Method and irradiation installation for irradiating a target volume
First Claim
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1. A method for irradiating a target volume with an ion beam;
- wherein the irradiation of the target volume is divided over time into at least one radiography phase and at least one deposition phase;
wherein the energy of the ion beam is altered over time between the at least one radiography phase and the at least one deposition phase, such thati) in the at least one radiography phase, the range of the ion beam is distal with respect to the target volume, so that the ion beam passes through the target volume, and wherein by means of the ion beam an ion radiograph of the target volume is acquired by detecting the ion beam with an ion radiography detector that is arranged distal with respect to the target volume; and
ii) in the at least one deposition phase, the range of the ion beam is within the target volume, so that the ion beam is stopped in the target volume to deposit a predetermined dose in the target volume,wherein in the at least one deposition phase, the intensity of the ion beam is set considerably higher than in the at least one radiography phase.
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Abstract
The present disclosure relates to a method and to an irradiation system for irradiating a moving target volume with an ion beam, in particular for tumor therapy, wherein ion radiography measurements of the target volume are performed and the irradiation for deposition purposes and for radiography purposes is performed with the same ion beam but consecutively in time by alternating the energy of the ion beam between a higher radiography energy and a lower deposition energy using, for example, a passive energy modulator proximal with respect to the patient.
18 Citations
28 Claims
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1. A method for irradiating a target volume with an ion beam;
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wherein the irradiation of the target volume is divided over time into at least one radiography phase and at least one deposition phase; wherein the energy of the ion beam is altered over time between the at least one radiography phase and the at least one deposition phase, such that i) in the at least one radiography phase, the range of the ion beam is distal with respect to the target volume, so that the ion beam passes through the target volume, and wherein by means of the ion beam an ion radiograph of the target volume is acquired by detecting the ion beam with an ion radiography detector that is arranged distal with respect to the target volume; and ii) in the at least one deposition phase, the range of the ion beam is within the target volume, so that the ion beam is stopped in the target volume to deposit a predetermined dose in the target volume, wherein in the at least one deposition phase, the intensity of the ion beam is set considerably higher than in the at least one radiography phase. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13)
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6. A method for irradiating a target volume with an ion beam;
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wherein the irradiation of the target volume is divided over time into at least one radiography phase and at least one deposition phase; wherein the energy of the ion beam is altered over time between the at least one radiography phase and the at least one deposition phase, such that i) in the at least one radiography phase, the range of the ion beam is distal with respect to the target volume, so that the ion beam passes through the target volume, and wherein by means of the ion beam an ion radiograph of the target volume is acquired by detecting the ion beam with an ion radiography detector that is arranged distal with respect to the target volume; and ii) in the at least one deposition phase, the range of the ion beam is within the target volume, so that the ion beam is stopped in the target volume to deposit a predetermined dose in the target volume, wherein the movement of the target volume is compensated for by active ion beam tracking, and wherein the active ion beam tracking is controlled in response to the ion radiographs acquired by the ion radiography detector.
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14. A method for irradiating a target volume with an ion beam;
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wherein the irradiation of the target volume is divided over time into at least one radiography phase and at least one deposition phase; wherein the energy of the ion beam is altered over time between the at least one radiography phase and the at least one deposition phase, such that i) in the at least one radiography phase, the range of the ion beam is distal with respect to the target volume, so that the ion beam passes through the target volume, and wherein by means of the ion beam an ion radiograph of the target volume is acquired by detecting the ion beam with an ion radiography detector that is arranged distal with respect to the target volume; and ii) in the at least one deposition phase, the range of the ion beam is within that target volume, so that the ion beam is stopped in the target volume to deposit a predetermined dose in the target volume, wherein in the at least one radiography phase, the target volume is irradiated from more than one direction thereby acquiring at least one ion radiograph with more than two spatial dimensions.
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15. An irradiation system for irradiating a target volume with an ion beam, comprising:
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an accelerator and beam guiding device for generating and accelerating an ion beam and for guiding and directing the ion beam to the target volume; a controller device for controlling the irradiation; a device for varying the energy of the ion beam over time, between at least one radiography phase and at least one deposition phase, by means of which i) in the at least one radiography phase the energy of the ion beam is adjusted to a radiography energy having a range distal with respect to the target volume wherein the ion beam passes through the target volume; ii) in the at least one deposition phase the energy of the ion beam is adjusted to a deposition energy having a range within the target volume, wherein the ion beam is stopped in the target volume in order to deposit a predetermined dose in the target volume; an ion radiography detector arranged distal with respect to the target volume for acquiring ion radiographs of the target volume by detecting the ion beam that passes through the target volume in the radiography phase, wherein said controller device is configured to control the irradiation system in a manner so that in the at least one deposition phase the intensity of the ion beam is set to be considerably higher than in the at least one radiography phase. - View Dependent Claims (16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27)
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20. An irradiation system for irradiating a target volume with an ion beam, by way of example using a method for irradiating a target volume with an ion beam;
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wherein the irradiation of the target volume is divided over time into at least one radiography phase and at least one deposition phase; wherein the energy of the ion beam is altered over time between the at least one radiography phase and the at least one deposition phase, such that i) in the at least one radiography phase, the range of the ion beam is distal with respect to the target volume, so that the ion beam passes through the target volume, and wherein by means of the ion beam an ion radiograph of the target volume is acquired by detecting the ion beam with an ion radiography detector that is arranged distal with respect to the target volume; and ii) in the at least one deposition phase, the range of the ion beam is within the target volume, so that the ion beam is stopped in the target volume to deposit a predetermined dose in the target volume, wherein they system comprises; a device for compensating the movement of the target volume by active ion beam tracking, wherein the controller device is adapted to control the active ion beam tracking in response to the ion radiographs acquired by the ion radiography detector.
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28. An irradiation system for irradiating a target volume with an ion beam, by way of the example using a method for irradiating a target volume with an ion beam;
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wherein the irradiation of the target volume is divided over time into at least one radiography phase and at least one deposition phase; wherein the energy of the ion beam is altered over time between the at least one radiography phase and the at least one deposition phase, such that i) in the at least one radiography phase, the range of the ion beam is distal with respect to the target volume, so that the ion beam passes through the target volume, and wherein by means of the ion beam an ion radiograph of the target volume is acquired by detecting the ion beam with an ion radiography detector that is arranged distal with respect to the target volume; and ii) in the at least one deposition phase, the range of the ion beam is within the target volume, so that the ion beam is stopped in the target volume to deposit a predetermined dose in the target volume, wherein the irradiation system is configured to irradiate the target volume from more than one direction in the at least one radiography phase to thereby acquire at least one ion radiograph with more than two spatial dimensions.
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Specification