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Gel dosimetry in ion beam with CCD type optical computed tomography system

Research Project

Project/Area Number 16K21257
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Radiation science
Medical Physics and Radiological Technology
Research InstitutionGunma Prefectural College of Health Sciences (2018-2019)
Ibaraki Prefectural University of Health Science (2016-2017)

Principal Investigator

KAWAMURA HIRAKU  群馬県立県民健康科学大学, 診療放射線学部, 助教 (80424050)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords光CT / ポリマーゲル線量計 / 粒子線治療 / 画像再構成 / CCDタイプ光CT / 屈折率変化 / 光断層装置 / 2次元画像 / 光学CT測定 / 粒子線測定 / ゲル線量計
Outline of Final Research Achievements

The advantages of gel dosimeter, as polymer gel and fricke gel and dye gel are a human tissue equivalent and a possibility of three-dimensional dosimetry. The dose evaluation method of polymer gel dosimeter has been used by measuring spin-spin relaxation rate, called R2 method using clinical MRI until now. Although the R2 method has high accuracy,it is difficult to obtain the images of thin slice thickness, and it is needed to scan that it takes a long time for accuracy images.
In this study, new method for evaluation of gel dosimeters using constructed optical computed tomography system composed of charge coupled device, CCD, was proposed. We tried to measure carbon dose using polymer gel dosimeter. The dosimetric results of cross-sectional reconstructed image was employed to besed the transmitted light amount of the gel dosimeter.

Academic Significance and Societal Importance of the Research Achievements

現在の放射線治療装置はコンピューター制御され、正確に標的に照射される。また治療計画の計算は複雑となるが、標的に対する線量検証は必要な手順であり、最終的に人間による管理や確認が必要不可欠である。
ゲル線量計の臨床応用が可能となれば、現在用いられている電離箱線量計やフィルムなどの検証ツールと併用・使用の選択肢が増えると予想される。つまり目的に合わせて最適な線量計・検出器を選択することができるようになると考えられる。
ゲル線量計の臨床応用には新しいゲル線量計評価手法が必要とされており、本研究を発展・応用させることにより、将来的に放射線治療技術への貢献が可能となる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2019 2018 2017 2016

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

  • [Journal Article] Investigation of Temperature Dependence of Polymer Gels for Use with Scanning Magnetic Resonance Imaging.2018

    • Author(s)
      H Kawamura, K Shinoda, H Fuse, T Takanashi, Y Shimada, Y Ishimori, M Monma, K Miyamoto, H Sato, T Fujisaki, T Sakae, A Matsumura
    • Journal Title

      International Journal of Medical Physics, Clinical Engineering and Radiation Oncology

      Volume: 7 Issue: 02 Pages: 261-272

    • DOI

      10.4236/ijmpcero.2018.72022

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Influence of magnesium chloride on the dose-response of polyacrylamide-type gel dosimeters2018

    • Author(s)
      Shin-ichiro Hayashi, Hiraku Kawamura, Shuji Usui, Takahiro Tominaga
    • Journal Title

      Radiological Physics and Technology

      Volume: 11 Issue: 4 Pages: 375-381

    • DOI

      10.1007/s12194-018-0473-2

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluation of Spatial Resolution of MRI, Optical CT and X-Ray CT Using MTF for Gel Dosimeter2018

    • Author(s)
      Takanashi Takaoki、Kawamura Hiraku
    • Journal Title

      IFMBE Proceedings book series: World Congress on Medical Physics and Biomedical Engineering 2018

      Volume: 68/1 Pages: 35-38

    • DOI

      10.1007/978-981-10-9035-6_6

    • ISBN
      9789811090349, 9789811090356
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A comparison of the dose?response behavior of AQUAJOINT-based polymer gel and PAGAT gel dosimeters measured using Optical CT and MRI2017

    • Author(s)
      Takanashi Takaoki、Kawamura Hiraku、Fukasaku Kazuaki、Antonio Sahade Daniel、Hamada Toshimasa
    • Journal Title

      Journal of Medical Physics: Conference Series

      Volume: 847 Pages: 012013-012013

    • DOI

      10.1088/1742-6596/847/1/012013

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Optical Computed Tomography for Polymer Gel Dosimetry2017

    • Author(s)
      川村 拓、高梨 宇宙、嶋田 芳和、佐藤 裕一、阿部 慎司、原 敏
    • Journal Title

      Japanese Journal of Medical Physics (Igakubutsuri)

      Volume: 37 Issue: 2 Pages: 111-116

    • DOI

      10.11323/jjmp.37.2_111

    • NAID

      130006943053

    • ISSN
      1345-5354, 2186-9634
    • Related Report
      2017 Research-status Report
    • Open Access / Int'l Joint Research
  • [Presentation] Optical evaluation about polymer gel dosimeter in carbon ion beams.2019

    • Author(s)
      Hiraku Kawamura,Takaoki Takanashi, Hiroshi Yoshii, Toshimasa Hamada, Tsugufumi Matsuyama, Yoshie Izumoto, Hitoshi Sato
    • Organizer
      19th International Conference on Solid State Dosimetry
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 定位放射線治療における線量分布評価2019

    • Author(s)
      新木佳友、川村拓、佐藤裕一
    • Organizer
      第8回 3Dゲル線量計研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] レーザー-フォトダイオード型および面光源-カメラ型光学CT の構築2018

    • Author(s)
      川村拓、高梨宇宙
    • Organizer
      第7回 3次元(3D)ゲル線量計研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] The investigation of the polymer gel dosimetry in patch-field proton therapy using beam current modulation2018

    • Author(s)
      M Ishida, H Kawamura, M Sato, H Takei, T Sakae
    • Organizer
      18th Asia-Oceania Congress on Medical Physics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] INVESTIGATION OF RECONSTRUCTED FILTERS OF OPTICAL COMPUTED TOMOGRAPHY FOR POLYMER GEL DOSIMETER.2017

    • Author(s)
      Kawamura H, Takanashi T, Shimada Y, Sato Y, Abe S.
    • Organizer
      17th Asia Oceania Congress of Medical Physics & 38th Annual Conference of Association of Medical Physicists of India
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Construction and measurement of optical CT system for evaluation of polymer gel dosimeters2016

    • Author(s)
      H. Kawamura, T. Takanashi, Y. Shimada, Y. Sato, S. Abe
    • Organizer
      22ND International Conference on Medical Physics 2016
    • Place of Presentation
      Bangkok, Thailand
    • Year and Date
      2016-12-09
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] A comparison of the dose-response behavior of AQUAJOINT and PAGAT polymer gel dosimeters measured by Optical CT and MRI2016

    • Author(s)
      Takaoki Takanashi, Hiraku Kawamura, Kazuaki Fukasaku, Daniel Antonio Sahade and Toshimasa Hamada
    • Organizer
      9th International Conference on 3D Radiation Dosimetry (IC3DDose)
    • Place of Presentation
      Texas, USA
    • Year and Date
      2016-11-07
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2021-02-19  

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