Development of monitoring method of irradiation depth in body by measuring low energy photons for heavy ion therapy

2014 Fiscal Year Final Research Report

• Project/Area Number: 25871094
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Medical systems; Biomedical engineering/Biomaterial science and engineering
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: YAMAGUCHI Mitsutaka 独立行政法人日本原子力研究開発機構, 原子力科学研究部門 高崎量子応用研究所 放射線高度利用施設部, 研究員 (10375404)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: ビームモニタリング / 粒子線治療 / 二次電子 / 制動輻射 / モンテカルロシミュレーション

Outline of Final Research Achievements

Realtime monitoring methods of irradiated ions are important techniques to improve reliability of particle therapies. The purpose of this research is to develop an estimation method of particle range position by measuring low energy photons. Firstly, by a result of a Monte Carlo simulation, it was found that emitting particles from irradiated target consist of the secondary electron bremsstrahlung. Based on this result, an experiment was performed by using a prototype machine of realtime monitoring. By the experiment, it was found that the elimination of a background component which consist of scattered photons is essential for the realization of this monitoring method and the elimination is able to be done by optimizing the thickness of a detector.

Free Research Field

放射線検出技術