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Development of urinary adverse event prediction model in radiotherapy for prostate cancer

Research Project

Project/Area Number 19K08129
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionKeio University

Principal Investigator

OHASHI TOSHIO  慶應義塾大学, 医学部(信濃町), 准教授 (70327641)

Co-Investigator(Kenkyū-buntansha) 深田 恭平  慶應義塾大学, 医学部(信濃町), 助教 (00647266)
田中 智樹  慶應義塾大学, 医学部(信濃町), 助教 (80594598)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords前立腺がん / 放射線治療 / 尿路 / 有害事象 / 前立腺癌
Outline of Research at the Start

前立腺癌の放射線治療において、線量増加による治療効果の上乗せが証明され、高線量時代になった。従来の放射線治療において直腸出血が最も懸念された有害事象であったが、ハイテク機器の普及により低減できるようになった。しかし、尿道線量は前立腺への線量増加ともに増加するため、尿路有害事象の増加が予想される。本研究者は、後ろ向きの臨床試験で定性的ならびに定量的にその事象を確認してきた。本研究では、ファントム測定実験ならびに、いままでに蓄積された臨床データの解析をもとに、統合された予測モデルの構築を目指す。

Outline of Final Research Achievements

In external irradiation, the prostate and rectum are irradiated in multiple fractions, but the position of the prostate and rectum varies slightly with each irradiation, and this slight displacement each time affects the actual dose received by the patient. Especially in external irradiation combined with tissue internal irradiation, the placement of linear gold markers in the connective tissue on both sides of the prostate was effective for optimal image-guided radiation therapy without disturbing the placement of the seed source. It was known that the mechanical isocenters were displaced over time with the use of the linear accelerator, and it was proven that the displacement over time affected dose delivery from the time of commissioning. Regarding the analysis of predictors of adverse urinary tract events using deep learning, it was found that the model could not be constructed and further study is needed.

Academic Significance and Societal Importance of the Research Achievements

本研究では、最適な画像誘導技術により尿道線量を低減させることができることが示された。とくに、組織内照射併用の外部照射では、シード線前立腺両外側の結合織内に線状金マーカーを留置する手法が有効だった。治療後の有害事象を少なくすることにより、個人のQOL向上が期待されるだけでなく、社会全体として医療経済の負担軽減に寄与できる可能性がある。

Report

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

    (14 results)

All 2021 2020 2019

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Retrospective comparison of rectal toxicity between carbon-ion radiotherapy and intensity-modulated radiation therapy based on treatment plan, normal tissue complication probability model, and clinical outcomes in prostate cancer2021

    • Author(s)
      Fukata Kyohei、Kawamura Hidemasa、Kubo Nobuteru、Kanai Tatsuaki、Torikoshi Masami、Nakano Takashi、Tashiro Mutsumi、Ohno Tatsuya
    • Journal Title

      Physica Medica

      Volume: 90 Pages: 6-12

    • DOI

      10.1016/j.ejmp.2021.08.013

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparison of prostate verification with implanted gold markers in tissue surrounding the prostate and pelvic bony anatomy for external beam radiation therapy following low-dose-rate brachytherapy: a prospective clinical trial2020

    • Author(s)
      Kaneda Tomoya、Ohashi Toshio、Hanada Takashi、Takenaka Koji、Nishimura Shuichi、Sakayori Masanori、Sutani Shinya、Momma Tetsuo、Shigematsu Naoyuki
    • Journal Title

      Journal of Radiation Research

      Volume: 61 Issue: 5 Pages: 784-790

    • DOI

      10.1093/jrr/rraa063

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] ”RapidPlan”の臨床活用 ~経験を活かし共有する~2019

    • Author(s)
      大橋俊夫、深田恭平、池島健吾
    • Journal Title

      INNERVISION

      Volume: 34 Pages: 90-91

    • Related Report
      2019 Research-status Report
  • [Journal Article] Genitourinary toxicity after permanent iodine-125 seed implantation: The nationwide Japanese prostate cancer outcome study of permanent iodine-125 seed implantation (J-POPS)2019

    • Author(s)
      Tanaka Nobumichi、Yorozu Atsunori、Kikuchi Takashi、Higashide Satoshi、Kojima Shinsuke、Ohashi Toshio、Katayama Norihisa、Nakamura Katsumasa、Saito Shiro、Dokiya Takushi、Fukushima Masanori
    • Journal Title

      Brachytherapy

      Volume: 18 Issue: 4 Pages: 484-492

    • DOI

      10.1016/j.brachy.2019.03.007

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Mechanical Isocenterの経時変位がVMAT線量Deliveryへ与える影響2021

    • Author(s)
      高橋真一,阿部直也,谷謙甫,脇田明尚,中川悟,酒寄正範,大橋俊夫,金井一能,谷崎洋
    • Organizer
      第34回日本放射線腫瘍学会学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 前立腺癌に対するシード療法の長期成績2021

    • Author(s)
      外山弘文,大橋俊夫,酒寄正範,竹中浩二,箱崎恭平,大門達明,金井邦光,茂松直之
    • Organizer
      第34回日本放射線腫瘍学会学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 埼玉病院における前立腺癌シード療法の長期成績2021

    • Author(s)
      箱﨑恭平,大橋俊夫,門間哲雄,酒寄正範,竹中浩二,外山弘文,金子雄太,大門達明,金井邦光,大家基嗣
    • Organizer
      第109回日本泌尿器科学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Comparison of treatment outcome and adverse event by irradiation method for high-risk prostate cancer2019

    • Author(s)
      Takenaka K, Ohashi T, Nishimura S, Sakayori M, Kaneda T, Momma T, Shigematsu N.
    • Organizer
      The 7th Japan-Taiwan Radiation Oncology Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Is it necessary to inject all 10cc of hydrogel spacer in iodine-125 prostate brachytherapy?2019

    • Author(s)
      Sakayori M, Takenaka K, Ohashi T, Kaneda T, Momma T, Shigematsu N.
    • Organizer
      The 7th Japan-Taiwan Radiation Oncology Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 前立腺癌に対するLDRブラキセラピーの現状と展望2019

    • Author(s)
      大橋俊夫
    • Organizer
      第21回日本放射線腫瘍学会小線源部会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 前立腺癌シード治療においてハイドロゲルスペーサーは10cc全量必要か?2019

    • Author(s)
      酒寄正範,竹中浩二,大橋俊夫,金田朋也,門間哲雄,茂松直之.
    • Organizer
      第21回日本放射線腫瘍学会小線源部会
    • Related Report
      2019 Research-status Report
  • [Presentation] Unfavorable intermediate-riskの前立腺癌における外部照射併用シード治療2019

    • Author(s)
      竹中浩二,大橋俊夫,酒寄正範,金田朋也,西村修一,門間哲雄,茂松直之.
    • Organizer
      第32回日本放射線腫瘍学会学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 正常組織有害事象発生率の推定したパラメータ及び患者データ群に関する頑健性2019

    • Author(s)
      花田剛士,大橋俊夫,竹村亮,深田恭平,石井元樹,長谷川智之,茂松直之.
    • Organizer
      第32回日本放射線腫瘍学会学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] ハイドロゲルスペーサーが前立腺I-125小線源療法の線量パラメータに与える影響2019

    • Author(s)
      田中智樹,澤田将史,白石悠,大橋俊夫,根本貴文,黒岩信子,小坂威雄,水野隆一,小林裕章,宮崎保匡,石田勝,小杉道男,江里口貴久,大家基嗣,茂松直之.
    • Organizer
      第32回日本放射線腫瘍学会学術大会
    • Related Report
      2019 Research-status Report

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

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