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Selective Internal Radiotherapy by Secondary Electrons Emitted from Non-Radioactive Drugs Taken by Cancer Cells

Research Project

Project/Area Number 25282152
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Medical systems
Research InstitutionTokyo Institute of Technology

Principal Investigator

Oguri Yoshiyuki  東京工業大学, 科学技術創成研究院, 教授 (90160829)

Co-Investigator(Kenkyū-buntansha) 長谷川 純  東京工業大学, 科学技術創成研究院, 准教授 (90302984)
近藤 康太郎  東京工業大学, 原子炉工学研究所, 助教 (80582593)
Research Collaborator Fukuda Hitoshi  
Project Period (FY) 2013-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2016: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords低侵襲ガン治療 / 吸収線量 / 放射線増感剤 / オージェ電子 / X線吸収端 / 単色X線 / 荷電粒子励起X線放出 / 静電加速器 / 深部ガン治療 / 抗ガン剤 / ナノ粒子増感剤 / ポリマーゲル線量計 / 陽子線 / 特性X線 / 二次電子 / 液体シンチレーター / 電子増倍型CCDカメラ / イメージングプレート / 癌 / 放射線 / X線 / 量子ビーム / 加速器 / 浸潤性ガン治療 / ナノ粒子 / モンテカルロシミュレーション / 陽子線励起準単色X線 / 注射針 / 金ナノ粒子 / K吸収端 / 陽子線励起特性X線 / 金属微粒子 / 半導体X線検出器 / 液体シンチレータ
Outline of Final Research Achievements

In cancer radiotherapy, generally, patients usually suffer from radiation hazard as a side effect, since not only cancer cells but also normal cells are irradiated. However, if a cancer cell is loaded with a nonradioactive drug containing heavy atoms, and then irradiated with monochromatic X-rays of an appropriate energy, many secondary electrons are emitted from the heavy atoms. Thus, only the cancer cell can be internally irradiated. To examine the feasibility of this method, we irradiated a thin metal foil simulating these heavy atoms with proton-induced monochromatic X-rays, and measured the dose distribution around the foil. As a result, we found that the dose was greatly increased around the foil. Therefore, a similar dose increase due to secondary electrons can be expected around heavy atoms ingested by cancer cells, indicating the possibility of applying this method to minimally invasive cancer treatment.

Academic Significance and Societal Importance of the Research Achievements

工学的には原子核反応に比べてはるかに容易に実現できる原子過程を利用してホウ素中性子捕捉療法(BNCT)と同様な効果を実現する点に意義がある.また通常の医療用連続X線に代え,陽子線励起単色X線によりガン細胞が取り込んだ目的の原子のみを電離し,正常組織への影響を抑える点がポイントである.原理的に重粒子線治療やBNCT等と比較して低コストであり,開発が進めば広く普及する可能性がある.高浸潤性ガンの治療という極めて要請の強い技術分野であり,社会的意義は大きい.また加速器技術に関係しており,医療機器産業のみならず電気電子,重電,原子力等の分野の需要を刺激し,新たな産業分野を生む可能性も期待できる.

Report

(7 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • Research Products

    (11 results)

All 2017 2016 2015 2014 2013 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Acknowledgement Compliant: 3 results) Presentation (5 results) Remarks (2 results)

  • [Journal Article] Evaluation of the X-ray distribution of a syringe-needle type proton-induced X-ray source by Geant4 simulation2017

    • Author(s)
      Hu Y.、Fukuda H.、Oguri Y.
    • Journal Title

      X-Ray Spectrometry

      Volume: 46 Issue: 5 Pages: 356-360

    • DOI

      10.1002/xrs.2785

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct observation of dose distribution around a syringe-needle type proton-induced X-ray source using liquid scintillator and a CCD camera2016

    • Author(s)
      Y. Hu, K. Kondo, Y. Mizushiro, Y. Oguri and H. Fukuda
    • Journal Title

      International Journal of PIXE

      Volume: 26 Issue: 01n02 Pages: 53-60

    • DOI

      10.1142/s0129083516500066

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Selective internal radiotherapy using proton-induced monochromatic X-rays and cancer-targeting nanoparticle sensitizers2015

    • Author(s)
      Y. Oguri, Y. Hu, K. Ploykrachang, Y. Mizushiro, K. Kondo and H. Fukuda
    • Journal Title

      International Journal of PIXE

      Volume: 25 Pages: 101-111

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Selective Internal Radiotherapy Using Proton-Induced Monochromatic X-Rays and Cancer-Targeting Nanoparticle Sensitizers2015

    • Author(s)
      Y. Oguri, Y. Hu, K. Ploykrachang, Y. Mizushiro K. Kondo and H. Fukuda
    • Journal Title

      International Journal of PIXE

      Volume: 未定

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 一次陽子線エミッタンス測定とGeant4シミュレーションによる注射針型陽子線励起X線源の強度の定量的評価2016

    • Author(s)
      胡 宇超,近藤康太郎,福田一志,小栗慶之
    • Organizer
      日本原子力学会2016年春の年会
    • Place of Presentation
      東北大学川内キャンパス
    • Year and Date
      2016-03-26
    • Related Report
      2015 Annual Research Report
  • [Presentation] 陽子線励起単色X線とナノ粒子増感材を用いた浸潤性ガン治療法の可能性2014

    • Author(s)
      小栗慶之,胡 宇超,水城 優,Kamontip Ploykrachang,近藤康太郎,福田一志
    • Organizer
      第30回PIXEシンポジウム
    • Place of Presentation
      岩手医科大学附属循環器医療センター
    • Year and Date
      2014-10-22 – 2014-10-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] 注射針型陽子線励起単色X線源と増感材ナノ粒子を用いた低侵襲深部ガン治療の可能性2014

    • Author(s)
      小栗慶之,近藤康太郎,胡 宇超,福田一志,長谷川 純
    • Organizer
      日本原子力学会2014年秋の大会
    • Place of Presentation
      京都大学吉田キャンパス
    • Year and Date
      2014-09-08 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] 前立腺がん治療用注射針型陽子線励起X線源におけるX線発生用金属標的の最適化設計2014

    • Author(s)
      胡 宇超,近藤康太郎,福田一志,K. Ploykrachang,小栗慶之
    • Organizer
      日本原子力学会2014年秋の大会
    • Place of Presentation
      京都大学吉田キャンパス
    • Year and Date
      2014-09-08 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] Proton-Induced Characteristic X-ray Source for Deep-Seated Cancer Treatment Using a Syringe Needle2013

    • Author(s)
      Y. Oguri, Y. Hu, K. Kondo and J. Hasegawa
    • Organizer
      The 11th European Conference on Accelerators in Applied Research and Technology
    • Place of Presentation
      University of Namur, Namur, Belgium
    • Related Report
      2013 Annual Research Report
  • [Remarks] X線吸収端を用いた被ばく線量の少ないX線診断・治療技術の基礎研究

    • URL

      http://www.nr.titech.ac.jp/~yoguri/research/research.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 小栗研究室 ― 研究室紹介 #38 ―

    • URL

      https://educ.titech.ac.jp/ee/news/2016_10/052795.html

    • Related Report
      2017 Annual Research Report

URL: 

Published: 2013-05-21   Modified: 2020-03-30  

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