Ocular radiosurgery
First Claim
1. A method, of planning radiation therapy for an eye, comprising:
- preparing a treatment plan for delivery of radiation to a target at a region of the eye, the preparing comprising;
determining a first dose of radiation to be delivered from a radiation source outside the eye to the target;
determining at least one of a width of at least one x-ray radiation beam and a distance from the radiation source to the target, anddetermining a trajectory of the x-ray beam; and
wherein the at least one of the width of the at least one x-ray radiation beam, the distance from the radiation source to the target, and the trajectory of the beam is selected such that an amount of radiation to be received outside the target from the radiation source is equal to or less than about 40 percent of the first dose;
wherein determining the trajectory of the beam is based on at least a point on the retina and a point on an outer surface of the eye, andoutputting information, to an output module, indicative of at least one of the width of the at least one x-ray radiation beam, the distance from the radiation source to the target, and the trajectory of the beam; and
wherein the x-ray beam has a maximum energy of less than about 400 keV.
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Accused Products
Abstract
A radiosurgery system is described that delivers a therapeutic dose of radiation to a target structure in a patient. In some embodiments, inflammatory ocular disorders are treated, specifically macular degeneration. In some embodiments, ocular structures are placed in a global coordinate system, based on ocular imaging, which leads to direction of an automated positioning system. In some embodiments, the position of an ocular structure is tracked and related to a radiosurgery system. In some embodiments, a treatment plan is utilized for a specific disease to be treated and/or structures to be avoided. In some embodiments, a fiducial aids in positioning the system. In some embodiments, a reflection off the eye is used to aid in positioning. In some embodiments, radiodynamic therapy is described in which radiosurgery is used in combination with other treatments and can be delivered concomitant with, prior to, or following other treatments.
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Citations
29 Claims
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1. A method, of planning radiation therapy for an eye, comprising:
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preparing a treatment plan for delivery of radiation to a target at a region of the eye, the preparing comprising; determining a first dose of radiation to be delivered from a radiation source outside the eye to the target; determining at least one of a width of at least one x-ray radiation beam and a distance from the radiation source to the target, and determining a trajectory of the x-ray beam; and wherein the at least one of the width of the at least one x-ray radiation beam, the distance from the radiation source to the target, and the trajectory of the beam is selected such that an amount of radiation to be received outside the target from the radiation source is equal to or less than about 40 percent of the first dose; wherein determining the trajectory of the beam is based on at least a point on the retina and a point on an outer surface of the eye, and outputting information, to an output module, indicative of at least one of the width of the at least one x-ray radiation beam, the distance from the radiation source to the target, and the trajectory of the beam; and wherein the x-ray beam has a maximum energy of less than about 400 keV. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method, of planning radiation therapy for an eye, comprising:
preparing a treatment plan for a delivery of radiation to a target at a region of the eye from at least one x-ray radiation beam, the preparing comprising; determining a first dose of radiation to be delivered from a radiation source outside the eye to the target; determining at least one of a width of the at least one x-ray radiation beam, a distance from the radiation source to the target, and determining a trajectory of the beam; and wherein the at least one of the width of the at least one x-ray radiation beam, the distance from the radiation source to the target, and the trajectory of the beam is selected to effect delivery of the first dose to the target such that a second dose of radiation, to be received from the radiation source at other eye tissue located less than about 6 mm from a center of the target, is equal to or less than about 40 percent of the first dose, wherein determining the trajectory of the beam is based on at least a point on the retina and a point on an outer surface of the eye; and outputting information, to an output module, indicative of at least one of the width of the at least one x-ray radiation beam, the distance from the radiation source to the target, and the trajectory of the beam. - View Dependent Claims (25, 26, 27, 28, 29)
Specification