IONENSTRAHL-THERAPIEANLAGE UND VERFAHREN ZUM BETRIEB DER ANLAGE

摘要

The present invention relates to an ion beam therapy system comprising a plurality of separate patient treatment stations each having a patient support for orienting a patient in a fixed position, a source of ions, an accelerator system for accelerating ions as a beam and an ion beam transport system for directing an ion beam from the accelerator to the treatment stations to treat patients supported in fixed orientation by the patient support, wherein said ion beam transport system comprises at least a horizontal beam delivery system and at least a gantry (8) rotateable about an axis of rotation, wherein said gantry carries optics for receiving an ion beam on its axis of rotation transporting said ion beam away from the axis of rotation and returning the ion beam on a path intersecting the axis at a target isocentre within the patient delivering said ion beam by rotation of the gantry to said target isocentre from different angles between 0 and 360 degrees and wherein said gantry carries means for raster scanning said ion beam enclosing a vertical deflection means and a horizontal deflection means positioned upstream of a last bending magnet directing said ion beam towards the patient and downstream the last quadrupole lens of said gantry, wherein said vertical deflection means and said horizontal deflection means deflects said ion beam perpendicular to its beam axis so that the beam can be scanned over a predetermined controlled area around said target isocentre after passing said last bending magnet.