Centers & Labs

RIKEN Innovation Center

3D Gel Dosimeter Research Laboratory

Team Leader: Toshimasa Hamada
Deputy Team Leader: Yasuhiro Ishida (D.Eng.)
Toshimasa  Hamada Yasuhiro Ishida

In radiotherapy to treat cancer, it is essential to accurately adjust irradiation position and dose in advance to avoid irradiation of healthy tissue as much as possible. Because 3D gel dosimeters can be made with materials and in a size compatible with the human body, and the irradiated part does not depend on the direction of radiation but responds to the radiation dose, we consider these dosimeters to be useful for evaluating and validating treatment strategies in a precise manner. We will proceed to develop novel 3D gel dosimeters with the objective to design a product for practical application.
[Integrated Collaborative Research with Nissan Chemical Industries, Ltd.]

Main Research Field

Medicine, dentistry, and pharmacy

Related Research Fields



  • Radiotherapy
  • Gel Dosimeter

Selected Publications

  1. Takanashi, T., Kawamura, H., Fukasaku, K., Sahade, D. A., and Hamada, T.
    "A comparison of the dose–response behavior of AQUAJOINT®-based polymer gel and PAGAT gel dosimeters measured using Optical CT and MRI"
    Journal of Physics: Conf. Series 847, 012013 (2017)

Lab Members

Principal Investigator

Toshimasa Hamada
Team Leader

Core Members

Yasuhiro Ishida
Deputy Team Leader
Takaoki Takanashi
Research Scientist
Daniel antonio Sahade
Visiting Scientist
Kazuaki Fukasaku
Visiting Scientist
Mikio Nemoto
Visiting Scientist
Hiraku Kawamura
Visiting Scientist
Takuya Maeyama
Visiting Scientist
Yoshihiro Kudo
Visiting Scientist
Kawori Yanagisawa
Visiting Technician
Yuki Shiraishi
Part-time Worker

Contact information

2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Tel: +81-(0)48-467-1348

Email: toshimasa.hamada [at]

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