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Development of a Real-time Range Verification Method Suitable for Ultra-High Dose Rate Proton Therapy

Research Project

Project/Area Number 21K19434
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 52:General internal medicine and related fields
Research InstitutionHokkaido University

Principal Investigator

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

Co-Investigator(Kenkyū-buntansha) 田中 創大  国立研究開発法人量子科学技術研究開発機構, 量子医科学研究所 物理工学部, 主任研究員 (00826092)
富岡 智  北海道大学, 工学研究院, 教授 (40237110)
橋本 孝之  北海道大学, 医学研究院, 教授 (60400678)
栗山 靖敏  京都大学, 複合原子力科学研究所, 助教 (60423125)
Project Period (FY) 2021-07-09 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords陽子線治療 / イオン音響 / FLASH / 超高線量率陽子線治療 / 飛程検証技術 / 超高線量率陽子線照射 / 陽子線飛程検証 / 適応型陽子線治療 / 音響計測
Outline of Research at the Start

FLASH放射線治療は,通常の放射線治療の線量率の数百倍から数千倍高い線量率を用いる超高線量率照射法である.抗腫瘍効果を変えずに正常組織の障害発生を顕著に抑制できることが知られており,治療様式を大きく変えるインパクトがある.本研究では,近い未来に臨床利用が期待される超高線量率陽子線治療に適用するリアルタイム飛程検出法の実用化に向けた基盤技術開発を行う.現在,陽子線飛程を照射中に正確に検出し,予測と違う場合には即座に補正を加える方法が提案されている.我々はその一つとして,超高線量率で威力を発揮する音響技術に着目し,GPSで実績のあるMultilateration法を組み合わせた手法を開発する.

Outline of Final Research Achievements

This study aims to develop a method for real-time and high-precision detection of the proton range in ultra-high dose rate radiation therapy. As a means of range detection, we focused on acoustic waves generated by ultra-high dose rate proton irradiation, and aimed to achieve range detection and miniaturization of the detection system by utilizing them. While conventional range detection studies have mainly used methods employing single detectors, this study aims to construct a method for three-dimensional localization of the proton range based on signals detected by multiple detectors. We devised two methods: (1) a method using a sensitivity matrix, and (2) a method using delay-and-sum (DAS) reconstruction, and verified their accuracy through experiments.

Academic Significance and Societal Importance of the Research Achievements

本研究は、FLASH放射線治療における陽子線飛程のリアルタイム高精度検出に向けた基礎的な検討を行うものである。学術的には、複数の検出器を用いた三次元飛程特定法の開発は、従来の単一検出器法を拡張するものであり、計測精度の向上に繋がる可能性がある。社会的意義としては、直ちに臨床応用されるものではないが、FLASH陽子線治療の実現に向けた技術的課題の解決に貢献する可能性がある。研究が進展し、より高精度な飛程検出が可能になれば、FLASH治療の安全性を向上させ、臨床応用を促進することが期待される。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (23 results)

All 2025 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results) Presentation (17 results) (of which Int'l Joint Research: 10 results,  Invited: 8 results)

  • [Int'l Joint Research] Bogazici University(トルコ)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Accuracy verification of protoacoustic measurements in a heterogeneous phantom by an optical hydrophone2024

    • Author(s)
      Chen Ye、Kasamatsu Koki、Kuriyama Yasutoshi、Uesugi Tomonori、Ishi Yoshihiro、Murakami Taichi、Hidani Sena、Caulfield Michael、Unlu Mehmet Burcin、Rohringer Wolfgang、Matsuura Taeko
    • Journal Title

      Medical Physics

      Volume: 52 Issue: 3 Pages: 1893-1902

    • DOI

      10.1002/mp.17575

    • Related Report
      2024 Annual Research Report
  • [Journal Article] PP04.01 ACCURACY ASSESSMENT OF PROTOACOUSTIC WAVE SIMULATION IN HETEROGENEOUS PHANTOMS2024

    • Author(s)
      Chen Y.、Kasamatsu K.、Kuriyama Y.、Uesugi T.、Ishi Y.、Matsuura T.
    • Journal Title

      Physica Medica

      Volume: 125 Pages: 103631-103631

    • DOI

      10.1016/j.ejmp.2024.103631

    • Related Report
      2024 Annual Research Report
  • [Journal Article] Technical note: Application of an optical hydrophone to ionoacoustic range detection in a tissue‐mimicking agar phantom2023

    • Author(s)
      Sueyasu Shota、Kasamatsu Koki、Takayanagi Taisuke、Chen Ye、Kuriyama Yasutoshi、Ishi Yoshihiro、Uesugi Tomonori、Rohringer Wolfgang、Unlu Mehmet Burcin、Kudo Nobuki、Yokokawa Kohei、Takao Seishin、Miyamoto Naoki、Matsuura Taeko
    • Journal Title

      Medical Physics

      Volume: - Issue: 7 Pages: 5130-5141

    • DOI

      10.1002/mp.16892

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Ionoacoustic application of an optical hydrophone to detect proton beam range in water.2022

    • Author(s)
      Shota Sueyasu, Taisuke Takayanagi, Koichi Miyazaki, Yasutoshi Kuriyama, Yoshihiro Ishi, Tomonori Uesugi, Mehmet Burcin Unlu, Nobuki Kudo, Ye Chen, Koki Kasamatsu, Masayuki Fujii, Masanori Kobayashi, Wolfgang Rohringer, Taeko Matsuura
    • Journal Title

      medical physics

      Volume: - Issue: 4 Pages: 1-12

    • DOI

      10.1002/mp.16189

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Technical Note: Range verification of pulsed proton beams from fixed‐field alternating gradient accelerator by means of time‐of‐flight measurement of ionoacoustic waves2021

