Method of checking an isocentre and a patient-positioning device of an ion beam therapy system
First Claim
1. A method of checking an isocentre and a patient-positioning device of a heavy ion beam therapy system comprising the steps of:
- representing a centre point inside a spherical phantom by means of a metallic specimen body, rendering visible the centre point of the specimen body by several image-forming methods, aligning laser beams on the centre point of the specimen body, checking the positions of the laser beam lines for horizontality and verticality, measuring a spatial position of the centre point under the image-forming methods, measuring departures results of the spatial position of the centre point under the image-forming methods from a predetermined intervention threshold, and inspecting the heavy ion beam therapy system.
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Abstract
The present invention relates to a method of checking an isocentre and a patient-positioning device of an ion beam therapy system that comprises a grid scanner device, arranged in a beam guidance system, having vertical deflection means and horizontal deflection means for the vertical and horizontal deflection of a treatment beam perpendicular to its beam direction, with the result that the treatment beam is deflected by the grid scanner device onto an isocentre of the irradiation site, and a specific area surrounding the isocentre is scanned, wherein a check of the isocentre and a patient-positioning device is carried out and the patient-positioning device comprises a patient table rotatable about an axis of rotation of the table. For the checking, a target point within a spherical phantom is represented by means of a special specimen body and the centre point of the specimen body is visibly represented by means of several image-forming methods. On departure of the measurement results in respect of the spatial position of the centre point under the image-forming methods from a predetermined intervention threshold, the ion beam therapy system is subjected to an inspection and/or maintenance.
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Citations
34 Claims
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1. A method of checking an isocentre and a patient-positioning device of a heavy ion beam therapy system comprising the steps of:
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representing a centre point inside a spherical phantom by means of a metallic specimen body, rendering visible the centre point of the specimen body by several image-forming methods, aligning laser beams on the centre point of the specimen body, checking the positions of the laser beam lines for horizontality and verticality, measuring a spatial position of the centre point under the image-forming methods, measuring departures results of the spatial position of the centre point under the image-forming methods from a predetermined intervention threshold, and inspecting the heavy ion beam therapy system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
at least one ion source (1) an accelerator device (2, 5) for the acceleration of the ions of the ion source (1) in the form of a heavy ion beam (11), a beam guidance system (6, 8), to guide the heavy ion beam (11) from the accelerator device (2, 5) to at least one irradiation site for treatment of a patient, the beam guidance system (6, 8) comprising at least one beam guidance channel (6), and a grid scanner device, arranged in the beam guidance system (6, 8), having vertical deflection means (13) and horizontal deflection means (14) for the vertical and horizontal deflection of the heavy ion beam (11) perpendicular to its beam direction, with the result that the heavy ion beam is deflected by the grid scanner device to an isocentre (10) of the irradiation site and a specific area surrounding the isocentre (10) is scanned, and wherein the patient-positioning device a patient table rotatable about an axis of rotation of the table.
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Specification