2022 Fiscal Year Final Research Report
Revolution of sample observation:Non-destructive 3D chemical compositional intensity mapping by innovative X-ray CT technology
| Project/Area Number |
20K20941
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 17:Earth and planetary science and related fields
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Project Period (FY) |
2020-07-30 – 2023-03-31
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| Keywords | 光子係数型CT / 岩石非破壊観察 |
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| Outline of Final Research Achievements |
We report the first results of applying PC-CT to basic minerals such as quartz and calcite. In the low-energy range, PC-CT produced higher contrast images than conventional CT. Minerals were successfully identified from the relationships between the mean CT values for each energy window and the mean difference between pairs of energy windows. These results suggest that PC-CT can produce high-contrast images of minerals and may be able to distinguish mineral phases with different attenuation curves, even when their CT values are similar. Given some prior knowledge of mineral phases from other methods, it may be possible to use PC-CT imaging to obtain further information about their chemical compositions.
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| Free Research Field |
地球惑星科学
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| Academic Significance and Societal Importance of the Research Achievements |
固体試料を非破壊でその内部にどのような物質がどのように分布しているのかを明らかにすることは、岩石試料を取り扱う時に試料を粉砕する前の情報を得るために極めて重要である。本研究ではこれまで行われてきた通常のCT像と比較して、新しい光子係数型CTを世界で初めて岩石試料に適用し、通常CTよりもよりコントラストのつく画像を得られることだけでなく、前もって、予想される物質がある場合は、CT値情報だけで、それらをそれらの物質と認識して分別できる可能性を示唆した。これらの結果は、通常のCTのその先の未来の新しい非破壊内部観察装置の開発に向けた貴重なデータの提示となる。
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