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The study for optimum radiation method based on the analyses of the interfractional movement of organs and the impact to proton dose distributions utilizing daily in-room CT images.

Research Project

Project/Area Number 17K09079
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Medical Physics and Radiological Technology
Research Institution福井県立病院(陽子線がん治療センター(陽子線治療研究所))

Principal Investigator

maede yoshikazu  福井県立病院(陽子線がん治療センター(陽子線治療研究所)), 陽子線治療研究所研究部門, 研究員(医学物理士) (70448025)

Co-Investigator(Kenkyū-buntansha) 佐藤 義高  福井県立病院(陽子線がん治療センター(陽子線治療研究所)), 陽子線治療研究所研究部門, 研究員(医師) (10464067)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords陽子線がん治療 / 粒子線がん治療 / 画像誘導放射線治療 / 臓器移動 / インターフラクショナル移動量 / 適合治療 / 陽子線治療 / 前立腺がん治療 / 陽子線適合治療 / 同室CT画像誘導装置 / 医学物理学 / 陽子線治療計画 / 前立腺治療 / インターフラクショナル移動 / 放射線影響 / 深層学習 / 画像誘導法 / 同室CT / 陽子線飛程 / 粒子線治療学 / 適合放射線治療
Outline of Final Research Achievements

In proton therapy, the technique for precise image guidance with optimum radiation methods plays an essential role to take advantage of the physical selectivity called as Bragg peak. We studied the influence of interfractional movement of target tumors as well as critical organs on daily proton doses by utilizing daily CT-images acquired throughout proton therapy with CT-image guidance. Our main results were concerned with the work for prostate cancer treatment, where we analyzed 1500 sets of daily CT images acquired for 40 patients and measured the daily movement of pelvic anatomies. The image guidance by referring the boundary between the prostate and rectum maintained daily dose conditions as the plan however 30% of the total showed the rectal over dose due to the rectal daily deformation. For such patients, the adaptive planning after 10 days can spare the rectal dose during the rest of the treatment and may achieve more secure therapy against rectal complications.

Academic Significance and Societal Importance of the Research Achievements

ブラックピークによってがん部に線量を集中し正常組織の線量の低減を図る陽子治療では、体内のがん部の日々の位置を正確に把握する画像誘導技術と、位置や臓器変化に追随する適合照射法の確立が今後の重要課題である.本研究はCT画像誘導装置による陽子治療で取得した日毎のCT画像を利用して臓器変化による陽子線量分布の影響を評価し、この課題に基礎データを提供する.特に前立腺がん治療において、がん部の前立腺や正常組織の直腸の線量の照射状態を示す定量化方法やその基礎データは、現在建設が進んでいるCT画像誘導装置と適合照射が可能なスキャニング照射法を備えた施設において適合治療を実現するための基礎的な報告となる.

Report

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

    (20 results)

All 2019 2018 2017

All Journal Article (8 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (12 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Journal Article] Effectiveness of re-planning protocols for sparing rectal doses based on the daily CT-images during the proton threatment for prostate cancer2019

    • Author(s)
      Yoshikazu Maeda, Yoshitaka Sato, Hiroyasu Tamamura, Kazutaka Yamamoto, Makoto Sasakai, Nobukazu Fuwa, Shigeyuki Takamatsu, Kyo Kume
    • Journal Title

      Proceedings of The 1st Annual Conference of the particle Therapy Cooperative Group Asia-Oceania (PTCOG-AO2019), December 6-8, 2019, Osaka Japan.

      Volume: 1 Pages: 84-85

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] In-room CT image guided system at proton therapy center , Fukui Prefectural Hospital, and study fir daily anatomical movement and the optimal proton radiation method utilizing daily CT-images2019

    • Author(s)
      Yoshikazu Maeda
    • Journal Title

      Japanese Journal of Medical Physics

      Volume: 39 Pages: 10-10

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Upgraded analyses for the effect of organ motion on proton prostate treatment using full sets of daily CT images2019

    • Author(s)
      Yoshikazu Maeda, Yoshitaka Sato, Satoshi Shibata, Sayuri Bou, Kazutaka Yamamoto, Hiroyasu Tamamura, Makoto Sasaki, Nobukazu Fuwa, Shigeyuki Takamatsu, Kyo kume
    • Journal Title

      Japanese Journal of Medical Physics

      Volume: 39 Pages: 203-203

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Positioning accuracy and daily dose assessment for prostate cancer treatment using in-room CT image guidance at a proton therapy facility2018

    • Author(s)
      Maeda Yoshikazu、Sato Yoshitaka、Minami Hiroki、Yasukawa Yutaka、Yamamoto Kazutaka、Tamamura Hiroyasu、Shibata Satoshi、Bou Sayuri、Sasaki Makoto、Tameshige Yuji、Kume Kyo、Ooto Hiroshi、Kasahara Shigeru、Shimizu Yasuhiro、Saga Yusuke、Omoya Akira、Saitou Makoto
    • Journal Title

      Medical Physics

      Volume: 45 Issue: 5 Pages: 1832-1843

    • DOI

      10.1002/mp.12858

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of organ motion on proton prostate treatments, as determined from analysis of daily CT imaging for patient positioning2018

