01–23.1% for PMMA at photon energy from 50 to 80 keV, and 0.07–22.1% for aluminum at photon energy from 60 to 100 keV. The effective atomic number of each object from X-ray images was obtained as 6.0±0.3 for carbon (Z=6.0), 6.48±1.38 for PMMA (Z=6.48), and 13.0±0.3 for aluminum (Z=13.0). But, these differences of theoretical and measured effective atomic numbers are large relatively, and it is necessary to perform a further examination for the improvement for practical use of the material identification from X-ray images.<br>

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