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System and method for reducing radiation leakage with intensity modulated treatments

  • US 5,847,403 A
  • Filed: 01/07/1997
  • Issued: 12/08/1998
  • Est. Priority Date: 06/30/1995
  • Status: Expired due to Term
First Claim
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1. A method for intensity modulated radiation treatment, comprising the steps of:

  • defining an irregular field on a patient for irradiation;

    providing a beam of radiation, the beam passing through an opening defined by a single jaw and a single collimator section, and the beam treating the irregular field with radiation; and

    moving the single jaw and the single collimator section in one direction, the single jaw and the single collimator section moving at difference speeds to vary the opening for the radiation beam;

    wherein the single jaw and the single collimator section move without rotation to provide intensity modulated radiation treatment to the irregular field;

    whereby radiation leakage is reduced.

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