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Leaf sequencing algorithm for moving targets

  • US 7,796,731 B2
  • Filed: 08/22/2008
  • Issued: 09/14/2010
  • Est. Priority Date: 08/22/2008
  • Status: Active Grant
First Claim
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1. A method of providing intensity modulated radiation therapy to a target using a multileaf collimator (MLC), wherein the target comprises a region that moves periodically along a trajectory, comprising:

  • determining the trajectory of the moving target region;

    determining a line segment that at least approximately matches said trajectory;

    orienting the MLC such that all of the leaves of the MLC are perpendicular to said line segment;

    delivering therapeutic radiation through an aperture in said MLC, wherein each of said aperture and said target are in a first position; and

    delivering therapeutic radiation through an aperture in said MLC, wherein each of said aperture and said target are in a second position.

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