To characterize non-laminar flow dynamics and decreased wall shear stress (WSS) and high oscillatory shear index (OSI) of the infrarenal abdominal aortic dilatation, cardiac phase-resolved 3D phase-contrast MRI (4D-flow MRI) in 18 patients is performed to compare blood flow patterns, WSS, and OSI in the dilated and non-dilated areas. These results suggest that 4D-flow MRI may be useful in predicting the risk of atheroma development in the infrarenal abdominal aorta and aneurysm.

Yasuo Takehara, Haruo Isoda, Mamoru Takahashi, Naoki Unno, Norihiko Shiiya, Takasuke Ushio, Satoshi Goshima, Shinji Naganawa, Marcus Alley, Tetsuya Wakayama, Atsushi Nozaki., "Abnormal Flow Dynamics Result in Low Wall Shear Stress and High Oscillatory Shear Index in Abdominal Aortic Dilatation: Initial in vivo Assessment with 4D-flow MRI", Magnetic Resonance in Medical Sciences, 19 (2020) 235-246.