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Device and method for precision macular X-irradiation

  • US 6,134,294 A
  • Filed: 02/13/1998
  • Issued: 10/17/2000
  • Est. Priority Date: 02/13/1998
  • Status: Expired due to Term
First Claim
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1. A device for precision X-irradiation of the macular region of the retina of a patient'"'"'s eye, said device comprisinga mounting plate which is mounted to a linear accelerator collimator;

  • a housing extending from said mounting plate;

    a secondary collimator positioned in said housing;

    an elongate aperture extending through said secondary collimator, said elongate aperture being in linear alignment with an axis of an X-ray beam emanating from the linear accelerator collimator;

    a support member attached to said housing so that said support member extends outwardly from a side of said housing;

    an elongate, hollow, sight tube mounted on said support member so that said sight tube is disposed in a substantially vertical orientation;

    means for aligning a longitudinal axis of said sight tube with respect to the axis of the X-ray beam emanating from the linear accelerator collimator so that the axis of the sight tube and the axis of the X-ray beam intersect each other;

    means for transmitting a light beam down said sight tube substantially along the longitudinal axis of the light tube so that said light beam impinges on a cornea of a patient'"'"'s eye when the patient looks into a bottom end of said light tube and stares directly at a point from which said light beam is being transmitted down said light tube, whereby reflected light is reflected from the cornea of the patient'"'"'s eye and is transmitted up the sight tube so that impingement of the light beam on the cornea can be observed through an upper end of said sight tube; and

    means for positioning the cornea of the patient'"'"'s eye so that the macular region of the retina of the patient'"'"'s eye lies at the intersection of the longitudinal axis of the sight tube and the axis of the X-ray beam.

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