Aortic stiffness is a valuable imaging marker because of its association with a variety of cardiovascular conditions such as abdominal aortic aneurysm (AAA). Calculating AAA stiffness from aortic MRE data presents a unique challenge due to the relatively small size of an AAA compared to the liver. In the present study, we propose a new inversion strategy that consists of directional filters that are designed to extract the propagating waves along the axial direction of the AAA, and uses the wave information along the axial direction for stiffness calculation to reduce the impact of AAA geometry on stiffness estimation.
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