Patent ID: 6635882
Filing Date: 2003-10-21
Classification: A61N,G21K

Abstract:
A gantry system for adjusting and aligning an ion beam (1) onto a target (2) from a freely determinable effective treatment angle, wherein the ion beam (1) is supplied to the gantry system (6) in the horizontally arranged gantry rotation axis (4) and firstly is deflected away from the gantry rotation axis (4) by means of magnetic optics and then is arranged to be so aligned onto a target (2) at adjustable angles of from 0 to 360Â° around the gantry rotation axis (4) that the ion beam (1) intersects the gantry rotation axis (4) in the isocentre (5) of the gantry system (6), the gantry system (6) having a gantry (14) and a target carrier system (7) which has a rotatable target carrier (8), the carrier rotation axis (13) of which is arranged in the isocentre in a vertical direction with respect to the gantry rotation axis (4), wherein the final deflection magnet (9) so deflects the ion beam (1) that it intersects the gantry rotation axis (4) in the isocentre (5) at an angle of between greater than or equal to 45Â° and less than 90Â°, so that the ion beam (1) describes a surface of a cone on rotation of the gantry (14) through a full revolution about the gantry rotation axis (4), wherein the carrier rotation axis (13) of the target carrier (8) can be brought onto the isocentre (5) of the gantry system (6), and wherein the target carrier system (7) has a revolving platform (15), which is rotatable about a vertical revolving platform axis (16), on which two target carriers (8) are arranged in two positions (10, 11), which are perpendicular to one another in a vertical plane, and each of which is rotatable about a vertical carrier rotation axis (13).