Preliminary study of MAGAT polymer gel dosimetry for boron-neutron capture therapy

8th International Conference on 3D Radiation Dosimetry

Hayashi, Shin-Ichiro^1 ; Sakurai, Yoshinori^2 ; Uchida, Ryohei^3 ; Suzuki, Minoru^2 ; Usui, Shuji^1 ; Tominaga, Takahiro^1

Department of Clinical Radiology, Faculty of Health Sciences, Hiroshima International University, Higashi-Hiroshima, Hiroshima

739-2695, Japan^1

Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka

590-0494, Japan^2

Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto

615-8530, Japan^3

关键词: Boron neutron capture therapy;    Effective tool;    Energy spectra;    Irradiation facilities;    Kyoto University Research Reactors;    Polymer gel dosimetry;    Thermal neutrons;    Transverse relaxation rate;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/573/1/012074/pdf
DOI  :  10.1088/1742-6596/573/1/012074

来源: IOP

【 摘 要 】

MAGAT gel dosimeter with boron is irradiated in Heavy Water Neutron Irradiation Facility (HWNIF) of Kyoto University Research Reactor (KUR). The cylindrical gel phantoms are exposed to neutron beams of three different energy spectra (thermal neutron rich, epithermal and fast neutron rich and the mixed modes) in air. Preliminary results corresponding to depth-dose responses are obtained as the transverse relaxation rate (R2=1/T2) from magnetic resonance imaging data. As the results MAGAT gel dosimeter has the higher sensitivity on thermal neutron than on epi-thermal and fast neutron, and the gel with boron showed an enhancement and a change in the depth-R2response explicitly. From these results, it is suggested that MAGAT gel dosimeter can be an effective tool in BNCT dosimetry.