title: Project for the development of the linac based NCT facility in University of Tsukuba.
abstract: A project team headed by University of Tsukuba launched the development of a new accelerator based BNCT facility. In the project, we have adopted Radio-Frequency Quadrupole (RFQ)+Drift Tube Linac (DTL) type linac as proton accelerators. Proton energy generated from the linac was set to 8MeV and average current was 10mA. The linac tube has been constructed by Mitsubishi Heavy Industry Co. For neutron generator device, beryllium is selected as neutron target material; high intensity neutrons are generated by the reaction with beryllium and the 80kW proton beam. Our team chose beryllium as the neutron target material. At present beryllium target system is being designed with Monte-Carlo estimations and heat analysis with ANSYS. The neutron generator consists of moderator, collimator and shielding. It is being designed together with the beryllium target system. We also acquired a building in Tokai village; the building has been renovated for use as BNCT treatment facility. It is noteworthy that the linac tube had been installed in the facility in September 2012. In BNCT procedure, several medical devices are required for BNCT treatment such as treatment planning system, patient positioning device and radiation monitors. Thus these are being developed together with the linac based neutron source. For treatment planning system, we are now developing a new multi-modal Monte-Carlo treatment planning system based on JCDS. The system allows us to perform dose estimation for BNCT as well as particle radiotherapy and X-ray therapy. And the patient positioning device can navigate a patient to irradiation position quickly and properly. Furthermore the device is able to monitor movement of the patient׳s position during irradiation.
authors.affiliation: Proton Medical Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan. Electronic address: kumada@pmrc.tsukuba.ac.jp.
authors.forename: H
authors.initials: H
authors.lastname: Kumada
authors.affiliation: Department of Neurosurgery, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Matsumura
authors.affiliation: Proton Medical Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Sakurai
authors.affiliation: Proton Medical Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Sakae
authors.affiliation: High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yoshioka
authors.affiliation: High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Kobayashi
authors.affiliation: High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Matsumoto
authors.affiliation: Laboratory of Quantum Beam System, Hokkaido University, Sapporo, Hokkaido 060-0808, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kiyanagi
authors.affiliation: J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Shibata
authors.affiliation: J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Nakashima
mesh_terms: D016754:Boron Neutron Capture Therapy / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005160:Facility Design and Construction / Q000295:instrumentation*; D007564:Japan; D010315:Particle Accelerators / Q000295:instrumentation*; D011874:Radiometry / Q000295:instrumentation*
keywords: Accelerator based BNCT; Accelerator based neutron source; Beryllium target; Linac; Treatment planning system