Non-destructive inspection of large structures using backscatter X-ray tomography

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630430
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear engineering
• Research Institution: Nagoya University
• Principal Investigator: WATANABE Kenichi 名古屋大学, 工学(系)研究科(研究院), 准教授 (30324461)
• Co-Investigator(Kenkyū-buntansha): YAMAZAKI Atsushi 名古屋大学, 大学院工学研究科, 助教 (10436537)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 後方散乱X線 / トモグラフィ / 大型構造物診断

Outline of Final Research Achievements

As development of backscatter X-ray tomography for non-destructive inspection of large structures, we conducted construction of a prototype system, consideration of optimum image reconstruction and performance evaluation for the developed system. We constructed the prototype backscatter X-ray tomography system consisting of a X-ray tube, a medical X-ray flat-panel detector and parallel plate collimators. Parameters of the parallel plate collimators were concluded to be 0.5mm thick and 0.5mm spacing. ML-EM method was considered to be optimum as an image reconstruction algorithm. Consequently, we successfully obtained a tomographic image with backscatter X-ray system when the parallel plate collimator was set in seven directions with 15 degrees pitch. We concluded that the backscatter X-ray system is feasible as non-destructive inspection for large structures.

Free Research Field

放射線計測