Methods and apparatus for the planning and delivery of radiation treatments
First Claim
1. A method for delivering radiation dose to a target area within a subject, the method comprising:
- defining a trajectory comprising relative movement between a treatment radiation source and the subject;
determining a radiation delivery plan;
effecting continuous relative movement between the treatment radiation source and the subject along the trajectory and, during the continuous relative movement between the treatment radiation source and the subject along the trajectory, delivering a treatment radiation beam from the treatment radiation source to the subject according to the radiation delivery plan to impart a dose distribution on the subject;
wherein effecting continuous relative movement between the treatment radiation source and the subject along the trajectory comprises effecting movement of both the radiation source and the subject.
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Accused Products
Abstract
Methods and apparatus are provided for planning and delivering radiation treatments by modalities which involve moving a radiation source along a trajectory relative to a subject while delivering radiation to the subject. In some embodiments the radiation source is moved continuously along the trajectory while in some embodiments the radiation source is moved intermittently. Some embodiments involve the optimization of the radiation delivery plan to meet various optimization goals while meeting a number of constraints. For each of a number of control points along a trajectory, a radiation delivery plan may comprise: a set of motion axes parameters, a set of beam shape parameters and a beam intensity.
233 Citations
19 Claims
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1. A method for delivering radiation dose to a target area within a subject, the method comprising:
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defining a trajectory comprising relative movement between a treatment radiation source and the subject; determining a radiation delivery plan; effecting continuous relative movement between the treatment radiation source and the subject along the trajectory and, during the continuous relative movement between the treatment radiation source and the subject along the trajectory, delivering a treatment radiation beam from the treatment radiation source to the subject according to the radiation delivery plan to impart a dose distribution on the subject; wherein effecting continuous relative movement between the treatment radiation source and the subject along the trajectory comprises effecting movement of both the radiation source and the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for delivering radiation dose to a target area within a subject, the method comprising:
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defining a trajectory comprising relative movement between a treatment radiation source and the subject; determining a radiation delivery plan; effecting relative movement between the treatment radiation source and the subject along the trajectory and, during the relative movement between the treatment radiation source and the subject along the trajectory, delivering a treatment radiation beam from the treatment radiation source to the subject according to the radiation delivery plan to impart a dose distribution on the subject; wherein delivering the treatment radiation beam from the treatment radiation source to the subject comprises varying an intensity of the treatment radiation beam over at least a portion of the trajectory and wherein varying the intensity of the treatment radiation beam over at least a portion of the trajectory comprises varying a radiation output rate of the treatment radiation source in accordance with the radiation delivery plan during the relative movement between the treatment radiation source and the subject along the trajectory. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for delivering radiation dose to a target area within a subject, the method comprising:
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defining a set of one or more optimization goals, the set of one or more optimization goals comprising a desired dose distribution in the subject; defining an initial trajectory for relative movement between a radiation source and the subject and an initial plurality of control points along the initial trajectory; iteratively optimizing a simulated dose distribution relative to the set of one or more optimization goals to determine one or more radiation delivery parameters associated with each of the control points; wherein the one or more radiation delivery parameters comprise a position of the radiation source relative to the subject and wherein iteratively optimizing the simulated dose distribution comprises defining an optimized trajectory fox′
relative movement between the radiation source and the subject based on the one or more radiation delivery parameters; andeffecting relative movement between the treatment radiation source and the subject along the optimized trajectory and, during the relative movement between the treatment radiation source and the subject along the optimized trajectory, delivering a treatment radiation beam from the treatment radiation source to the subject according to the determined radiation delivery to impart a dose distribution on the subject. - View Dependent Claims (17, 18, 19)
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Specification