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.
