X-ray computed tomography (CT) system for detecting thin objects

  • US 5,905,806 A
  • Filed: 05/12/1997
  • Issued: 05/18/1999
  • Est. Priority Date: 10/20/1994
  • Status: Expired due to Term
First Claim
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1. A method of detecting an explosive comprising the steps of:

  • (a) scanning a three-dimensional volume to determine the density of each of a plurality of voxels representing the three-dimensional volume;

    (b) connecting and labeling voxels of the plurality of voxels which have similar densities using an evaluation process wherein, for a given voxel, voxels in the same plane as the given voxel, and in planes above and below the given voxel, are compared to said given voxel for contiguity;

    (c) determining at least one of the volume and the mass of each contiguous region of voxels having similar densities; and

    (d) comparing at least one of the volume and the mass of each contiguous region having similar densities to at least one threshold and identifying each region which exceeds a threshold as a region potentially containing an explosive.

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