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Clinical and physical considerations in translational studies of intensity modulated radiation therapy

Research Project

Project/Area Number 18K15572
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionNational Cancer Center Japan

Principal Investigator

Motegi Kana  国立研究開発法人国立がん研究センター, 東病院, 医学物理士 (40740436)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Keywords頭頸部癌 / 強度変調放射線治療 / 治療計画 / 放射線治療 / 放射線治療計画 / 堅牢性 / セットアップエラー / 頭頸部 / ロバスト治療計画 / DIR / 医学物理 / 放射線治療技術 / 最適化計算
Outline of Final Research Achievements

In this study, a clinical evaluation was performed to introduce a robust treatment planning method for intensity modulated radiation therapy for head and neck cancer to prevent unnecessary irradiation of surrounding normal tissues while maintaining the prescribed dose to the clinical target volume even when patient positional uncertainty occurs. The dose distribution obtained using the robust treatment planning method was as robust as that obtained using conventional treatment planning method using the planned target volume against changes in the non-rigid deformation of body external and patient positional uncertainty during the treatment period. The dose to the parotid gland, a normal tissue that affects the patient's quality of life, can be reduced by a few Gy.

Academic Significance and Societal Importance of the Research Achievements

治療計画の堅牢性の評価では、並進方向に故意に位置不確かさを発生させ、評価することが多いが、患者の位置不確かさには体内外の変形や回転も含まれる。本研究では、実治療に即した評価を行うべく、治療時の患者の様子を最も表しているCBCT画像からロバスト治療計画法の堅牢性を評価した。この点が他の研究と差別化でき、学術的意義となる。本研究の成果は、ロバスト治療計画を臨床に導入するための確かなエビデンスに直結するため、臨床での有用性が非常に高く、ロバスト治療計画法の臨床での早い実現が望まれる。

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

    (10 results)

All 2021 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Usefulness of hybrid deformable image registration algorithms in prostate radiation therapy2018

    • Author(s)
      Motegi Kana、Tachibana Hidenobu、Motegi Atsushi、Hotta Kenji、Baba Hiromi、Akimoto Tetsuo
    • Journal Title

      Journal of Applied Clinical Medical Physics

      Volume: 20 Issue: 1 Pages: 229-236

    • DOI

      10.1002/acm2.12515

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impact of shoulder deformation on volumetric modulated arc therapy doses for head and neck cancer2018

    • Author(s)
      Tachibana Hidenobu、Motegi Kana、Moriya Shunsuke
    • Journal Title

      Physica Medica

      Volume: 53 Pages: 118-128

    • DOI

      10.1016/j.ejmp.2018.08.015

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] シンポジウム2「放射線治療における不確かさの評価:外部放射線治療に関連した不確かさの推定」3. 相対線量計測の不確かさ2021

    • Author(s)
      茂木佳菜
    • Organizer
      第76回日本放射線技術学会総会学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Development of QA programs for the Halcyon linac. AAPM 2020 annual meeting.2020

    • Author(s)
      K. Motegi, H. Tachibana, K Hotta, H Baba, Ryo Takahashi, Tetsuo Akimoto.
    • Organizer
      The American Association of Physicists in Medicine, 2020 annual meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Halcyon線形加速器に対する治療計画装置のコミッショニング2019

    • Author(s)
      茂木佳菜, 大吉一, 鹿野和仁, 守屋 駿佑, 橘英伸, 秋元哲夫
    • Organizer
      日本放射線腫瘍学会第32回学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Halcyon線形加速器に対するQAプログラムの構築2019

    • Author(s)
      茂木佳菜, 大吉一, 鹿野和仁, 守屋 駿佑, 橘英伸, 秋元哲夫
    • Organizer
      日本放射線腫瘍学会第32回学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Halcyonにおけるクラークソンベースの独立計算検証ソフトウェアの精度検証2019

    • Author(s)
      守屋駿佑, 茂木佳菜, 大吉一, 宮川真, 黒澤知征, 髙橋良, 橘英伸
    • Organizer
      日本放射線腫瘍学会第32回学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 前立腺の位置変動や変形に対するハイブリッドDIRの有用性の検討2019

    • Author(s)
      茂木 佳菜, 橘 英伸, 茂木 厚, 堀田 健二, 馬場 大海, 高橋 良, 秋元 哲夫
    • Organizer
      第32回高精度放射線外部照射部会学術大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Impact of different treatment planning systems on modulation complexity for prostate volumetric modulated arc therapy2018

    • Author(s)
      Masanobu Itano, Kana Motegi, Satoshi Kanai, Sho Shirasaki and Hidenobu Tachibana
    • Organizer
      American Association of Physicists in Medicine Annual Meeting
    • Related Report
      2018 Research-status Report
  • [Presentation] 前立腺VMATプランの治療計画装置間のプランの複雑性の違いの検討2018

    • Author(s)
      板野正信, 茂木佳菜, 金井悟史,  白﨑翔, 橘英伸
    • Organizer
      第31回日本放射線腫瘍学会
    • Related Report
      2018 Research-status Report

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

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