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Development of a novel photochromic dosimetry film

Research Project

Project/Area Number 19K17213
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Tamura Mikoto  近畿大学, 医学部, 助教 (60810968)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsフォトクロミック化合物 / ジアリールエテン / 医用放射線 / 放射線線量計 / フィルム線量測定 / X線 / 電子線 / フォトクロミックフィルム / 荷電粒子線
Outline of Research at the Start

医療におけるフィルムを用いた線量測定は、放射線治療における2次元線量分布の取得や個人被ばく線量の管理などに用いられる。フォトクロミック分子による化学反応でX線を高感度に可視化できる色素が本邦で開発された。本研究では、フォトクロミックフィルムの医療における線量測定へのポテンシャルを見極め、様々な放射線(X線、電子線、陽子線、炭素線など)に対応可能、簡便で安価、優れた空間分解能、迅速な結果の取得可能な新規フィルムの開発を目指す。

Outline of Final Research Achievements

Radiochromic film (RCF) is commonly used as a measurement tool in clinical practice. However, the results are not immediately available, it takes from several hours to 24 h, and expensive. We aimed to develop a novel film with diarylethene (DAE) as one of photochromic molecules, which could visualize the radiation dose by chemical reaction, to overcome the disadvantages of the RCF. The DAE film was found to achieve the sensitivity to the kV X-ray with a range suitable for clinical uses. It can be analyzed immediately after irradiation. It is anticipated the DAE film can be used in clinical practice, such as radiation diagnostics and brachytherapy, employing either kV X-rays or γ-rays. For MV X-ray and electron beams used in radiotherapy, the DAE film could not achieve the sensitivity to those radiation, while it was found that the liquid DAE could have the sensitivity to the radiation dose.

Academic Significance and Societal Importance of the Research Achievements

医療におけるフィルム線量測定は、放射線治療における2次元線量分布の測定や個人の被ばく線量の管理などに用いられる。広く用いられるラジオクロミックフィルムは、測定結果取得までに時間を要することや、海外製品であるため高価、といった欠点がある。本邦で開発されたX線に高感度のフォトクロミック化合物の色素を用いて、医用放射線の線量測定の可能性を明らかにし、フィルムに加工、即座に放射線量を測定できる安価な国産フィルムを開発する意義は大きい。

Report

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

    (10 results)

All 2021 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (5 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Journal Article] Feasibility study of a photochromic diarylethene film as a clinical dosimeter for kV X-rays2021

    • Author(s)
      Tamura Mikoto、Monzen Hajime、Matsumoto Kenji、Otsuka Masakazu、Nishimura Yasumasa
    • Journal Title

      Radiation Measurements

      Volume: 145 Pages: 106608-106608

    • DOI

      10.1016/j.radmeas.2021.106608

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dosimetric characteristics of a thin bolus made of variable shape tungsten rubber for photon radiotherapy2021

    • Author(s)
      Okuhata Katsuya、Tamura Mikoto、Monzen Hajime、Nishimura Yasumasa
    • Journal Title

      Physical and Engineering Sciences in Medicine

      Volume: 44 Issue: 4 Pages: 1249-1255

    • DOI

      10.1007/s13246-021-01059-2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] First clinical experience of tungsten rubber electron adaptive therapy with real-time variable-shape tungsten rubber2021

    • Author(s)
      Kawai Yoshihiro、Tamura Mikoto、Amano Morikazu、Kosugi Takashi、Monzen Hajime
    • Journal Title

      Anticancer Research

      Volume: 41 Issue: 2 Pages: 919-925

    • DOI

      10.21873/anticanres.14845

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Application of Real-time Variable Shape Tungsten Rubber for Nail Radiation Protection in the Total Skin Electron Beam (TSEB) Therapy2021

    • Author(s)
      Yanagi Yuya、Tamura Mikoto、Monzen Hajime、Matsumoto Kenji、Takei Yoshiki、Noma Kazuo、Kida Tetsuo
    • Journal Title

      Japanese Journal of Radiological Technology

      Volume: 77 Issue: 2 Pages: 145-152

    • DOI

      10.6009/jjrt.2021_JSRT_77.2.145

    • NAID

      130007988389

    • ISSN
      0369-4305, 1881-4883
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Design of commissioning process for Halcyon linac with a new rigid board: A clinical experience2020

    • Author(s)
      Tamura Mikoto、Monzen Hajime、Matsumoto Kenji、Otsuka Masakazu、Nishimura Yasumasa、Okumura Masahiko
    • Journal Title

      Physica Medica

      Volume: 77 Pages: 121-126

    • DOI

      10.1016/j.ejmp.2020.08.004

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Development of a new photochromic diarylethene film for clinical dosimetry.2019

    • Author(s)
      Mikoto Tamura, Hajime Monzen, Kenji Matsumoto, Masakazu Otsuka.
    • Organizer
      The 19th Asia-Oceania Congress of Medical Physics.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Feasibility of a new photochromic diarylethene film for clinical dosimetry in diagnostic area.2019

    • Author(s)
      Mikoto Tamura, Hajime Monzen, Kenji Matsumoto, Masakazu Otsuka.
    • Organizer
      The 7th Annual Congress of Vietnam Association Radiation Technologist.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Radiation shielding efficiency of tungsten rubber in interventional radiology.2019

    • Author(s)
      Kenta Kijima, Anchali Krisanachinda, Petchaleya Suwanpradit, Mikoto Tamura, Yasumasa Nishimura, Hajime Monzen.
    • Organizer
      The 7th Asia Radiation Therapy Symposium.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Evaluation of shielding ability of a novel radiation shielding material, free-form tungsten containing rubber: actual measurement and Monte Carlo simulation.2019

    • Author(s)
      Kazuki Kubo, Masakazu otsuka, Min-Geon Choi, Mikoto Tamura, Kenji Matsumoto, Hajime Monzen.
    • Organizer
      The 19th Asia-Oceania Congress of Medical Physics.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] To compare the radiation shielding ability of tungsten functional paper and Organ-based tube current modulation for the eye lens in head computed tomography: A phantom study.2019

    • Author(s)
      Hiroyuki Kosaka, Shota Hattori, Koji Yamada, Mikoto Tamura, Hajime Monzen.
    • Organizer
      The 19th Asia-Oceania Congress of Medical Physics.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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