Details of treatment apparatus

Past: nuclear reactor-based apparatus

× Complicated maintenance
× Complicated handling
× Subject to nuclear reactor regulations

Not suitable as a medical device

JRR-4 Medical irradiation system

From now on: accelertor based treatment apparatus not requiring nuclear reactor (currerently under development)


Can be installed in hospitals as a medical device


Proton beam is accelerated by a linear accelerator of about 7m in length, and reacts with beryllium, a metallic element placed in the neutron generator, to generate neutrons.
Energy-adjusted neutron beam is irradiated to the target lesion.

Details of the research center

Ibaraki Neutron Medica1 Reserch Center
162-1 Shirakata Tokaimura Naka Ibaraki Prefecture, 319-1106

The treatment apparatus in development will be situated in the Ibaraki Neutron Medical Research Center in Tokai-mura, Naka-gun, Ibaraki, under the jurisdiction of Ibaraki Prefecture. In this center, we will first test the performance of the apparatus in animals and then start the treatment of patients. In this project, are developing not only the neutron-generating treatment apparatus, but also other medical devices required for the treatment, as well as radiation measuring devices and software.

(Click image for larger view)

Details of Research and Development team

Shunichi Kurihra, Hitoshi Kobayashi, Hiroshi Matsumoto, Masakazu Yoshioka (KEK)
Toshiyuki Ohba, Kouji Okazaki, Susumu Tanaka (NAT)
Ibaraki BNCT Group (Tsukuba University, Hokkaido University, JAEA, Mitsubishi Heavy Industries, Ibaraki Prefecture)
Private enterprises joint development, and it's with the cooperation of many companies other.

▲ Back to top