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The separation study of the radioisotopes in group 11 for radiotherapy

Research Project

Project/Area Number 17K10386
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 Science and Technology

Principal Investigator

Ohya Tomoyuki  国立研究開発法人量子科学技術研究開発機構, 量子医科学研究所 先進核医学基盤研究部, 研究員 (80531532)

Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords内照射療法 / 67Cu / グリーンケミカル / 共沈法 / 111Ag / イオン交換樹脂 / ターゲットリサイクル / 核種製造 / グリーンケミストリー / Cu-67 / Ag-111 / 銀核種 / 内照射療法核種 / 分離精製法 / radiotherapy / bulk zinc target / co-precipitation / palladium target / silver radionuclides / separation / 共沈分離法 / パラジウムターゲット / 励起関数 / 共沈分離
Outline of Final Research Achievements

Copper-67 (T1/2 = 61.9 h, β-) is a most feasible radionuclide for radiotherapy. However, the routes for large scale production use a bulk zinc as a target, and as a result, the separation process of 67Cu from a zinc target become troublesome. In this study, we developed the separation method of 67Cu using double co-precipitation with silver nitrate. The quality and the yield of the 67Cu product by the new method were equal to that by the conventional method, though the total operation time was drastically reduced from a whole day to 3 hours. Moreover, the production route of silver-111(T1/2 = 7.45 d, β-), which is a candidate of alternative radionuclide of 67Cu, was also studied. The separation using anion-exchange resin was successful with high yield (98%), radio-rhodium, silver and palladium was eluted in turn with the increase of the concentration of hydrochronic acid in the eluate. In addition, the most of the target was recycled (96%).

Academic Significance and Societal Importance of the Research Achievements

67Cuは治療に特化した核種として古くから注目されてきた。しかし、製造過程で大量の亜鉛を使用するため、そこからの67Cuの分離精製は多量の無機酸やイオン交換樹脂を必要とし、操作も終日を要する煩雑なものであった。しかし、本研究で開発した方法では、イオン交換樹脂を用いないため、無機酸の使用量を大幅削減や、作業時間の短縮にもつながった。これは近年、グリーンケミカルとして重要視され始めた環境負荷が低い手法でもある。また、同時に注目した111Agに関して開発した分離精製法は、ターゲットのリサイクルを含め、原子炉を用いた大量製造(110Pdを使用)にも適用できる手法であり、その応用範囲は広い。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 2017

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Separation of radiosilver from a cyclotron-irradiated palladium target2020

    • Author(s)
      Tomoyuki Ohya, Kotaro Nagatsu, Masayuki Hanyu, Katsuyuki Minegishi, Ming-Rong Zhang
    • Journal Title

      Radiochimica Acta

      Volume: - Issue: 8 Pages: 641-648

    • DOI

      10.1515/ract-2019-3211

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Simple separation of 67Cu from bulk zinc by coprecipitation using hydrogen sulfide gas and silver nitrate2020

    • Author(s)
      Tomoyuki Ohya, Kotaro Nagatsu, Masayuki Hanyu, Katsuyuki Minegishi, Ming-Rong Zhang
    • Journal Title

      Radiochimica Acta

      Volume: - Issue: 6 Pages: 469-476

    • DOI

      10.1515/ract-2019-3168

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Development of a remote purification apparatus with disposable evaporator for the routine production of high-quality 64Cu for clinical use2019

    • Author(s)
      Ohya Tomoyuki、Minegishi Katsuyuki、Suzuki Hisashi、Nagatsu Kotaro、Fukada Masami、Hanyu Masayuki、Zhang Ming-Rong
    • Journal Title

      Applied Radiation and Isotopes

      Volume: 146 Pages: 127-132

    • DOI

      10.1016/j.apradiso.2019.01.024

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Small-scale production of 67 Cu for a preclinical study via the 64 Ni(α, p) 67 Cu channel2018

    • Author(s)
      Ohya Tomoyuki、Nagatsu Kotaro、Suzuki Hisashi、Fukada Masami、Minegishi Katsuyuki、Hanyu Masayuki、Zhang Ming-Rong
    • Journal Title

      Nuclear Medicine and Biology

      Volume: 59 Pages: 56-60

    • DOI

      10.1016/j.nucmedbio.2018.01.002

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 共沈を用いたバルクZnターゲットからの67Cu分離精製法2019

    • Author(s)
      大矢 智幸, 永津 弘太郎, 破入 正行, 峯岸 克行, 張 明栄
    • Organizer
      第59回日本核医学会学術総会, 日本核医学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Separation study of silver radionuclides from a palladium target irradiated by cyclotron2019

    • Author(s)
      Tomoyuki Ohya, Kotaro Nagatsu, Masayuki Hanyu, Katsuyuki Minegishi, Ming-Rong Zhang
    • Organizer
      ISRS2019, Society of Radiopharmaceutical Sciences
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Pdをターゲットとした放射性Agの分離精製に関する検討2018

    • Author(s)
      大矢 智幸,永津 弘太郎, 峯岸 克行, 破入 正行, 鈴木 寿, 深田 正美, 張 明栄
    • Organizer
      第58回日本核医学会学術総会
    • Related Report
      2018 Research-status Report
  • [Presentation] Development of a novel evaporator for radiopharmaceuticals preparation2018

    • Author(s)
      鈴木 寿, 大矢 智幸, 永津 弘太郎, 深田 正美, 武井 誠, 峯岸 克行, 張 明栄
    • Organizer
      第58回日本核医学会学術総会
    • Related Report
      2018 Research-status Report
  • [Presentation] Co-precipitation method to separate 67Cu from a large amount of Zn target2017

    • Author(s)
      Tomoyuki Ohya , Hisashi Suzuki , Masami Fukada , Kotaro Nagatsu , Katsuyuki Minegishi , Masayuki Hanyu , Ming-Rong Zhang
    • Organizer
      22nd International symposium on radiopharmaceutical science (ISRS)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2023-01-30  

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