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

Attempt of actinium -225 source production and the application for alpha-ray medical treatment

Research Project

Project/Area Number 19K22596
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 52:General internal medicine and related fields
Research InstitutionKyoto University

Principal Investigator

Ohtsuki Tsutomu  京都大学, 複合原子力科学研究所, 特任教授 (50233193)

Project Period (FY) 2019-06-28 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords医用放射性同位元素 / 線源内療法 / 加速器 / 研究用原子炉 / 分析技術 / 半減期 / 核分裂 / 放射性同位元素 / 電子線加速器 / 断面積シミュレーション
Outline of Research at the Start

本研究では、まず、非アルファ放出核種であるBaやMo,Cu,Ge,等を用いて電子線による医療用放射性同位体の生成断面積等を実験及びシミュレーション両面から検討を行いう。また、これらの核データ取得から得られるパラメータをもとに、ウラン系列の放射性廃棄物として多量に存在するラジウム-226(Ra-226)を、高エネルギーガンマ線を用いて前立腺がん等の核医学治療に有効なAc-225の製造の基礎検討を行う[Ra-226(γ,n)Ra-225→β壊変→Ac-225]。さらに将来的に有用とされるDDS を目指したRIナノコンテナなどへの応用を探ることを目指す。

Outline of Final Research Achievements

An Ac-225 has nuclear properties well suited for use in targeted alpha therapy and clinical trials have demonstrated the applicability of radiopharmaceuticals containing Ac-225 to treat various cancers. In this work, thus accelerator-based Ac-225 production systems have been developed. We have carried out an experimental study on the production of Ra-226(gamma,n)Ra-225 using an electron linear accelerator and here Ra-225 decays to Ac-225 for the objective targeted alpha therapy(TAT).
We pushed forward preparations to get associated knowledge including the TAT for the application such as nano-containers of such alpha emitted nuclide (Ac-225)in C60, C70 and C82 fullerene in body. Furthermore, in nuclear data as the relation in the present work, we acquired the characteristics of half-life of small atomic number radioisotopes such as Be-7. Nuclear fission properties accompanied with the huge resonance in such as Th-232 and/or U-238 etc.

Academic Significance and Societal Importance of the Research Achievements

前立腺等のがんは年々増加しているのが現状であり、それに伴い、アルファ線放出核種(RI)による核医学治療が重要度を増してきている。しかし、日本では前立腺がんや骨がんの放射性薬剤としての認可を受けたばかりであり、この分野の早急な進展が望まれている。本研究では、ウラン系列の放射性廃棄物として多量に存在するラジウム-226(Ra-226)を、高エネルギーガンマ線を用いて前立腺がん等の核医学治療に有効なAc-225の製造を試み、RIナノコンテナなどへの応用を探るという学術的意義が大きい。また、関係する研究としてBe-7の半減期やU-238などの核データの新たな知見を得た。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (34 results)

All 2024 2023 2022 2021 2020 2019

All Journal Article (16 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 15 results,  Open Access: 4 results) Presentation (18 results) (of which Int'l Joint Research: 8 results,  Invited: 6 results)

  • [Journal Article] Electron-capture decay rate of Be-7 in cluster and crystal forms of beryllium: A first-principles study2024

    • Author(s)
      Kuwahara Riichi、Ohno Kaoru、Tsutomu Ohtsuki
    • Journal Title

      Physical Review C

      Volume: 109 Issue: 2 Pages: 0246091-11

    • DOI

      10.1103/physrevc.109.024609

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Giant dipole resonance photofission and photoneutron reactions in U-238 and Th-2322024

    • Author(s)
      Filipescu D.、Gheorghe I.、Goriely S.、Tudora A.、Nishio K.、Ohtsuki T.、Wang H.、Fan G.、Stopani K.、Suzaki F.、Hirose K.、Inagaki M.、Lui Y.-W.、Ari-izumi T.、Miyamoto S.、Otsuka T.、Utsunomiya H.
    • Journal Title

      Physical Review C

      Volume: 109 Issue: 4 Pages: 0446021-23

    • DOI

      10.1103/physrevc.109.044602

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electron-capture decay rate of Be-7 encapsulated in a C70 fullerene cage2023

    • Author(s)
      Ohtsuki Tsutomu、Kuwahara Riichi、Ohno Kaoru
    • Journal Title

      Physical Review C

      Volume: 108 Issue: 1

    • DOI

      10.1103/physrevc.108.l011301

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A quantitative description of the compatibility of technetium-selective chromatographic technetium-99m separation with low specific activity molybdenum-992023

