Motion artifact simulating the appearance of dissection. Postcontrast image through the ascending aorta reveals an irregular line extending across the aorta (curved arrow), simulating aortic dissection. This line was not seen on images immediately above and below this level (not shown). Motion artifacts are most prevalent and severe near the base of the heart. They may be recognized by their non-anatomic configuration and their inconstant appearance on sequential images.Monday, April 20, 2009
MISREGISTRATION ARTIFACTS
Motion artifact simulating the appearance of dissection. Postcontrast image through the ascending aorta reveals an irregular line extending across the aorta (curved arrow), simulating aortic dissection. This line was not seen on images immediately above and below this level (not shown). Motion artifacts are most prevalent and severe near the base of the heart. They may be recognized by their non-anatomic configuration and their inconstant appearance on sequential images.
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