CT artifacts

Last revised by Assoc Prof Craig Hacking on 01 Sep 2021

CT artifacts are common and can occur for various reasons. Knowledge of these artifacts is important because they can mimic pathology (e.g. partial volume artifact) or can degrade image quality to non-diagnostic levels. 

CT artifacts can be classified according to the underlying cause of the artifact. 

Patient-based artifacts
Physics-based artifacts
Hardware-based artifacts

See also

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Cases and figures

  • Case 1: motion artifact
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  • Case 2: ring artifact
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  • Case 3: motion and beam-hardening
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  • Case 5: motion artifact mimicking SDH
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  • Case 6: streak artifacts
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  • Case 7: partial ring artifact
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  • Case 8: incomplete projection
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  • Case 9: beam hardening and ring artifacts
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