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Method for the reconstruction of sectional images from detector measurement data of a tomography device

  • US 20060013355A1
  • Filed: 07/15/2005
  • Published: 01/19/2006
  • Est. Priority Date: 07/16/2004
  • Status: Abandoned Application
First Claim
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1. A method for use in the reconstruction of sectional images from detector measurement data of a tomography device, the device including, at least one radiation source, movable about a system axis, and at least one detector lying opposite and having at least one detector row and in each case a multiplicity of detector elements, to measure the absorption of the radiation emerging from the radiation source after penetrating an examination object, at least the radiation source with its focus being rotatable on an imaginary cylinder around the examination object and a system axis as axis of rotation, in the process scanning the examination object, lying in a scanning volume formed by the beams, via the beams and, per detector row, recording a sinogram including a multiplicity of partial sinograms corresponding to the number of detector elements which are respectively assigned to a detector element of a detector row, the method comprising:

  • dividing the scanning beam into a multiplicity of partial volumes;

    determining a reference volume, for each partial volume, which intersects the partial volume and which is at the greatest distance from the system axis, and calculating the absorption coefficients of each partial volume exclusively with absorption values that originate from beams whose distance is greater than or equal to the distance between the reference beam and the system axis.

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