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Remote production of metallic radionuclides for internal radiotherapy

Research Project

Project/Area Number 17K10384
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Radiation science
Research InstitutionNational Institutes for Quantum and Radiological Science and Technology

Principal Investigator

Nagatsu Kotaro  国立研究開発法人量子科学技術研究開発機構, 放射線医学総合研究所 先進核医学基盤研究部, 研究統括(定常) (30531529)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords核医学治療 / アルファ線標的アイソトープ治療 / アクチニウム225 / ラジウム226 / ターゲット / 核反応 / 放射性医薬品 / 放射線治療薬 / 放射性治療薬 / Ac-225 / Ra-226 / 内照射療法 / 金属RI / アルファ線放出核種
Outline of Final Research Achievements

A feasibility study on the production of Ac-225 from a Ra-226 target was performed. In this study, two methods for the target preparation, i.e., (1) sedimentation of RaCO3 with carrier, and (2) electro-deposition of Ra onto the surface of target chamber, were developed. Both methods showed successful results in activation of Ra target; the later method, which can solidify the Ra at the limited area of beam-striking spot, seems to be favorable for assembling a remote system, in particular. For example, decay corrected activity of 12μCi of Ac-225 was obtained by activation of 400μg (μCi) of Ra-226 by 18 MeV protons at 20μA for 3 h.

Academic Significance and Societal Importance of the Research Achievements

Ac-225は放射線治療薬として高い治療効果を望むことが可能なアルファ線源として世界的に注目され,利用要望が高まっている。一方で,その供給体制は現在,Th-229の減衰による天然製法に限られており,需要が供給を上回っている。本研究では加速器を利用して,人工的にAc-225を製造する手法を開発したことから,今後のAc-225供給,及び関連するアルファ線源標識放射線治療薬の開発を加速させる期待が持たれる。
また,本研究で原料として利用したRa-226はいわゆる長寿命廃棄線源に該当し,産業的・社会的な利用方法が無かった。本研究成果を通じて,当該廃棄線源を社会的に有用な形で還元出来るものと考えている。

Report

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

    (13 results)

All 2019 2018 Other

All Presentation (10 results) (of which Int'l Joint Research: 2 results,  Invited: 6 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results)

  • [Presentation] 医用RIの国際的動向並びに量研機構での放射性薬剤開発について2019

    • Author(s)
      永津弘太郎
    • Organizer
      原子力委員会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 医療用RIの国際的動向並びに量研機構での放射性薬剤開発について2019

    • Author(s)
      永津弘太郎
    • Organizer
      日本アイソトープ協会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 核種製造マニアの研究者とながめる元素周期表2019

    • Author(s)
      永津弘太郎
    • Organizer
      千葉市科学フェスタ2019 大人が楽しむ科学教室
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Development of the production methods for emerging radionuclides applicable to the theranostical basic research2019

    • Author(s)
      Kotaro NAGATSU, Yasuhisa FUJIBAYASHI, Ming-Rong ZHANG, Tomoyuki OHYA
    • Organizer
      Research Coordination Meeting, International Atomic Energy Agency
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A production challenge of Ac-225 from 226RaCO3 target activated by vertical beam2019

    • Author(s)
      Nagatsu K, Suzuki H, Matsumoto M, Fukada M, Minegishi K, Tsuji A, Higashi T, Zhang MR
    • Organizer
      The 11th International Symposium on Targeted Alpha Therapy
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Practical challenges of Therapeutic radionuclides production for the TRT studies2019

    • Author(s)
      Nagatsu K
    • Organizer
      The 117th Scientific Meeting on the Japan Society of Medical Physics
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Roles of Reactor and Accelerator for Medical radioisotope production2019

    • Author(s)
      Nagatsu K
    • Organizer
      French Embassy, Tokyo
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Feasibility study for the production of Ac-225 from Ra-226 target2018

    • Author(s)
      Nagatsu K, Suzuki H, Tsuji A, Minegishi K, Matsumoto M, Ishizu H, Shiina T, Arai K, Akabori S, Higashi T, Zhang MR
    • Organizer
      The 58th Annual Meeting of the Japanese Society of Nuclear Medicine
    • Related Report
      2018 Research-status Report
  • [Presentation] Ac-225 production status and future in Japan2018

    • Author(s)
      Nagatsu K
    • Organizer
      The 57th Annual Meeting of Korean Society of Nuclear Medicine
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] A feasibility study on Ac-225 production and Current state of the Targeted alpha-therapy in Japan2018

    • Author(s)
      Nagatsu K
    • Organizer
      Korean Institute of Radiological and Medical Sciences
    • Related Report
      2018 Research-status Report
    • Invited
  • [Remarks] QSTニュースレター

    • URL

      https://www.qst.go.jp/uploaded/attachment/16444.pdf

    • Related Report
      2019 Annual Research Report
  • [Remarks] 技術と経験を駆使して、新たな放射性核種(RI)を作り出す

    • URL

      https://www.qst.go.jp/site/qms/39117.html

    • Related Report
      2019 Annual Research Report
  • [Patent(Industrial Property Rights)] 放射性核種を遠隔自動的に製造する方法およびターゲット容器2018

    • Inventor(s)
      永津弘太郎,鈴木寿,石津秀武,松本幹雄
    • Industrial Property Rights Holder
      国立研究開発法人量子科学技術研究開発機構
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2018-060672
    • Filing Date
      2018
    • Related Report
      2017 Research-status Report

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

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