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Insights into Imaging
Fig. 1 | Insights into Imaging

Fig. 1

From: A pictorial review of acute aortic syndrome: discriminating and overlapping features as revealed by ECG-gated multidetector-row CT angiography

Fig. 1

Impact of ECG-gated CT angiography (CTA). Non-gated (a, b) and ECG-gated (c, d) CTA in a 66-year-old man with limited intimal tear. a Non-gated axial CT image shows a ‘dissection-like’ motion artifact (arrow) on the contour of the aorta because of pulsatile motion of the aorta. b Oblique sagittal slab maximum intensity projection (slab-MIP) image shows an undulating contour of the aorta caused by misregistration from the pulsatile motion. c ECG-gated CTA, performed 1 day after the non-gated CT, eliminates the pulsatile motion artifact. The image clearly reveals a hidden focal intimal tear (arrowhead). d Slab MIP image of ECG-gated CTA demonstrates visualization of the ascending aorta without misregistration artifacts. A focal bulge with a tiny intimal tear is revealed (curved arrow)

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