The invention relates to a gantry system for a particle therapy facility,
having a beam guidance gantry which has elements for beam guidance, and
having a measurement gantry which has a device for beam monitoring. The
measurement gantry and beam guidance gantry are thus of a mutually
independent design and are, in particular, arranged in a mutually
concentric manner. A gantry system of this kind is inter alia less
susceptible to mechanical deviations during rotation of the beam guidance
gantry.