ISSN 1004-4140
CN 11-3017/P
Volume 31 Issue 6
Nov.  2022
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Abstract
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LI Q X, JIN K, PANG Z F. A variational model for removing concentric elliptical artifacts from CT images[J]. CT Theory and Applications, 2022, 31(6): 773-781. DOI: 10.15953/j.ctta.2022.085. (in Chinese).
Citation: LI Q X, JIN K, PANG Z F. A variational model for removing concentric elliptical artifacts from CT images[J]. CT Theory and Applications, 2022, 31(6): 773-781. DOI: 10.15953/j.ctta.2022.085. (in Chinese).
shu

A Variational Model for Removing Concentric Elliptical Artifacts from CT Images

  • 1.

    Henan University, Kaifeng 475004, China School of Mathematics and Statistics

  • 2.

    Henan University, Kaifeng 475004, China School of Computer and Information Engineering

More Information
  • Received Date: May 08, 2022
  • Revised Date: May 24, 2022
  • Accepted Date: June 10, 2022
  • Available Online: June 26, 2022
  • Published Date: November 02, 2022
    Graphical Abstract
    • Abstract
  • In computed tomography (CT) imaging, artifacts will degrade the quality of reconstructed images. To solve this issue, in this paper we propose a method to remove concentric elliptical artifacts from CT images. This method is based on the idea of Directional total variation (DTV), which models the problem of elliptical artifact removal as an energy minimization problem, and establishes a variation-based model which is adapted the elliptical artifacts by analyzing the edge features of elliptical artifacts. Since the proposed model is a non-smooth convex optimization problem with a divisible structure, the alternating direction multiplier method (ADMM) is applied. Finally, the effectiveness of the model in removing elliptical artifacts is verified by simulation experiments.
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    • References (19)
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