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Artifact corrections in CBCT of the head. (a) CBCT image reconstructed using FBP without artifact corrections. (b) CBCT image with artifact corrections (scatter and beam hardening, denoted by the superscript SB) showing a strong improvement in image uniformity but an amplification of noise by more than a factor of 2. (c) Flowchart of the artifact correction process and image reconstruction methods (FBP and PWLS) investigated in this work.
