Patent ID: 7680244

Claim:
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, 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.