RefleXion X1 linac
RefleXion X1 is the first Biology-guided Radiotherapy (BgRT) system consisting of a 6MV flattening-filter-free (FFF) linear accelerator mounted on the 85 cm gantry ring rotating at 60 rpm and delivering the treatment using one isocenter in axial fashion advancing the couch every 2.1 mm. Modulation is achieved using 64 binary pneumatically-driven multi-leaf fast-transitioning collimators (MLC). Two sets of jaws, positioned above and below the MLCs, are used to set the maximum field extent in the patient superior-inferior direction: either 1 cm or 2 cm at isocenter. The X1 is also equipped with fan-beam kilovoltage computed tomography (kVCT) of near-diagnostic image quality, megavoltage portal, and positron emission tomography (PET) imaging subsystem.