Assessment of the Wall Shear Stress (WSS) of the Abdominal Aortic Aneurysm Using Time-Resolved Three-Dimensional Phase-Contrast MRI (4D-Flow) and a New WSS Mapping Application (Flova)
Takehara Y, Isoda H, Yamashita S, Takeda H, Ohkura Y, Kosugi T, Hirano M, Alley M, Markl M, Sakahara H, Pelc N
Hamamatsu University School of Medicine, Hamamatsu University School of Medicine
To assess if time-resolved three-dimensional phase-contrast MRI (4D-Flow) data postprocessed by a new application gFlovah can provide 4-dimensional WSS mapping of the abdominal aortic wall affected by aneurysm, 3 consecutive patients with infrarenal abdominal aortic aneurysm (AAA) were examined. WSS of the AAA was significantly lower (less than 0.2 Pa) than that of non-aneurysmal wall near the aneurysm (over 1.5 Pa) in all patients. Combined use of the 4D-Flow and Flova enabled WSS mapping of AAA. The lower WSS in AAA may be reflecting that the aneurismal wall is continuously affected by the growing risk of aneurysmal growth and rupture.