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Noise reduction in tomograms

  • US 10,282,872 B2
  • Filed: 03/24/2015
  • Issued: 05/07/2019
  • Est. Priority Date: 04/08/2014
  • Status: Active Grant
First Claim
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1. A method for reducing noise in a tomogram and/or volume rendering of an object, the method comprising:

  • receiving a plurality of projection image data records afflicted by stray radiation, based on the plurality of projection image data records afflicted by stray radiation, forming;

    (a) at least one tomogram afflicted by stray radiation and having stray radiation artifacts, and(b) at least one preliminary tomogram corrected with respect to stray radiation by a predetermined correction method,using a filter to selectively smooth (a) noise in the at least one tomogram corrected in terms of stray radiation or (b) noise in an artifact map describing the stray radiation artifacts, based on an edge profile of the object imaged in the tomogram afflicted by stray radiation, andsmoothing the noise in the at least one tomogram corrected in terms of stray radiation in a region-specific manner by an adaptive filter in a manner dependent on the edge profile.

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