    • Author(s)
      Maeda Yoshikazu、Sato Yoshitaka、Shibata Satoshi、Bou Sayuri、Yamamoto Kazutaka、Tamamura Hiroyasu、Fuwa Nobukazu、Takamatsu Shigeyuki、Sasaki Makoto、Tameshige Yuji、Kume Kyo、Minami Hiroki、Saga Yusuke、Saito Makoto
    • Journal Title

      Medical Physics

      Volume: 45 Issue: 5 Pages: 1844-1856

    • DOI

      10.1002/mp.12869

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Segmental analysis of respiratory liver motion in patients with and without a history of abdominal surgery2018

    • Author(s)
      Shimizu Yasuhiro、Takamatsu Shigeyuki、Yamamoto Kazutaka、Maeda Yoshikazu、Sasaki Makoto、Tamamura Hiroyasu、Bou Sayuri、Kumano Tomoyasu、Gabata Toshifumi
    • Journal Title

      Japanese Journal of Radiology

      Volume: 36 Issue: 8 Pages: 511-518

    • DOI

      10.1007/s11604-018-0750-3

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interfractional movements of the prostate and seminal vesicles during CT image-guided proton therapy for protstate cancer and their impact on the proton range for lateral beam configurations2018

    • Author(s)
      Yoshikazu Maeda, Yoshitaka Sato, Satoshi Shibata, Sayuri Bou, Kazutaka Yamamoto, Hiroyasu Tamamura, Nobukazu Fuwa, Shigeyuki Takamatsu, Makoto Sasaki, Kyo Kume
    • Journal Title

      Japanese Journal of Medical Physics

      Volume: 38 Pages: 65-65

    • Related Report
      2018 Research-status Report
  • [Journal Article] The positioning precision of In-room CT image-guided system in proton therapy facility and the first application to prostate cancer treatment2017

    • Author(s)
      Yoshikazu Maeda, Yoshitaka Sato, Hiroki Minami, Yutaka Yasukawa, Satoshi Shibata, Kazutaka Yamamoto, Hiroyasu Tamamura, Makoto Sasaki, Yuji Tameshige
    • Journal Title

      Japanese Journal of Medical Physics

      Volume: 37 Pages: 114-114

    • Related Report
      2017 Research-status Report
  • [Presentation] Effectiveness of re-planning protocols for sparing rectal doses based on the daily CT-images during the proton threatment for prostate cancer2019

    • Author(s)
      Yoshikazu Maeda
    • Organizer
      The 1st Annual Conference of the particle Therapy Cooperative Group Asia-Oceania (PTCOG-AO2019), Osaka Japan.
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Assessment of Changes of the Distance from Liver Surface to Isocenter during Proton Beam Treatment for Liver Cancer.2019

    • Author(s)
      Satoshi Shibata
    • Organizer
      American Society for Radiation Oncology (ASTRO19)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 陽子線前立腺がん治療における直腸線量低減のための同室CT画像を利用した再治療計画の有用性2019

    • Author(s)
      前田 嘉一
    • Organizer
      第16回日本粒子線治療臨床研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] In-room CT image guided system at proton therapy center , Fukui Prefectural Hospital, and study fir daily anatomical movement and the optimal proton radiation method utilizing daily CT-images2019

    • Author(s)
      前田 嘉一
    • Organizer
      第118回日本医学物理学会学術大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Upgraded analyses for the effect of organ motion on proton prostate treatment using full sets of daily CT images2019

    • Author(s)
      Yoshikazu Maeda
    • Organizer
      the particle Therapy Cooperative Group (PTCOG58), Manchester UK.
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Upgraded analyses for the effect of organ motion on proton prostate treatment using full sets of daily CT images2019

    • Author(s)
      前田 嘉一
    • Organizer
      第117回日本医学物理学会学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Interfractional movements of the prostate and seminal vesicles during CT image-guided proton therapy for prostate cancer and their impact on the proton range for lateral beam configurations2018

    • Author(s)
      前田 嘉一
    • Organizer
      第115回日本医学物理学会学術大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Interfractional variations of prostate and seminal vesicle for the In-room CT-image guided proton therapy with lateral beams for prostate cancer2017

    • Author(s)
      Yoshikazu Maeda
    • Organizer
      International conference of Particle Therapy Co-Operative Group
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 前立腺がん陽子線治療における同室CT装置画像を利用した骨盤内臓器の移動解析と対向陽子線飛程の変化解析2017

    • Author(s)
      前田 嘉一
    • Organizer
      第14回日本粒子線臨床治療研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] In-room CT image guided proton therapy for prostate and liver cancer2017

    • Author(s)
      Yoshikazu Maeda
    • Organizer
      The First Hefei International Forum for Proton and Heavy Ion Radiotherapy The Hefei International Forum for Radiological Medical Physicsin Chaina
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 肝腫瘍に対するCT位置決めによる陽子線治療の初期経験2017

    • Author(s)
      Yoshitaka Sato
    • Organizer
      第30回日本放射線腫瘍学会
    • Related Report
      2017 Research-status Report
  • [Presentation] The positioning precision of In-room CT image-guided system in proton therapy facility and the first application to prostate cancer treatment2017

    • Author(s)
      前田 嘉一
    • Organizer
      第113回日本医学物理学会学術大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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