Development of proton CT system with sub-millimeter spatial resolution for treatment plan for particle therapy

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K20657
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 90110:Biomedical engineering-related
• Research Institution: Tohoku University
• Principal Investigator: Tanaka Kazuo 東北大学, サイクロトロン・ラジオアイソトープセンター, リサーチフェロー (20780860)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 陽子線治療

Outline of Final Research Achievements

Treatment plan of proton therapy is based on a computerized tomography (CT) scan so far.
However, the reconstruction of the electron density distribution from CT scan has a large uncertainty due to the Compton scattering effect of photons. Thus there has been plenty of research on the proton CT, scanning with proton beam to obtain the electron density.
We developed ridge filter to broaden the proton-beam energy distribution to optimize the dose distribution for the target area from a treatment plan.

Free Research Field

素粒子・原子核

Academic Significance and Societal Importance of the Research Achievements

本研究ではCYRICのサイクロトロン加速器から供給される陽子ビームを用いた測定により、要旨の散乱による強度減衰効果も加味したリッジフィルタ設計のパラメータ決定を行った。これにより家庭用の３Dプリンタを用いても陽子線CT研究に十分用いることができるリッジフィルタを製作することが可能となった。