title: [Fast Removal of CT Ring Artifacts].
abstract: OBJECTIVE
  To explore how to remove CT ring-shaped artifact quickly and effectively, and to improve accuracy of CT reconstruction image.
  
  
  METHODS
  CT graphics (including the ring-shaped artifacts) were used first in coordinate transformation with a new transformation method. A two-dimensional filter was designed to filter the image. Then, a one-dimensional filter was used to re-filter the image. Finally, a new transform method was used to restore the image.
  
  
  RESULTS
  The two-step coordinate transformation of ring-shaped artifact algorithm resulted in accurate restored original CT image, effectively reducing its interference on useful information.
  
  
  CONCLUSIONS
  The method described in this study can overcome disadvantages of existing methods and obtain good results.
authors.forename: Yi-chao
authors.initials: YC
authors.lastname: Zhou
authors.forename: Ming-yuan
authors.initials: MY
authors.lastname: Xie
authors.forename: Ling
authors.initials: L
authors.lastname: Yang
authors.forename: Fu-xiang
authors.initials: FX
authors.lastname: Liu
mesh_terms: D000465:Algorithms; D016477:Artifacts; D007091:Image Processing, Computer-Assisted; D014057:Tomography, X-Ray Computed