Development of a multi-axis cone beam CT for accurate non-destructive testing of electronic equipment

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14753
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 21030:Measurement engineering-related
• Research Institution: Tokyo University of Science
• Principal Investigator: Kano Toru 東京理科大学, 工学部情報工学科, 助教 (40781620)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: X線CT / メタルアーチファクト / 画像再構成

Outline of Final Research Achievements

X-ray CT, which can acquire cross-sectional images of an object non-destructively, generates severe noise called metal artifact when metal is included in the object. In this study, we proposed a cone-beam X-ray CT equipped with a multi-axis rotation mechanism and attempted to reduce metal artifacts from two viewpoints: as a hardware approach, we optimized the rotation trajectory based on the X-ray transmitted intensity distribution; as a software approach, we proposed a new trajectory interpolation calculation. Simulation experiments on numerical phantoms with the physical properties of resin, iron, and aluminum confirmed that both approaches could reduce artifacts qualitatively and quantitatively.

Free Research Field

計測工学

Academic Significance and Societal Importance of the Research Achievements

X線CTで金属を含む被写体を撮影するケースは多く、メタルアーチファクトは医療・産業現場で大きな問題となっている。本研究では、産業現場での利用を想定し、メタルアーチファクトを低減するための新しい多軸X線CTを提案した。本技術は、これまで困難であった、金属を含む工業製品が高精度非破壊検査の実現に繋がるものである。さらには、医療現場においても、診断精度の向上に寄与することが期待される。