    • Author(s)
      Jaewoong Jang, Shun Sekimoto, Tsutomu Ohtsuki, Katsuyoshi Tatenuma, Akira Tsuguchi, Mitsuru Uesaka
    • Journal Title

      Journal of Chromatography A

      Volume: 1705 Pages: 464192-464192

    • DOI

      10.1016/j.chroma.2023.464192

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Technique for estimating the charge number of individual radioactive particles using Kelvin probe force microscopy2023

    • Author(s)
      Shinke Yukimi、Mori Tatsuhiro、Iwata Ayumi、Mohd Nor Muhammad Aiman bin、Kurosawa Keiichi、Inagaki Makoto、Sekimoto Shun、Takamiya Koichi、Oki Yuichi、Ohtsuki Tsutomu、Igarashi Yasuhito、Okuda Tomoaki
    • Journal Title

      Aerosol Science and Technology

      Volume: 57 Issue: 8 Pages: 758-768

    • DOI

      10.1080/02786826.2023.2221726

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Photofission and photoneutron cross sections for U-238 and Th-2322023

    • Author(s)
      Filipescu Dan、Wang Hongwei、Fan Gongtao、Nishio Katsuhisa、Ohtsuki Tsutomu、Gheorghe Ioana、Stopani Konstantin、Tudora Anabella、Suzaki Fumi、Hirose Kentaro、Inagaki Makoto、Bj?r?en Marianne、Lui Yiu-Wing、Ari-izumi Takashi、Miyamoto Shuji、Utsunomiya Hiroaki
    • Journal Title

      EPJ Web of Conferences

      Volume: 284 Pages: 040101-4

    • DOI

      10.1051/epjconf/202328404010

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Measurement of neutron flux parameters for implementation of k0-INAA at Kyoto University Research Reactor2022

    • Author(s)
      Soliman Mohamed、Abdou Fatma S.、Ho Van-Doanh、Sekimoto Shun、Takamiya Koichi、Mohamed Nader M. A.、Ohtsuki Tsutomu
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: 331 Issue: 9 Pages: 3949-3956

    • DOI

      10.1007/s10967-022-08391-1

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 福島原発事故に由来する不溶性放射性微粒子のレーザー加熱による模擬生成実験2022

    • Author(s)
      稲垣誠, 関本俊, 高宮幸一, 沖雄一, 大槻勤
    • Journal Title

      Proceedings of the 23rd Workshop on Environmental Radioactivity

      Volume: 2022 Pages: 159-164

    • Related Report
      2022 Research-status Report
    • Open Access
  • [Journal Article] Coprecipitation with samarium hydroxide using multitracer produced through neutron-induced fission of 235U toward chemical study of heavy elements2022

    • Author(s)
      Kasamatsu Yoshitaka、Nagase Masahiro、Ninomiya Hidemi、Watanabe Eisuke、Shigekawa Yudai、Kondo Narumi、Takamiya Koichi、Ohtsuki Tsutomu、Shiohara Naoya、Shinohara Atsushi
    • Journal Title

      Applied Radiation and Isotopes

      Volume: 179 Pages: 110006-110006

    • DOI

      10.1016/j.apradiso.2021.110006

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Creation of Mo/Tc@C<sub>60</sub> and Au@C<sub>60</sub> and molecular-dynamics simulations2021

    • Author(s)
      Ohtsuki Tsutomu、Manjanath Aaditya、Ohno Kaoru、Inagaki Makoto、Sekimoto Shun、Kawazoe Yoshiyuki
    • Journal Title

      RSC Advances

      Volume: 11 Issue: 32 Pages: 19666-19672

    • DOI

      10.1039/d0ra10196f

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Co-precipitation behaviour of single atoms of rutherfordium in basic solutions2021

    • Author(s)
      Y. Kasamatsu, K. Toyomura, H. Haba, T. Yokokita, A. Kino, Y. Yasuda, Y. Komori, J. Kanaya, M.H. Huang, M. Murakami, H. Kikunaga, E. Watanabe, T. Yoshimura, K. Morita, T. Mitsugashira, K. Takamiya, T. Ohtsuki, A. Shinohara
    • Journal Title

      NATURE CHEMISTRY

      Volume: 13 Issue: 3 Pages: 226-230

    • DOI

      10.1038/s41557-020-00634-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Design and testing of a W-MoO3 target system for electron linac production of 99Mo/99mTc2021

