Patent ID: 7912179
Filing Date: 2011-03-22
Classification: A61B,A61N

Abstract:
1. A method of treating an eye with radiotherapy, comprising: emitting a first radiation beam, having a maximal energy, toward a target in an eye from a first x-ray source located within about 50 cm from the target; the first x-ray source having an anode with a cross-section dimension less than about 5.5 mm; the first radiation beam being configured such that a first beamspot at the target in the eye resulting from the first radiation beam emission has a cross-sectional dimension that is no more than about 10% greater than a cross-sectional dimension of a second beamspot at the target; the second beamspot resulting from a second radiation beam, having the same maximal energy as the first radiation beam, emitted from a second x-ray source having a point-source anode; and the second x-ray source being located at the same position relative to the target as the first x-ray source.