New high energy imaging method by using electron beam and x-ray hybrid

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K15348
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Medical Physics and Radiological Technology
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: Myojoyama Atsushi 首都大学東京, 人間健康科学研究科, 准教授 (90347279)
• Research Collaborator: Imai Ryo ; Morita Kyohei ; Nakao Minami
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: スキャニング / 電磁石 / ソレノイド

Outline of Final Research Achievements

In this study, we focused on the acquisition of high-contrast images for the efficient generation of photons from electron beams by magnetic fields using electromagnets. A method of acquiring images by scanning the electron beam using focusing electromagnets and deflection electromagnets was proposed. By the results, it showed that the convergence of the electron of about 1 mm was possible at the minimum as a result of the EPID iamges and the ionization chamber. It has also been shown that setting of the irradiation position is possible by control of the power supply device by programming. In addition to this, we proposed a detection device that can accurately measure photons with energy of 300 keV or more, and completed the basic part of the new image generation method.

Free Research Field

放射線治療物理学

Academic Significance and Societal Importance of the Research Achievements

X線撮像において極小照射野X線のスキャニングによる画像取得は、理論的には多くの発表があるがそれを実現することは困難であった。本研究ではそれを医療用直線加速装置の電子線スキャニングという簡便な方法で実現することに成功している。この手法の応用により、さらなる画質向上や線量削減、散乱線の解析による3次元画像再構成等に応用可能であると考える。