Patent ID: 7978818

Claim:
A system, for treating a target tissue of an eye with x-ray radiation, comprising: a radiation source that emits x-rays, the x-rays having an energy between about 1 KeV and about 500 KeV; a collimator that collimates the emitted x-rays into an x-ray beam, the x-ray beam having a dose distribution at a beam spot in a plane at the target tissue of the eye, such that the x-ray beam has a penumbra at the target tissue of less than about 20 percent; an alignment system that aligns the x-ray beam with an axis traversing the target tissue and that positions the radiation source within about 50 cm from the target tissue; and a processing module that receives an input comprising a parameter of the target tissue and that, based on the parameter, outputs to the alignment system a direction for the x-ray beam to be emitted toward the target tissue; wherein the parameter comprises a location of a fiducial marker that provides indication of a location of the target tissue; and wherein the fiducial marker comprises a component of a holder that stabilizes the eye during emission of the x-ray beam.