Commissioning of a clinical pencil beam scanning proton therapy unit for ultra-high dose rates (FLASH)

Purpose null The purpose of this work was to provide a flexible platform for FLASH research with protons by adapting a former clinical pencil beam scanning gantry to irradiations with ultra-high dose rates. null Methods null PSI Gantry 1​ treated patients until December 2018. We optimized the beamline parameters to transport the 250 MeV beam extracted from the PSI COMET accelerator to the treatment room, maximizing the transmission of beam...