Schaafs LA, et al. – This study was designed to elucidate elastography of the proximal abdominal aorta based on externally induced time–harmonic shear waves. Time harmonic elastography of the abdominal aorta was considered to be a feasible technique for the exploitation of time–varying shear wave amplitudes as a diagnostic marker for aortic wall stiffening. Moreover, patients with elevated pulse wave velocity (PWV) demonstrating increased aortic wall stiffness were best identified by (delta)shear wave amplitude—a parameter that could be related to the ability of the vessel walls to distend on passages of the pulse wave.