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ZHOU Yi-chao, XIE Ming-yuan, YANG Ling.et al. Fast Removal of CT Ring Artifacts[J]. Journal of Sichuan University (Medical Sciences), 2016, 47(3): 420-424.
Citation: ZHOU Yi-chao, XIE Ming-yuan, YANG Ling.et al. Fast Removal of CT Ring Artifacts[J]. Journal of Sichuan University (Medical Sciences), 2016, 47(3): 420-424.

Fast Removal of CT Ring Artifacts

  • 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. Conclusion The method described in this study can overcome disadvantages of existing methods and obtain good results.
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