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Orthovoltage radiosurgery

  • US 8,184,772 B2
  • Filed: 05/31/2011
  • Issued: 05/22/2012
  • Est. Priority Date: 04/09/2007
  • Status: Active Grant
First Claim
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1. A method of treating tissue at a target zone deep to a surface of a patient'"'"'s body by emitting, from an x-ray source having a system axis defined in a global coordinate system, a collimated x-ray beam having a beam axis defined in the global coordinate system, said method comprising:

  • (a) determining a reference axis defined relative to the patient'"'"'s body, the reference axis being in the global coordinate system;

    (b) determining a treatment axis that intersects the target zone, the treatment axis being in the global coordinate system;

    (c) positioning the x-ray source at a first position with respect to the system axis, such that the beam axis intersects the treatment axis at a first treatment site within the target zone and such that the beam axis intersects the surface of the patient'"'"'s body at a first location;

    (d) emitting an x-ray beam toward the target zone along the beam axis, to irradiate the target zone with a first radiation dose;

    (e) rotating the x-ray source about the system axis to a second position with respect to the system axis, such that the beam axis intersects the treatment axis at a second treatment site within the target zone and such that the beam axis intersects the surface of the patient'"'"'s body at a second location that is separated from the first location by a first distance; and

    (f) emitting an x-ray beam toward the target zone along the beam axis, to irradiate the target zone with a second radiation dose.

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