CT artifacts
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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 artefact) 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
-
beam hardening
- cupping artifact
- streak and darks bands
- metal artifact/high-density foreign material artifact
- partial volume averaging
- quantum mottle (noise)
- photon starvation
- aliasing in CT
Hardware-based artifacts
Helical and multichannel artifacts
- windmill artifact
- cone beam effect
-
MPR artifact
- zebra artifact
- stair step artifact
See also
-<li><a href="/articles/motion-artifact">motion artifact</a></li>- +<li><a href="/articles/motion-artifact-2">motion artifact</a></li>
-<a title="Beam hardening" href="/articles/beam-hardening">beam hardening</a> <ul>- +<a href="/articles/beam-hardening">beam hardening</a> <ul>
-<li><a href="/articles/aliasing-in-ct">aliasing in CT</a></li>- +<li><a title="Aliasing (CT)" href="/articles/aliasing-ct">aliasing in CT</a></li>
-</ul><h4>See also</h4><ul><li><a href="/articles/mri-artifacts">MRI artifacts</a></li></ul>- +</ul><h4>See also</h4><ul><li><a href="/articles/mri-artifacts-1">MRI artifacts</a></li></ul>