    • Author(s)
      J. Jang, H. Kikunaga, S. Sekimoto, M. Inagaki, T. Kawakami, T. Ohtsuki, Sh. Kashiwagi, K. Takahashi, K. Tsukada, K. Tatenuma, M. Uesaka
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A

      Volume: 987 Pages: 164815-164815

    • DOI

      10.1016/j.nima.2020.164815

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Uncertainty derived from elemental analysis and its effect on the separation of radioactive waste into low-level radioactive waste and waste for clearance2021

    • Author(s)
      N. Kinoshita, T. Noto, K. Kosako, M. Aasada, K. Torii, A. Tada, K. Urabe, T. Ohtsuki, S. Sekimoto
    • Journal Title

      Progress in Nuclear Energy

      Volume: 131 Pages: 103597-103597

    • DOI

      10.1016/j.pnucene.2020.103597

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Estimation of 47Sc and 177Lu production-rates from their natural targets in Kyoto University Research Reactor2020

    • Author(s)
      M. Sliman, N.M.A. Mohamed, K. Takamiya, S. Sekimoto, M. Inagaki, Y. Oki, T. Ohtsuki
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: in press Issue: 3 Pages: 1099-1107

    • DOI

      10.1007/s10967-020-07156-y

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Production of 99Mo/99mTc by photonuclear reaction using a nat-MoO3 target2020

    • Author(s)
      M. Inagaki, S. Sekimoto, W. Tanaka, T. Tadokoro, Y. Ueno, Y. Kani, T. Ohtsuki
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: in press Issue: 2 Pages: 681-686

    • DOI

      10.1007/s10967-020-07086-9

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Production of 47Sc, 67Cu, 68Ga, 105Rh, 177Lu, and 188Re using electron linear accelerator2019

    • Author(s)
      Makoto Inagaki, Shun Sekimoto, Wataru Tanaka, Takahiro Tadokoro, Yuichiro Ueno, Yuko Kani, Tsutomu Ohtsuki
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: 322 Issue: 3 Pages: 1703-1709

    • DOI

      10.1007/s10967-019-06904-z

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Electron-capture decay rate of Be-7 in fullerenes and Be metal2023

    • Author(s)
      Ohtsuki Tsutomu
    • Organizer
      Oahu Post DNP-JPS workshop
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 赤外線ファイバーレーザーによるフラーレンの生成と放射性核種内包に向けた基礎実験2023

    • Author(s)
      稲垣誠、秋山和彦、大槻勤
    • Organizer
      日本放射化学会第67回討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Experimental production of Ac-225 using an electron linear accelerator: Scaling up the production to MBq level and improving the quality2023

    • Author(s)
      Maeda M., Tadokoro T., Ueno Y., Kani Y., Nishida K., Koiwai T., Sasaki T., Watanabe T., Yoshimoto M., Ohnuki K., Fujii H., Kikunaga H., Kashiwagi S., Shirasaki K., Sekimoto S., Ohtsuki T., Inagaki M., Fukutani S., Shibahara T.
    • Organizer
      55th Annual Conference of the Society-of-Nuclear-Medicine (SNMICON)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 電子線形加速器を利用した225Acスケールアップ製造及び薬剤標識実験2022

    • Author(s)
      前田瑞穂, 田所孝広, 上野雄一郎, 可児祐子, 西田賢人, 渡辺敬仁, 佐々木貴裕, 菊永英寿, 柏木茂, 白崎謙次,吉本光喜,大貫和信,藤井博史, 大槻勤,関本俊,稲垣誠,福谷哲,芝原雄司
    • Organizer
      日本原子力学会 2022年秋の大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Production experiments for 225Ac using an electron linear accelerator and radiolabeling tests using the produced alpha emitter2022

    • Author(s)
      M. Maeda, T. Tadokoro, Y. Ueno, K. Nishida, Y. Kani, T. Sasaki, T. Watanabe, H. Kikunaga, S. Kashiwagi, K. Shirasaki, S. Sekimoto, T. Ohtsuki, M. Inagaki, S. Fukutani, Y. Shibahara, M. Yoshimoto, K. Ohnuki, H, Fujii
    • Organizer
      Annual Congress of the European Association of Nuclear Medicine, 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] レーザーによる放射性核種内包フラーレンの生成に向けた基礎実験2022

    • Author(s)
      稲垣誠、秋山和彦、関本俊、大槻勤
    • Organizer
      日本放射化学会第66回討論会(2022)
    • Related Report
      2022 Research-status Report
  • [Presentation] 福島原発事故に由来する不溶性微粒子の模擬生成2022

