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Results of artifact-corrected image in sparse-view CT by AE, U-Net, and CGAN. (a–d) Representative axial slice images with dispersed projection angles of 1°, 2°, 5°, and 10°. Subtraction image, created by subtracting the artifact-corrected image from the original image, is shown at the bottom of each dispersed projection image. All images are shown with the same window width and levels.