    • Author(s)
      Nakamura Yuta、Takayanagi Taisuke、Uesaka Tomoki、Unlu Mehmet Burcin、Kuriyama Yasutoshi、Ishi Yoshihiro、Uesugi Tomonori、Kobayashi Masanori、Kudo Nobuki、Tanaka Sodai、Umegaki Kikuo、Tomioka Satoshi、Matsuura Taeko
    • Journal Title

      Medical Physics

      Volume: 48 Issue: 9 Pages: 5490-5500

    • DOI

      10.1002/mp.15060

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 陽子線音響波計測に基づく体内阻止能比推定手法の開発:感度行列法の検討2025

    • Author(s)
      Taichi Murakami, Taisuke Takayanagi, Koki Kasamatsu, Ye Chen, Taeko Matsuura
    • Organizer
      高精度放射線外部照射部会学術大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Experimental Dose Reconstruction using Protoacoustic Measurements taken with an Optical Hydrophone2025

    • Author(s)
      Michael Caulfield, Taichi Murakami, Ye Chen, Kohei Yokokawa, Naoki Miyamoto, Seishin Takao, Yasutoshi Kuriyama, Tomonori Uesugi, Yoshihiro Ishi
    • Organizer
      高精度放射線外部照射部会学術大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Protoacoustic Measurement for Localizing Bragg Peak in Proton Therapy2024

    • Author(s)
      Taeko Matsuura
    • Organizer
      第66回アメリカ医学物理学会
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Protoacoustic Measurement for Localizing Bragg Peak in Proton Therapy Using FFA2024

    • Author(s)
      Taeko Matsuura
    • Organizer
      International Workshop on Fixed Field Alternating Gradient Accelerators (FFA'24)
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Accuracy assessment of protoacoustic wave simulation in heterogeneous phantoms,2024

    • Author(s)
      Taeko Matsuura, Ye Chen, Taichi Murakami, Sena Hidani, Koki Kasamatsu, Yasutoshi Kuriyama, Tomonori Uesugi, Yoshihiro Ishi
    • Organizer
      ECMP2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of probe head designs for protoacoustics measurement using an optical hydrophone2024

    • Author(s)
      S. Hidani, Y. Chen, T. Nonoyama, K. Kasamatsu, T. Murakami, K. Yokokawa, N. Miyamoto, S. Takao, T. Matsuura
    • Organizer
      The 10th Japan-Korea Joint Meeting on Medical Physics
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental assessment of the accuracy of a protoacoustic wave simulation using an optical hydrophone2024

    • Author(s)
      T. Murakami, Y. Chen, K. Kasamatsu, Y. Kuriyama, T. Uesugi, Y. Ishi, S. Hidani, K. Yokokawa, N. Miyamoto, S. Takao, T. Matsuura,
    • Organizer
      The 10th Japan-Korea Joint Meeting on Medical Physics
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ultrasound in Real Time Adaptive Radiotherapy2024

    • Author(s)
      Taeko Matsuura
    • Organizer
      AAPM 66th
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 次世代陽子線シンポジウム:陽子線から発生する音を使った飛程検証法の実現に向けて2023

    • Author(s)
      Taeko Matsuura
    • Organizer
      第126回日本医学物理学会
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Initial study on the measurement of ionoacoustic waves generated from an abdominal phantom after the injection of pulsed proton beams2023

    • Author(s)
      Sena Hidani, Koki Kasamatsu, Ye Chen, Yasutoshi Kuriyama, Yoshihiro Ishi, Tomonori Uesugi, Kohei Yokokawa, Seishin Takao, Naoki Miyamoto, Taeko Matsuura
    • Organizer
      第126回日本医学物理学会
    • Related Report
      2023 Research-status Report
  • [Presentation] 陽子線音響技術を使った高精度陽子線がん治療の実現に向けて2023

    • Author(s)
      Taeko Matsuura
    • Organizer
      第9回部局横断シンポジウム
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Proton range detection using a spherical resonance ionoacoustic wave emitted from a gold fiducial marker embedded in an agar phantom2023

    • Author(s)
      Taeko Matsuura, Shota Sueyasu, Koki Kasamatsu, Ye Chen et al.
    • Organizer
      61st Particle Therapy Co-Operative Group
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Miniature Optical Hydrophone for Detecting Proton Beam Range at Clinical Dose: An Initial Study2022

    • Author(s)
      Shota Sueyasu, Yuhei Sakuyama, Koichi Miyazaki, Mehmet Burcin Unlu, Yasutoshi Kuriyama, Yoshihiro Ishi, Tomonori Uesugi, Masayuki Fujii, Masanori Kobayashi, Nobuki Kudo, Ye Chen, Taeko Matsuura
    • Organizer
      AAPM
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Reduction of Detector Misalignment Errors in Ionoacoustic Range Detection by Using a Miniature Laser Interferometer Hydrophone2022

    • Author(s)
      S. Sueyasu, Y. Nakamura, Y. Sakuyama, T. Takayanagi, K, Miyazaki M. Kobayashi, Y. Yamauchi, N. Koshizaki, S. Tomioka, T. Matsuura
    • Organizer
      医学物理学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 陽子線治療における医学物理研究の現状と今後の展望2022

    • Author(s)
      松浦妙子
    • Organizer
      医学物理学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Range verification of pulsed proton beams using ionoacoustics2022

    • Author(s)
      Taeko Matsuura
    • Organizer
      The 8th GCB Biomedical Science and Engineering Symposium
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Ultrasonic waves to verify proton beam ranges in radiotherapy2021

    • Author(s)
      Taeko Matsuura
    • Organizer
      ブラジル物理学会
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2021-07-13   Modified: 2026-01-16  

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