Influence evaluation of fragments in dose distribution measurements for particle therapy by using thermoluminescent dosimeters

• Project/Area Number: 25390129
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: Kindai University
• Principal Investigator: WAKABAYASHI Genichiro 近畿大学, 原子力研究所, 准教授 (90311852)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: 組織等価ファントム熱ルミネセンス線量計 / 重粒子線 / フラグメント粒子 / 線量分布測定 / 二次中性子 / 中性子

Outline of Final Research Achievements

This study was carried out to measure the fragments produced in a tissue equivalent phantom thermoluminescent dosimeter (TEP-TLD) irradiated by a particle therapeutic beam. Several experiments were performed to check detector performance by using the heavy ion medical accelerator HIMAC at NIRS after the dose and fluence distribution of each fragment produced in TEP-TLDs and tough water phantoms as targets was simulated. As result, it was found that the performance of the detector system was largely influenced by activation by secondary neutrons in treatment field.

Research Products

• [Journal Article] Absorbed dose estimation using LET dependence in glow curve of thermoluminescent phosphor Li3B7O12:Cu in therapeutic carbon beam (2016)
  • Author(s): Weishan Chang, Yusuke Koba, Shigekazu Fukuda, Genichiro Wakabayashi, Hidetoshi Saitoh, Kiyomitsu Shinsho
  • Journal Title: Journal of Nuclear Science and Technology Volume: 53 Issue: 12 Pages: 2028-2033
  • DOI: 10.1080/00223131.2016.1181010
  • Peer Reviewed
• [Journal Article] 熱蛍光板状線量計による重粒子線の線量と線質分布に関する研究 (2016)
  • Author(s): 眞正浄光、古場裕介、福田茂一、若林源一郎、川路康之、大坪圭介、張維珊、大島梨奈、小山千絵、栁澤伸、齋藤雄介
  • Journal Title: 平成27年度放射線医学総合研究所重粒子線がん治療装置等共同利用研究報告書 Volume: NIRS-M-289 Pages: 234-235
• [Presentation] 重粒子線治療場における CsI シンチレータの放射化を用いた中性子測定 (2015)
  • Author(s): 鷲尾知也、向井崇一郎、吉中悠二、若林源一郎、納冨昭弘、眞正浄光、古場裕介
  • Organizer: 日本原子力学会2015年秋の大会
  • Place of Presentation: 静岡大学
  • Year and Date: 2015-09-09
• [Presentation] 重粒子線照射場におけるCsI(Tl)シンチレータの放射化 (2015)
  • Author(s): 鷲尾知也、若林源一郎、納冨昭弘、眞正浄光、古場裕介
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学湘南キャンパス（神奈川県）
  • Year and Date: 2015-03-12
• [Presentation] Activation of CsI(Tl) scintillator at heavy-ion irradiation field (2015)
  • Author(s): T. Washio, G. Wakabayashi, A. Nohtomi, K. Shinsho, Y. Koba
  • Organizer: The 10th International Workshop on Ionizing Radiation Monitoring
  • Place of Presentation: Oarai, Japan（茨城県）
  • Year and Date: 2015-03-01