| 摘要 |
PROBLEM TO BE SOLVED: To reduce artifacts in computed tomography image reconstruction.SOLUTION: The method comprises: obtaining an original reconstructed image and an original sonogram and determining a proportion of metal pixels in the original reconstructed image; and if the proportion of metal pixels is greater than a first threshold value, then generating an expanded metal template based on the original reconstructed image, generating a metal-free, metal artifact reduced (MAR) image based on the expanded metal template and the original sinogram, and generating a final image based on the expanded metal template and the metal-free, metal artifact reduced image; but, if the proportion of metal pixels is less than a second threshold value, then generating an expanded metal template based on the original reconstructed image, generating a metal-free, metal artifact reduced image based on a treatment including weighting of the expanded metal template and the original sinogram, and generating a final image based on the expanded metal template and the metal-free, metal artifact reduced image. |
