Simulation for improved collimation system of gamma-ray telescope system for boron neutron capture therapy at Kyoto...

A gamma-ray telescope system has been used at Heavy Water Neutron Irradiation Facility at Kyoto University Reactor mainly for boron neutron capture therapy (BNCT) for multiple hepatic tumors. This system has been improved to accommodate BNCT for other sites, such as brain, head and neck, lung, breast, etc. Simulation for the collimation system was performed. It revealed that the effective telescope field-of-view could be expanded from approximately 3-21 cm.