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Development of a non-linear weighted hybrid cone-beam CT reconstruction for circular trajectories

Authors
Journal
Computerized Medical Imaging and Graphics
0895-6111
Publisher
Elsevier
Publication Date
Volume
31
Issue
7
Identifiers
DOI: 10.1016/j.compmedimag.2007.06.006
Keywords
  • Computed Tomography
  • Cone-Beam Ct
  • Computer Simulation
  • Ct Imaging
  • Artifacts
Disciplines
  • Computer Science

Abstract

Abstract We investigated an image reconstruction algorithm to reduce cone-beam artifacts in cone-beam CT. Our new algorithm to reduce such artifacts features: (1) a change in weighting with respect to projection data obtained at different projection angles; (2) distribution of correction coefficients so that they are larger near the center of the detector, while taking individual channel data for the detector into account, and smaller near the edges; (3) three-dimensional back-projection of corrected projection data. These findings confirmed that this algorithm reduces cone-beam artifacts and generates high-quality reconstruction images.

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