Test Technologies Contributing to Electrification - 6. X-ray CT Nondestructive Measurement Technology Supporting Vehicle Body Weight Reduction TechnologyFig. 11 CT images of a test piece of iron and CFRP bonded 5. Summary6. Prospects of measurement technology using X-ray CTtogetherReferencesThus, a correlation with the tensile strength was obtained, which provides feedback on the molding conditions.There is an urgent need to understand the mechanisms linking performance and structure to efficiently realize new structures in this era of innovation in vehicle manufacturing. The effect of using metal filters to reduce metal artifact noise in X-ray CT is not limited to vehicle body weight reduction. High effectiveness was also demonstrated in the visualization of complex structures such as motors and batteries consisting of a variety of materials. As a powerful measurement technology in electric vehicle development, this technique is expected to help solve the trade-off between high quality and low cost and to contribute toward the development of attractive products.Industrial X-ray CT is utilized globally and is expected to develop into a measurement technology that guarantees the uncertainty of the profile and dimensions. This technique is expected to enhance manufacturing competitiveness, which will play a significant role in the metrological traceability system through digital twin development used in digital engineering such as computer aided engineering and data-driven development such as materials informatics. By extension, this will lead to highly efficient development in the automotive industry, which requires a large labor force and energy in an era of a declining working population. （1） NEDO 材料・ナノテクノロジー部：革新的新構造材料等研究開発」（中間評価）（2014年度〜2022年度9年間）（2） 公益社団法人自動車技術会2020年秋季大会学術講演会：マルチマテリアル部品における欠陥評価の高精度化に向けたX線CT画像のノイズ低減手法（濱名雅之、臼井徳貴；日産自動車）（3） 日本放射線技術学会雑誌Vol.74 No.4 Apr2018：相対artifact indexによるノイズ特性に依存しないストリークアーチファクト定量評価法の提案（高田賢、坂野信也、乙部克彦；大垣市民病院医療技術部診療検査科、市川勝弘；金沢大学医療保険学域保険学類）（4） 東京都立産業技術研究センター研究報告，第7号，2012年：X線CT画像計測技術による上流技術支援システムの構築（紋川亮、中川朋恵、金城康人、桜井昇、永川栄泰、藤井恭子；バイオ応用技術グループ、横山幸雄；システムデザインセクター）65
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