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Method and device for the reconstruction of three-dimensional images from cone beam projection data

  • US 6,542,573 B2
  • Filed: 04/04/2002
  • Issued: 04/01/2003
  • Est. Priority Date: 04/04/2001
  • Status: Expired due to Fees
First Claim
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1. A method of reconstructing three-dimensional images from cone beam projection data of an object to be examined which is arranged in an examination zone, which method includes the steps of:

  • (a) acquiring the cone beam projection data by means of an X-ray device which includes an X-ray source and an X-ray detector, the X-ray source being moved along a trajectory around the examination zone in order to acquire the projection data, (b) determining the contour of the sensitive detector surface of the X-ray detector on which the projection data was acquired, (c) determining pseudo-projection data in an overall outer zone, enclosing the sensitive detector surface in an annular fashion, from the projection data determined, and (d) reconstructing a three-dimensional image of the examination zone from the projection data acquired on the sensitive detector surface and from the pseudo-projection data determined in the outer zone.

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