Device and method for controlling a raster scanner in ion-beam therapy
First Claim
1. Apparatus for the feedback control of a grid scanner in ion beam therapy, which has, at least, the following devices:
- scanner magnet current supply devices (MGN) for ion beam scanner magnets that deflect horizontally (X) and vertically (Y) with respect to the middle of the ion beam, the supply devices (MGN) being controlled by control and read-out modules (SAMS) for the scanner magnets, a location-sensitive detector (MWPC1) for location measurement, which is controlled by means of a control and read-out module (SAMO1), a sequence control device (VMEAS), which controls the activation and read-out sequence among the devices of the apparatus, characterized in that the apparatushas in the sequence control device (VMEAS) a circuit arrangement having a feedback loop between the control and read-out modules (SAMS) for the scanner magnets and the control and read-out module (SAMO1) of the location-sensitive detector (MWPC1) and, in circuitry and sequence, the control and read-out modules (SAMS) for the scanner magnets and the control and read-out module (SAMO1) of the location-sensitive detector (MWPC1) in the sequence control device (VMEAS) are technically so arranged that the control and read-out modules (SAMS) for the scanner magnets are arranged serially after the control and read-out module (SAMO1) of the location-sensitive detector (MWPC1).
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Accused Products
Abstract
The invention relates to an apparatus and a method for the feedback control of a grid scanner in ion therapy. An apparatus of that kind for the feedback control of a grid scanner has scanner magnet current supply devices for ion beam scanner magnets that deflect horizontally and vertically with respect to the middle of the ion beam, the supply devices being controlled by control and read-out modules for the scanner magnets. Furthermore, the apparatus has a location-sensitive detector for location measurement, which is controlled by means of a control and read-out module. A sequence control device controls the activation and read-out sequence among the devices of the apparatus, the apparatus also having in the sequence control device a circuit arrangement having a feedback loop between the control and read-out modules for the scanner magnets and the control and read-out module of the location-sensitive detector. For that, the control and read-out modules for the scanner magnets and the control and read-out module of the location-sensitive detector in the sequence control device are technically so arranged, in circuitry and sequence, that the control and read-out modules for the scanner magnets are arranged serially after the control and read-out module of the location-sensitive detector.
65 Citations
10 Claims
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1. Apparatus for the feedback control of a grid scanner in ion beam therapy, which has, at least, the following devices:
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scanner magnet current supply devices (MGN) for ion beam scanner magnets that deflect horizontally (X) and vertically (Y) with respect to the middle of the ion beam, the supply devices (MGN) being controlled by control and read-out modules (SAMS) for the scanner magnets, a location-sensitive detector (MWPC1) for location measurement, which is controlled by means of a control and read-out module (SAMO1), a sequence control device (VMEAS), which controls the activation and read-out sequence among the devices of the apparatus, characterized in that the apparatus has in the sequence control device (VMEAS) a circuit arrangement having a feedback loop between the control and read-out modules (SAMS) for the scanner magnets and the control and read-out module (SAMO1) of the location-sensitive detector (MWPC1) and, in circuitry and sequence, the control and read-out modules (SAMS) for the scanner magnets and the control and read-out module (SAMO1) of the location-sensitive detector (MWPC1) in the sequence control device (VMEAS) are technically so arranged that the control and read-out modules (SAMS) for the scanner magnets are arranged serially after the control and read-out module (SAMO1) of the location-sensitive detector (MWPC1). - View Dependent Claims (2, 3)
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4. Method for the feedback control of a grid scanner in ion beam therapy, wherein the grid scanner has, at least, the following devices:
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scanner magnet current supply devices (MGN) for ion beam scanner magnets that deflect horizontally (X) and vertically (Y) with respect to the middle of the ion beam, the supply devices (X, Y) being controlled by control and read-out modules (SAMS) for the scanner magnets, a location-sensitive detector (MWPC1) for location measurement, which is controlled by means of a control and read-out module (SAMO1), a sequence control device (VMEAS), which controls the activation and read-out sequence among the devices of the apparatus, and wherein the method is characterized by the following steps; comparison of information, deposited in the location measurement control and read-out module (SAMO1) of a supervisory control system and relating to the desired position of the beam plan, with the actual measured position of the beam position from a location-sensitive detector, in real time, determination of a correction value for the scanner magnet supply devices (MGN) of the grid scanner, and setting the correction value for the horizontal and vertical magnet supply devices (X, Y) of the grid scanner and realignment of the beam position. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification