Method of providing rotational radiation therapy using particles
AssigneeElekta Limited
InventorStuart Julian Swerdloff
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Abstract
Techniques are described herein for delivering a particle beam composed of a plurality of beamlets from a continuously rotating gantry towards a target, by determining a plurality of predefined spots on the target and configuring them into a set of smaller spots on the outside of the target and a set of larger spots on the inside of the target, optimizing the delivery of the rotating particle beam such that the inside edge and the outside edge of the arc of the rotating beam are delivered to the spots located at the center of the target, and the central component of the arc of the beam is delivered to the spots located at the outside of the target.
Claims34
A method of delivering a plurality of particle beams from a continuously rotating gantry towards a target, the method comprising:
- continuously delivering successive particle beams of the plurality of particle beams as the gantry rotates, wherein each particle beam of the successive particle beams has an associated arc, with a center of the associated arc corresponding to a particular gantry angle for each particle beam;
- for a respective particle beam of the successive particle beams, delivering a plurality of beamlets from a beginning of a respective arc to an end of the respective arc;
- for a respective gantry angle, determining a plurality of predefined spots in the target for the respective gantry angle, wherein the plurality of predefined spots are configured in a spiral pattern;
- ordering the plurality of predefined spots in the spiral pattern from those closest to an isocentric axis for the respective gantry angle to those most distant from the isocentric axis;
- and
- wherein delivering the successive particle beams includes delivering the plurality of beamlets for the respective particle beam according to the spiral pattern of the plurality of predefined spots.
A non-transitory machine-readable medium including instructions for delivering a plurality of particle beams from a continuously rotating gantry towards a target, which when executed by a processor, cause the processor to:
- determine a plurality of spots in the target for a gantry angle, wherein the plurality of spots are configured in a spiral pattern;
- order the plurality of spots in the spiral pattern from those closest to an isocentric axis for the gantry angle to those most distant from the isocentric axis;
- and
- continuously deliver the plurality of particle beams as the gantry rotates by delivering a plurality of beamlets for each particle beam of the plurality of particle beams from a beginning of a respective arc to an end of the respective arc according to the spiral pattern of the plurality of spots, wherein a center of the respective arc corresponds to a particular gantry angle for a respective particle beam.
A system for delivering a plurality of particle beams from a continuously rotating gantry towards a target, the system comprising:
- an ion source configured to provide a stream of particles to an injector, the injector configured to accelerate the stream of particles;
- an accelerator configured to further accelerate the stream of particles and provide energy to the stream of particles, the energy corresponding to a delivery depth within tissue;
- an energy selector configured to select energies of the stream of particles to be delivered;
- a plurality of bending magnets configured to transport the stream of particles into a radiation therapy delivery room;
- a plurality of scanning magnets configured to shape the stream of particles according to a target;
- a snout configured to:
- continuously deliver successive particle beams of the stream of particles as the gantry rotates, wherein each particle beam of the successive particle beams has an associated arc, with a center of the associated arc corresponding to a particular gantry angle for each particle beam;
- for a respective particle beam of the successive particle beams, deliver a plurality of beamlets from a beginning of a respective arc to an end of the respective arc;
- and
- a processor configured to:
- for a respective gantry angle, determine a plurality of predefined spots in the target for the respective gantry angle, wherein the plurality of predefined spots are configured in a spiral pattern;
- order the plurality of predefined spots in the spiral pattern from those closest to an isocentric axis for the respective gantry angle to those most distant from the isocentric axis;
- and
- wherein delivery of the successive particle beams includes delivery of the plurality of beamlets for the respective particle beam according to the spiral pattern of the plurality of predefined spots.
Dependencies are inferred from the claim text.