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2018 Fiscal Year Final Research Report

Study on high resolution and large diameter crystal growth of phase-separated scintillator with light guiding property by controlling the order structure

Research Project

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Project/Area Number 16H04505
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Composite materials/Surface and interface engineering
Research InstitutionTohoku University

Principal Investigator

Yoshikawa Akira  東北大学, 金属材料研究所, 教授 (50292264)

Co-Investigator(Kenkyū-buntansha) 黒澤 俊介  東北大学, 未来科学技術共同研究センター, 准教授 (80613637)
Project Period (FY) 2016-04-01 – 2019-03-31
Keywordsシンチレータ / X線検出器 / 共晶体 / 結晶成長
Outline of Final Research Achievements

We have studied on phase-separated eutectic scintillator and developed the 1μm resolution detector. ① On the basis of GdAlO3/ Al2O3 composition, we optimized the eutectic composition and growth direction by considering the crystal structure change with cation substitutions and the acceptable angular errors between each phases. ② We succeeded to grow phase-separated eutectic crystal with large diameter by the micro-pulling down method and EFG method. ③ X-ray phase-imaging detector combined with a CCD camera was developed and prove our concept “super high resolution using phase-separated eutectic scintillation detector”.

Free Research Field

結晶工学

Academic Significance and Societal Importance of the Research Achievements

本研究では、光導波性獲得を目標とした、元素置換による構造制御、配向性制御を系統的に研究した。共晶相の微細組織をバルクのスケールで制御するには共晶相図、界面の方位制御、面内温度分布の均質性等が相互に影響しあうため、その体系的な理解は結晶成長研究分野における学術的な意義も大きい。今回開発したX線位相イメージング検出器は従来見えなかった癌病巣、高齢者に患者が多い関節リウマチ・変形性膝関節症における軟骨という軟組織のX線位相イメージングを可能となる装置の実現に繋がり、早期発見により重症化前治療を可能にすることで生活の質(QOL)の向上に資する。

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Published: 2020-03-30  

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