CTICasesSiemens IMAR Artifact
Imaging findings
A filling defect within the inflow cannula of a left ventricular assist device (LVAD) was initially suspected. Comparative imaging without the Metal Artifact Reduction (IMAR) algorithm revealed the finding was purely an artifact.
Key takeaways
Be aware that metal artifact reduction algorithms can sometimes create or simulate artifacts (like filling defects) that may be mistaken for pathology, such as pulmonary emboli, in patients with metallic implants (e.g., AICDs, fusion hardware).
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