Adaptive aperture
First Claim
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1. A particle therapy system comprising:
- a particle accelerator to output a particle beam;
at least one scanning magnet to move the particle beam relative to at least part of an irradiation target in a patient;
a device that is between the particle accelerator and the patient, the device comprising multiple leaves that are configurable to define an edge of the device, the multiple leaves being dynamically reconfigurable during movement of the particle beam within a beam field of the scanning magnet to change a shape of the edge, the edge being movable between at least a portion of the particle beam and the patient so that a first part of the particle beam on a first side of the edge is at least partly blocked by the multiple leaves and so that a second part of the particle beam on a second side of the edge is allowed to pass to the irradiation target; and
one or more processing devices to receive information about a fixed aperture from a treatment planning system and to translate the information about the fixed aperture to different configurations of the multiple leaves to define at least one edge of the device that mimics at least part of the fixed aperture during movement of the particle beam within the beam field.
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Abstract
An example particle therapy system includes a particle accelerator to output a particle beam having a spot size; a scanning system for the particle accelerator to scan the particle beam in two dimensions across at least part of a treatment area of an irradiation target; and an adaptive aperture between the scanning system and the irradiation target. The adaptive aperture includes structures that are movable relative to the irradiation target to approximate a shape to trim part of the treatment area. The part of the treatment area has a size that is based on an area of the spot size.
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Citations
20 Claims
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1. A particle therapy system comprising:
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a particle accelerator to output a particle beam; at least one scanning magnet to move the particle beam relative to at least part of an irradiation target in a patient; a device that is between the particle accelerator and the patient, the device comprising multiple leaves that are configurable to define an edge of the device, the multiple leaves being dynamically reconfigurable during movement of the particle beam within a beam field of the scanning magnet to change a shape of the edge, the edge being movable between at least a portion of the particle beam and the patient so that a first part of the particle beam on a first side of the edge is at least partly blocked by the multiple leaves and so that a second part of the particle beam on a second side of the edge is allowed to pass to the irradiation target; and one or more processing devices to receive information about a fixed aperture from a treatment planning system and to translate the information about the fixed aperture to different configurations of the multiple leaves to define at least one edge of the device that mimics at least part of the fixed aperture during movement of the particle beam within the beam field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 17, 18, 19, 20)
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8. A particle therapy system comprising:
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a device to configure an opening through which at least part of a particle beam passes to an irradiation target in a patient, the device comprising; a first carriage that is movable in a first dimension; second carriages that are coupled to the first carriage and therefore movable in the first dimension along with the first carriage, each of the second carriages being configured also to move in a second dimension that is different from the first dimension, each of the second carriages comprising; multiple leaves comprised of material that blocks passage of the particle beam, the multiple leaves being configurable to define an edge that is movable into a path of the particle beam such that a first part of the particle beam on a first side of the edge is blocked by the multiple leaves and such that a second part of the particle beam on a second side of the edge is not blocked by the multiple leaves, the edge defining at least part of the opening, the multiple leaves being dynamically reconfigurable during movement of the particle beam within a beam field of a scanning magnet to change a shape of the edge based on motion of the particle beam; and one or more processing devices to receive information about a fixed aperture from a treatment planning system and to translate the information about the fixed aperture to configurations of the multiple leaves to define at least one edge of the device that mimics at least part of the fixed aperture as the particle beam is moved within the beam field. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification