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US 6,891,177 B1Granted
Ion beam scanner system and operating method
AssigneeGesellschaft fuer Schwerionenforschung mbH
InventorsGerhard Kraft, Ulrich Weber
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AssigneeGesellschaft fuer Schwerionenforschung mbH
InventorsGerhard Kraft, Ulrich Weber
Estimating the term…
The invention relates to an ion beam scanning system having an ion source device, an ion acceleration system and an ion beam guidance system comprising an ion beam outlet window for a converging centered ion beam, and a mechanical alignment system for the target volume to be scanned. For that purpose, the ion acceleration system can be set to an acceleration of the ions required to obtain a maximum depth of penetration. The scanning system also has energy absorption means arranged in the path of the ion beam between the target volume and the ion beam outlet window transverse to the center of the ion beam. The energy absorption means can be displaced transverse to the center of the ion beam in order to vary the energy of the ion beam, so enabling, in the target volume, depth modulation of the ion beam, which is effected by means of a linear motor and the transverse displacement of the energy absorption means, with depth-staggered scanning of volume elements of the target volume in rapid succession. The invention relates also to a method of ion beam scanning and a method of operating an ion beam scanning system using a gantry system.
An ion beam scanning system having an ion source device, an ion accelerator system that can be set to an acceleration of ions required to obtain a maximum depth of penetration, and an ion beam guidance system (1) comprising an ion beam outlet window (2) for a converging centred ion beam (3), and a mechanical alignment system (4) for a target volume (5) to be scanned,
An ion beam scanning system having an ion source device, an ion accelerator system that can be set to an acceleration of ions required to obtain a maximum depth of penetration, and an ion beam guidance system (3), and a mechanical alignment system (4) for a target volume (5) to be scanned, wherein the scanning system (6) comprises energy absorption means (7) that are arranged in the path of the ion beam between the target volume (5) and the ion beam outlet window (2) transverse to the centre of the ion beam and comprises absorber wedges (13) that can be displaced transverse to the centre of the ion beam, a high-performance linear motor (8) for rapid driving of the absorber wedges (13) and beam-intensity-controlled depth-scanning with transverse displacement of the energy absorption means (7), so that the depth-staggering scanning of volume elements (9) of a tumour tissue (11) can be carried out in rapid succession,
A method of ion beam scanning using an ion source device, an ion accelerator system and an ion beam guidance system (1) comprising an ion beam outlet window (2) for a converging centered ion beam (3), and a mechanical alignment system (4) for scanning a target volume (5), the scanning system (6) comprising energy absorption means (7) and an ionisation chamber (16), which is arranged upstream of the energy absorption means (7), comprising the steps of:
A method of ion beam scanning using an ion source device, an ion accelerator system and an ion beam guidance system (1) comprising an ion beam outlet window (2) for a converging centered ion beam (3), and a mechanical alignment system (4) for scanning a target volume (5), the scanning system (6) comprising energy absorption means (7) and an ionisation chamber (16), which is arranged upstream of the energy absorption means (7), comprising the steps of:
An ion beam scanning system having an ion source device, an ion accelerator system that can be set to an acceleration of ions required to obtain a maximum depth of penetration, and an ion beam guidance system (1) comprising an ion beam outlet window (2) for a converging centred ion beam (3), and a mechanical alignment system (4) for a target volume (5) to be scanned, wherein the scanning system (6) comprises energy absorption means (7) that are arranged in the path of the ion beam between the target volume (5) and the ion beam outlet window (2) transverse to the centre of the ion beam and comprises absorber wedges (13) that can be displaced transverse to the centre of the ion beam, a high-performance linear motor (8) for rapid driving of the absorber wedges (13) and beam-intensity-controlled depth-scanning with transverse displacement of the energy absorption means (7), so that depth-staggered scanning of volume elements (9) of a tumour tissue (11) can be carried out in rapid succession and wherein the linear motor comprises rotors (31) mounted on air bearings.
Dependencies are inferred from the claim text.