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METHOD AND APPARATUS FOR REDUCTION OF METAL ARTIFACTS IN CT IMAGES

  • US 20110081071A1
  • Filed: 10/06/2009
  • Published: 04/07/2011
  • Est. Priority Date: 10/06/2009
  • Status: Active Grant
First Claim
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1. A computer readable storage medium having stored thereon a computer program comprising instructions, which, when executed by a computer, cause the computer to:

  • acquire a first view dataset based on x-rays received by a detector corresponding to a first energy level;

    reconstruct an initial image using the first view dataset, the initial image comprising a plurality of metal voxels at respective metal voxel locations;

    generate a metal mask corresponding to the plurality of metal voxels within the initial image;

    forward project the metal mask onto the first view dataset to identify metal dexels in the first view dataset;

    perform a weighted interpolation based on the identified metal dexels to generate a completed first view dataset;

    reconstruct a first final image using the completed first view dataset, the first final image comprising a plurality of image voxels corresponding to the metal voxel locations; and

    replace a portion of the plurality of image voxels corresponding to the metal voxel locations with smoothed metal values.

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