Pulsation-related motion artifact of the external iliac artery mimicking localized dissection: An unexpected finding.

ABSTRACT: Contrast-enhanced CT is widely used for the evaluation of acute aortic dissection, but non-ECG-gated studies may still be affected by motion artifacts that mimic true vascular pathology. We report a woman in her forties who presented with right back pain. Non-ECG-gated contrast-enhanced CT demonstrated a discontinuous linear finding in the right external iliac artery, suggestive of a localized dissection. Follow-up CT performed 3 weeks later showed a similar appearance. Cine MRI subsequently revealed marked pulsatile motion of the right external iliac artery with approximately 6-mm displacement, resulting in compression and deformation of the adjacent external iliac vein. These findings confirmed that the CT abnormality represented a pulsation-induced motion artifact rather than true disse

SUBMITTER: Miyara K 

PROVIDER: S-EPMC12925113 | biostudies-literature | 2026 May

REPOSITORIES: biostudies-literature