Optimum design of a moderator system based on dose calculation for an accelerator driven Boron Neutron Capture Therapy.
An accelerator based BNCT has been desired because of its therapeutic convenience. However, optimal design of a neutron moderator system is still one of the issues. Therefore, detailed studies on materials consisting of the moderator system are necessary to obtain the optimal condition. In this study, the epithermal neutron flux and the RBE dose have been calculated as the indicators to look for optimal materials for the filter and the moderator. As a result, it was found that a combination of MgF2 moderator with Fe filter gave best performance, and the moderator system gave a dose ratio greater than 3 and an epithermal neutron flux over 1.0×10(9)cm(-2)s(-1).
Graduate School of Engineering, Hokkaido University, Hokkaido 060-8628, Japan. Electronic address: r-inoue@eng.hokudai.ac.jp.
R
R
Inoue
Faculty of Engineering, Hokkaido University, Hokkaido 060-8628, Japan.
F
F
Hiraga
Faculty of Engineering, Hokkaido University, Hokkaido 060-8628, Japan.
Y
Y
Kiyanagi
D016754:Boron Neutron Capture Therapy / Q000295:instrumentation*; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005459:Fluorides / Q000737:chemistry / Q000528:radiation effects*; D007501:Iron / Q000737:chemistry / Q000528:radiation effects*; D017616:Magnesium Compounds / Q000737:chemistry / Q000528:radiation effects*; D008422:Materials Testing; D015233:Models, Statistical; D009502:Neutrons; D010315:Particle Accelerators / Q000295:instrumentation*; D011835:Radiation Protection / Q000295:instrumentation*; D011874:Radiometry; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*
D017616:Magnesium Compounds; C031288:magnesium fluoride; D007501:Iron; D005459:Fluorides
BNCT; Dose; Epithermal neutron; Moderator system; Proton accelerator