• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Impact of dose uncertainty of tracking irradiation in three-dimensional measurements using a polymer-gel dosimetry with deep learning

Research Project

Project/Area Number 20K08097
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 InstitutionNational Cancer Center Japan

Principal Investigator

Hidenobu Tachibana  国立研究開発法人国立がん研究センター, 東病院, 室長 (20450215)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywordsゲル線量計 / 深層学習 / 放射線治療 / MR / 雑音除去 / 高速撮影 / 三次元線量分布
Outline of Research at the Start

呼吸性移動を伴う腫瘍への高精度放射線治療においてその治療の複雑性により投与線量の不確かさを増大させる。これを解決するため、本研究では実際の臨床および研究でゲル線量計を「三次元測定器」として利用することを実現することを目的とし、深層学習を応用して短時間撮像で低解像度およびノイズが多いMR画像からでも長時間で撮影したMR画像と同レベルの画像を生成する技術を開発・実装する。そして、本研究で開発した方法とゲル線量計で得た実測での三次元線量分布データを、生物モデルに考慮させ実際の治療への影響(腫瘍制御率、副作用発生率)を明らかにする。

Outline of Final Research Achievements

The principles and implementation of deep learning for high resolution and noise reduction (DL-HRNR) have been completed, but it has been discovered that obtaining high-quality data is difficult and challenging. In the future, it is believed that obtaining training data for DL-HRNR can be achieved through high-speed sequences and low-noise sequences in MR imaging. Additionally, conducting MR imaging of gel dosimeters with various dose distribution patterns will be necessary to obtain a larger amount of training data.

Academic Significance and Societal Importance of the Research Achievements

深層学習が全てを解決できるわけではなく、よい教師データが必要であり、本研究におけるゲル線量計の教師データ取得が難しいことがわかった。
MRによるゲル線量計の画像化は歴史が古く、実績が多いため、デファクトスタンタードであり、信頼性も高いが、利便性の観点からすると、別のモダリティへのシフトが必要であると言える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2023 2022

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Verification of dose distribution in high dose-rate brachytherapy for cervical cancer using a normoxic <i>N</i>-vinylpyrrolidone polymer gel dosimeter2022

    • Author(s)
      Watanabe Yusuke、Maeyama Takuya、Mizukami Shinya、Tachibana Hidenobu、Terazaki Tsuyoshi、Takei Hideyuki、Muraishi Hiroshi、Gomi Tsutomu、Hayashi Shin-ichiro
    • Journal Title

      Journal of Radiation Research

      Volume: 63 Issue: 6 Pages: 838-848

    • DOI

      10.1093/jrr/rrac053

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Practical dosimetry procedure of air kerma for kilovoltage X-ray imaging in radiation oncology using a 0.6-cc cylindrical ionization chamber with a cobalt absorbed dose-to-water calibration coefficient2022

    • Author(s)
      Tachibana Hidenobu、Takahashi Ryo、Kogure Takayuki、Nishiyama Shiro、Kurosawa Tomoyuki
    • Journal Title

      Radiological Physics and Technology

      Volume: 15 Issue: 3 Pages: 264-270

    • DOI

      10.1007/s12194-022-00665-3

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Detection of anatomical changes using two‐dimensional x‐ray images for head and neck adaptive radiotherapy2022

    • Author(s)
      Hirotaki Kouta、Moriya Shunsuke、Tachibana Hidenobu、Sakae Takeji
    • Journal Title

      Medical Physics

      Volume: 49 Issue: 5 Pages: 3288-3297

    • DOI

      10.1002/mp.15587

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Multi-Institutional Study of End-to-End Dose Delivery Quality Assurance Testing for Image-Guided Brachytherapy Using a Gel Dosimeter2022

    • Author(s)
      Tachibana H, Watanabe Y, Kurokawa S, Maeyama T, Hiroki T, Ikoma H,… Akimoto T
    • Journal Title

      Brachytherapy

      Volume: 21 Issue: 6 Pages: 956

    • DOI

      10.1016/j.brachy.2022.06.006

    • URL

      https://pure.teikyo.jp/en/publications/23982351-ff9c-446a-80de-88d614950828

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 画像誘導高線量率密封小線源治療の郵送調査2023

    • Author(s)
      橘英伸
    • Organizer
      日本医学物理学会ウィンターセミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] ポリマーゲル線量計とkV-CBCTを利用した三次元的な治療系および画像系アイソセンタの精度検証用プログラムの開発2023

    • Author(s)
      大鹿 理貴
    • Organizer
      第36回高精度外部照射研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Dose uncertainties of polymer gel dosimeter may not be influenced by temperature variation during transportation.2022

    • Author(s)
      Shogo Kurokawa
    • Organizer
      AAPM 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 三次元ゲル線量計を利用した画像誘導高線量率密封小線源治療の郵送調査の有効性2022

    • Author(s)
      橘英伸
    • Organizer
      小線源治療部会第24回学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ゲル線量計の幾何学的測定可能領域の改善2022

    • Author(s)
      橘英伸
    • Organizer
      日本放射線腫瘍学会第35回学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ポリマーゲル線量計における線量率依存性による線量分布検証への影響2022

    • Author(s)
      黒川 聖悟
    • Organizer
      日本放射線腫瘍学会第35回学術大会
    • Related Report
      2022 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi