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Abstract

The present invention relates to a gantry system for transport, delivery and treatment of a high energy ion beam in a heavy ion cancer therapy facility, which comprises two gantry quadrupole magnets (1, 2) positioned on an axis (17) of said gantry downstream of an takeover point of a high energy ion beam transport line and a first 45.degree. bending dipole magnet (3) bending the ion beam away from the gantry axis positioned down stream of said quadrupole magnets (1, 2). Four additional quadrupole magnets (4, 5, 6, 7) are positioned downstream of the first bending magnet for defocusing and focusing the heavy ion beam. A second 45.degree. bending dipole magnet (8) bends the ion beam parallel to the gantry axis (17) and two subsequent quadrupole magnets (9, 10) focus the ion beam toward a scanning system. A horizontal and a vertical scanning magnet (11, 12) positioned upstream a last 90.degree. bending magnet (13) bending the ion beam away from the parallel to the gantry axis toward a perpendicular intersection with the axis at the ISO center scans the ion beam. A stack (14) of horizontal and vertical grids and of a scintillator monitors the profile and the position of the ion beam and of a horizontal and vertical veto counter monitors the position and of an ionization chamber monitors the intensity of the ion beam. Furthermore a positron emitter tomography camera (PET) is installed within a treatment area of the gantry.

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First Claim