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3D reconstruction of CT image and measurement of beam-hardening metal artifact. 3D reconstruction image of a 56-year-old male with bilateral hip prostheses in 2 years’ follow-up (A) and (B); 3D reconstruction image of a female with bilateral knee prostheses in 1-wk postoperative examination (C) and (D). (A and C) Non-O-Mar image; (B and D) O-Mar image. The redundant section of 3D-model was B-H metal artifact.
