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Reconstruction of images from three-dimensional cone beam data

  • US 6,219,441 B1
  • Filed: 06/22/1993
  • Issued: 04/17/2001
  • Est. Priority Date: 06/22/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A computed tomography imaging system which comprises:

  • a two-dimensional array of detector elements for receiving photons emanating in a cone beam from a source;

    a digital acquisition system for acquiring two-dimensional arrays of cone beam data from the array of detector elements at a series of views in which the array of detector elements revolves around a central axis;

    a filter for receiving the cone beam data and filtering the same;

    means for back projecting the filtered cone beam data to produce image data fd({right arrow over (r)});

    means for receiving the cone beam data and producing from the received cone beam data estimated cone beam values not provided by the received cone beam data;

    means for receiving the estimated cone beam values and calculating from the estimated cone beam values corrected image data fC({right arrow over (r)}); and

    summing means for combining the image data fD({right arrow over (r)}) with the corrected image data fC({right arrow over (r)}) to produce an image slice.

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