• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of a therapeutic effect evaluation system that simultaneously considers the dose rate of proton beam irradiation and LET fluctuations

Research Project

Project/Area Number 18K07621
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionHokkaido University

Principal Investigator

Matsuura Taeko  北海道大学, 工学研究院, 准教授 (90590266)

Co-Investigator(Kenkyū-buntansha) 平山 嵩祐  北海道大学, 医学研究院, 特任助教 (00769177)
安井 博宣  北海道大学, 獣医学研究院, 准教授 (10570228)
高尾 聖心  北海道大学, 大学病院, 助教 (10614216)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords陽子線生物効果 / 陽子線生物モデル / 亜致死損傷回復 / 陽子線生物 / LET
Outline of Final Research Achievements

In the scanning beam delivery of protons, different portions of the target are irradiated with different linear energy transfer protons with various time intervals and irradiation times. To evaluate the sublethal damage (SLD) repair effect in prolonged scanning proton irradiation using the biophysical model, we extended the dose protraction factor in the LQ model for the arbitrary number of different LET proton irradiations delivered sequentially with arbitrary time lags, referring to the theory of dual radiation action (TDRA). The model enables us to evaluate the biological effectiveness in clinical settings within a reasonable calculation time. In addition, we have performed the cell experiment using proton beam to investigate the LET dependence of the SLD repair time.

Academic Significance and Societal Importance of the Research Achievements

近年の陽子線治療の進展として,物理的な照射精度の高度化に加え,生物線量分布の高精度化が重要視されている.これは,陽子線のLETの違いが治療効果に与える生物学的影響を考慮した治療を目指すものである.実際,治療成績に関する報告でも,LETと治療効果の相関が見られている.一方で,陽子線治療の高度化とともに,スキャニング法を用いた動きのある部位への照射の割合が増えており,また,寡分割治療への試みも始まっている.このような治療では,照射時間の延長によって治療効果が低下する可能性がある.本研究はこれらの効果を同時に考慮できるモデルを構築し,症例に対する効果予測を可能にした.

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (12 results)

All 2022 2021 2020 2019 2018

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Impact of a spatially dependent dose delivery time structure on the biological effectiveness of scanning proton therapy2021

    • Author(s)
      Kasamatsu Koki、Tanaka Sodai、Miyazaki Koichi、Takao Seishin、Miyamoto Naoki、Hirayama Shusuke、Nishioka Kentaro、Hashimoto Takayuki、Aoyama Hidefumi、Umegaki Kikuo、Matsuura Taeko
    • Journal Title

      Medical Physics

      Volume: 49 Issue: 1 Pages: 702-713

    • DOI

      10.1002/mp.15367

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The impact of dose delivery time on biological effectiveness in proton irradiation with various biological parameters2020

    • Author(s)
      Kasamatsu Koki、Matsuura Taeko、Tanaka Sodai、Takao Seishin、Miyamoto Naoki、Nam Jin‐Min、Shirato Hiroki、Shimizu Shinichi、Umegaki Kikuo
    • Journal Title

      Medical Physics

      Volume: 47 Issue: 9 Pages: 4644-4655

    • DOI

      10.1002/mp.14381

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Difference in LET‐based biological doses between IMPT optimization techniques: Robust and PTV‐based optimizations2020

    • Author(s)
      Hirayama Shusuke、Matsuura Taeko、Yasuda Koichi、Takao Seishin、Fujii Takaaki、Miyamoto Naoki、Umegaki Kikuo、Shimizu Shinichi
    • Journal Title

      Journal of Applied Clinical Medical Physics

      Volume: - Issue: 4 Pages: 1-9

    • DOI

      10.1002/acm2.12844

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Physical and biological impacts of collimator-scattered protons in spot-scanning proton therapy2019

    • Author(s)
      Ueno Koki、Matsuura Taeko、Hirayama Shusuke、Takao Seishin、Ueda Hideaki、Matsuo Yuto、Yoshimura Takaaki、Umegaki Kikuo
    • Journal Title

      Journal of Applied Clinical Medical Physics

      Volume: 20 Issue: 7 Pages: 48-57

    • DOI

      10.1002/acm2.12653

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A novel range-verification method using ionoacoustic wave generated from spherical gold markers for particle-beam therapy: a simulation study2019

    • Author(s)
      T. Takayanagi, T. Uesaka, M. Kitaoka, MB.Unlu, K.Umegaki, H. Shirato, L. Xing, T. Matsuura
    • Journal Title

      Sci. Rep.

      Volume: 9 Issue: 1 Pages: 4011-4011

    • DOI

      10.1038/s41598-019-38889-w

    • NAID

      120006626576

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 北海道大学における陽子線医学物理研究の現状とこれから2022

    • Author(s)
      松浦妙子
    • Organizer
      第123回 日本医学物理学会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Influence of Sub-Lethal Damage Repair On Biological Effectiveness of Proton with the Consideration of Dose Delivery Time Structure in Scanning Proton Therapy2021

    • Author(s)
      K Kasamatsu, H Hosoi, S Tanaka, K Miyazaki, S Takao, N Miyamoto, K Umegaki, T Hashimoto, K Nishioka, S Shimizu, T Matsuura
    • Organizer
      AAPM 63rd Annual Meeting & Exhibition
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inclusion of Energy Layer Structure into an Evaluation of Dose Delivery Time Effect in Scanning Proton Therapy2021

    • Author(s)
      Koki Kasamatsu
    • Organizer
      日本医学物理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] SLD Repair Impact On Treatment Effectiveness of Proton Therapy with Various Cell Specific Parameters2020

    • Author(s)
      K Kasamatsu, T Matsuura, S Tanaka, K Umegaki
    • Organizer
      Joint AAPM/COMP meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dependence of the Sub-Lethal Damage Repair Rate on LET in Proton Irradiation: An Initial Study2019

    • Author(s)
      Koki Kasamatsu, Memu Hosoda, Jin-Min Nam, Hironobu Yasui, Sodai Tanaka, Shusuke Hirayama, Naoki Miyamoto, Kikuo Umegaki, Hiroki Shirato, Taeko Matsuura
    • Organizer
      第118回日本医学物理学会学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] An Investigation of Biological Impact Caused by Edge-Scattered Protons in Pencil Beam Scanning Proton Therapy2018

    • Author(s)
      K.Ueno, T. Matsuura, S. Takao, S. Hirayama, H. Ueda, Y. Matsuo, T. Yoshimura, S. Shimizu, K. Umegaki, H. Shirato
    • Organizer
      AAPM 60th Annual Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Study On the Influence of Changing the Motion Recognition Rate On the Dose Accuracy of2018

    • Author(s)
      T. Sodeta, T. Matsuura, S. Takao, S. Hirayama, T. Kanehira, N. Miyamoto, K. Nishioka, N. Kato, S. Shimizu, K. Umegaki, H. Shirato
    • Organizer
      AAPM 60th Annual Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2018-04-23   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi