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Orthovoltage radiosurgery

  • US 8,855,267 B2
  • Filed: 05/13/2013
  • Issued: 10/07/2014
  • Est. Priority Date: 10/16/2006
  • Status: Active Grant
First Claim
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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.

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