Patent ID: 8855267
Filing Date: 2014-10-07
Classification: A61B,A61N

Abstract:
1. A system for treating an eye with radiotherapy, comprising: an x-ray emitter comprising an anode with a non-zero size, the x-ray emitter being configured to emit a first x-ray beam from a first position toward a target in the eye, the first position being within about 50 cm of the target and spaced away from the eye, and the first x-ray beam having a maximal energy of less than about 500 keV; a collimator configured to collimate the first x-ray beam such that a first beamspot at the target in the eye resulting from emission of the first x-ray beam has a cross-sectional dimension that is no more than about 10% greater than a cross-sectional dimension of a second, theoretical beamspot at the target, the second, theoretical beamspot resulting from a second, theoretical x-ray beam, having the same maximal energy as the first x-ray beam, emitted from a second, theoretical x-ray emitter, at the first position, having an idealized point-source anode; and an ocular stabilizing device configured to (i) be applied to the eye, (ii) limit or prevent eye movement during a selected treatment interval, and (iii) move the eye relative to the first x-ray beam.