Patent ID: 8063381

Claim:
A particle therapy gantry for delivering a particle beam to a patient comprising: a beam tube defining a particle beam path; a plurality of dipole magnets sequentially arranged along the beam tube for guiding the particle beam along the particle beam path; and a plurality of quadrupole magnets that provide a fully achromatic and uncoupled beam transport for the unconstrained particle beam at the gantry entrance to the gantry isocenter; wherein the size and shape of the particle beam is independent of the angle of gantry rotation, and wherein the gantry can be rotated by any angle between 0 and 360 with respect to a fixed incoming beam line wherein the plurality of quadrupoles comprises six quadrupoles arranged in three quadrupole pairs with each quadrupole pair symmetrically arranged about the center between each pair of dipole magnets adjacent to the three quadrupole pairs.