Abdominal Aortic Aneurysms (AAAs) are common in older men. Guidelines recommend repair at an aneurysm diameter greater than 5.5 cm, but some smaller aneurysms experience catastrophic rupture. Aneurysm features beyond diameter have been explored as markers of disease progression. We used DCE MRI to explore the inhomogeneity of contrast kinetics, including Ktrans, in the aneurysm wall and assess if these markers independently predict AAA progression. Significant differences in DCE metrics were identified around the AAA circumference. Area under enhancement-time curve and enhancement slope correlated with growth rate but not diameter, suggesting that DCE may provide diameter-independent information regarding AAA risk.
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