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Estimating Aortic Stiffness Using Aortic MR Elastography Using an Inversion without Considering the Geometry
Huiming Dong1, Prateek Kalra1, Richard D White1, and Arunark Kolipaka1
1Radiology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
We demonstrated a new inversion strategy for aortic MRE to reduce the impact of aorta (abdominal aortic aneurysm) geometry on stiffness estimation.
Figure 1. Flow Diagram of the Proposed Aortic MRE Inversion Strategy.
Figure 4. Aortic Stiffness in Healthy Subjects and in AAA Patients. MRE wave images were overlaid on the anatomical image for each subject. Higher stiffness was observed in senior healthy subject (a vs. b). For patients, vascular surgeons were blind to AAA stiffness measurements. EVAR repairs were recommended to the patients based on AAA diameters and growth rate. In patients with small or stable AAAs (c, d and f), AAA stiffness was considerably higher than that in patient who has a rapidly growing AAA (e). All stiffness estimation were performed using the proposed inversion technique.