    • Author(s)
      稲垣誠、関本俊、高宮幸一、沖雄一、大槻勤
    • Organizer
      日本放射化学会第66回討論会(2022)
    • Related Report
      2022 Research-status Report
  • [Presentation] Demonstration of Ac-225 production on the order of MBq using an electron linear accelerator2022

    • Author(s)
      T. Tadokoro, M. Maeda, T. Koiwai, K. Nishida, Y. Ueno, Y. Kani, T. Sasaki, T. Watanabe, H. Kikunaga, S. kashiwagi, S. Sekimoto, M. Inagaki, T. Ohtsuki
    • Organizer
      TAT12
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Experimental study on the production of Ac-225 using an electron linear accelerator2021

    • Author(s)
      Takahiro Tadokoro, Yuichiro Ueno, Yuko Kani, Makiko Shimada, Takahiro Sasaki, Takahiro Watanabe, Hidetoshi Kikunaga, Shigeru Kashiwagi, Makoto Inagaki, Shun Sekimoto, Tsutomu Ohtsuki
    • Organizer
      Society of Nuclear Medicine and Molecular Imaging
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Large-scale production experiment for Ac-225 using an electron linear accelerator2021

    • Author(s)
      M. Maeda, T. Tadokoro, Y. Ueno, K. Nishida, Y. Kani, M. Itoh, T. Sasaki, T. Watanabe, H. Kikunaga, S. Kashiwagi, K. Shirasaki, S. Sekimoto, T. Ohtsuki, M. Inagaki
    • Organizer
      Society of Nuclear Medicine and Molecular Imaging
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 電子線形加速器を利用したAc-225製造スケールアップ試験 (1)Ra-226 試料作製及び制動放射線照射試験2021

    • Author(s)
      田所 孝広、前田 瑞穂、西田 賢人、上野 雄一郎、可児 祐子、渡辺 敬仁、伊藤 雅春、佐々木 貴裕、菊永 英寿、柏木 茂、白崎 謙次、大槻 勤、関本 俊、稲垣 誠
    • Organizer
      日本原子力学会 2021年秋の大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 電子線形加速器を利用したAc-225製造スケールアップ試験 (2)Ac-225の分離精製及び定量評価2021

    • Author(s)
      前田 瑞穂、 田所 孝広、西田 賢人、上野 雄一郎、可児 祐子、渡辺 敬仁、伊藤 雅春、佐々木 貴裕、菊永 英寿、柏木 茂、白崎 謙次、大槻 勤、関本 俊、稲垣 誠
    • Organizer
      日本原子力学会 2021年秋の大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 電子線形加速器を利用したAc-225製造量の電子線エネルギー依存性2021

    • Author(s)
      田所孝広, 西田賢人, 上野雄一郎, 可児祐子, 渡辺敬仁, 佐々木貴裕, 島田真生子, 菊永英寿, 柏木茂, 大槻勤, 関本俊, 稲垣誠
    • Organizer
      日本原子力学会2021年春の年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Production of Ac-225 for targeted alpha therapy using an electron linear accelerator2020

    • Author(s)
      T. Tadokoro, Y. Ueno, Y. Kani, M. Shimada, T. Sasaki, T. Watanabe, H. Kikunaga, S. Kashiwagi, S. Sekimoto, T. Ohtsuki
    • Organizer
      EANM2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 電子線形加速器を利用したAc-225の製造基礎試験2020

    • Author(s)
      田所孝広, 上野雄一郎, 可児祐子, 渡辺敬仁, 佐々木貴裕, 島田真生子, 菊永英寿, 柏木茂, 大槻勤, 関本俊
    • Organizer
      日本原子力学会2020年秋の大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Project on Research Reactor Utilization(RRU)2019

    • Author(s)
      Tsutomu Ohtsuki
    • Organizer
      Forum for Nuclear Cooperation in Asia,kazakhstan
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Medical Radioisotopes Production using an Electron Linear Accelerator2019

    • Author(s)
      M. Inagaki, S. Sekimoto T. Tadokoro, Y. Kani, Y. Ueno, T. Ohtsuki
    • Organizer
      Forum for Nuclear Cooperation in Asia,kazakhstan
    • Related Report
      2019 Research-status Report
  • [Presentation] クラウンエーテル樹脂を用いたカラムクロマトグラフ法によるモリブデン同位体濃縮2019

    • Author(s)
      田野城 一希、加藤 千図、福谷 哲、関本 俊、大槻 勤、大野 剛、藤井 俊行
    • Organizer
      日本原子力学会年2019秋の大会
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-07-04   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi