Method and device for delivering radiotherapy
First Claim
1. A method of reproducibly interfacing a patient with a radiation delivery device, the method comprising:
- placing the patient on a patient positioner in a reproducible manner;
fixing and attaching the patient to the patient positioner so that the patient and the patient positioner move together as a single unit in a controlled fashion;
providing a desired orientation and location of a radiation dose based at least in part on the location, orientation, and shape of a treatment area of the patient;
determining the location of the treatment area of the patient relative to a virtual isocenter of a diagnostic, simulation or treatment unit, comprising the steps of;
placing the patient positioner such that the treatment area of the patient is within a few centimeters of the virtual isocenter;
creating a first localization image with an imaging device;
creating a second localization image with an imaging device, where the second localization image is taken from an angle which is approximately orthogonal to the angle of the first localization image;
determining a current orientation and location of the treatment area with respect to the virtual isocenter using at least the first and second localization images; and
computing a discrepancy between the current orientation and location of the treatment area with respect to the virtual isocenter and the desired orientation and location of the radiation dose;
accounting for the computed discrepancy to move the patient positioner with respect to the virtual isocenter in order to place the patient according to the desired orientation and location of a radiation dose; and
verifying the position of the patient positioner such that that the treatment area of the patient is positioned with respect to the virtual isocenter according to the desired orientation and location of a radiation dose.
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Accused Products
Abstract
A device 10 for aligning a patient for delivering a plurality of radiation beams comprising a patient support surface 12, a coarse alignment subsystem 14 connected to the patient support surface, and a fine alignment subsystem connected to the patient support surface 16. A method of aligning a patient for delivering a plurality of radiation beams from a plurality of device positions comprising compensating for flexion of a radiation beam delivery device within a gantry during movement of the radiation beam delivery device from a first device position to a second device position by using a set of predetermined data describing the flexion behavior of the radiation beam delivery device so that the target tissue within the patient is placed at the beamline center for the radiation beam delivery device at the second device position.
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Citations
20 Claims
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1. A method of reproducibly interfacing a patient with a radiation delivery device, the method comprising:
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placing the patient on a patient positioner in a reproducible manner; fixing and attaching the patient to the patient positioner so that the patient and the patient positioner move together as a single unit in a controlled fashion; providing a desired orientation and location of a radiation dose based at least in part on the location, orientation, and shape of a treatment area of the patient; determining the location of the treatment area of the patient relative to a virtual isocenter of a diagnostic, simulation or treatment unit, comprising the steps of; placing the patient positioner such that the treatment area of the patient is within a few centimeters of the virtual isocenter; creating a first localization image with an imaging device; creating a second localization image with an imaging device, where the second localization image is taken from an angle which is approximately orthogonal to the angle of the first localization image; determining a current orientation and location of the treatment area with respect to the virtual isocenter using at least the first and second localization images; and computing a discrepancy between the current orientation and location of the treatment area with respect to the virtual isocenter and the desired orientation and location of the radiation dose; accounting for the computed discrepancy to move the patient positioner with respect to the virtual isocenter in order to place the patient according to the desired orientation and location of a radiation dose; and verifying the position of the patient positioner such that that the treatment area of the patient is positioned with respect to the virtual isocenter according to the desired orientation and location of a radiation dose. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A patient alignment device for delivering multiple beams of radiation, the device allowing for more efficient alignment of the patient than conventional methods, the patient alignment device comprising:
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a two-stage patient positioner, the two-stage patient positioner comprising; a first stage comprising a coarse alignment subsystem capable of providing large traversals or rotations within a treatment room to place a patient near a radiation beam treatment location; a second stage comprising a fine alignment subsystem to correct initial miss-alignments near the radiation beam treatment location, provide proper orientation, and/or to compensate for deflections in a radiation beam delivery apparatus when multiple field directions are applied; and the two-stage patient positioner configured to reproducibly position a patient with at least six degrees of freedom, including perpendicular translation motions including longitudinal, lateral, and vertical, and rotational motions including roll, pitch, and yaw, the two-stage patient positioner thereby configured to compensate for rotational misalignments around one or more axes without requiring the patient to be re-registered to the patient positioner. - View Dependent Claims (11, 12, 13)
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14. A patient alignment device for delivering multiple beams of radiation, the device allowing for more efficient alignment of the patient than conventional methods, the patient alignment device comprising:
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a multiple-stage patient positioner configured to reproducibly immobilize a patient so that the patient and the multiple-stage patient positioner move together as a single unit in a controlled fashion; the multiple-stage patient positioner configured to reproducibly position a patient with at least six degrees of freedom, including perpendicular translation motions including longitudinal, lateral, and vertical, and rotational motions including roll, pitch, and yaw, the multiple-stage patient positioner thereby configured to compensate for a deflection of a radiation delivery device in order to align the patient more quickly and accurately. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification