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Fig. 4 —Side-by-side comparison of gated and ungated images. Left column
contains ungated images and right column contains ECG-gated images. Top row is
comparison of two patients (35-year-old man with ascending aortic aneurysm and
63-year-old woman with aortic aneurysm). Bottom row is of single patient
(21-year-old woman with aneurysm and focal narrowing). Emphasis should be
placed on observing blurring that is present in ungated scans (left
column) and absent in gated scans (right column), particularly
at root of aorta and ascending aorta. Both ungated images show large amount of
blurring at root of aorta.
