Fig. 4

A To calculate the three components of the WSS, the longitudinal (l: in parallel to centerline, blue line), radial (r: pointing towards the centerline) and circumferential \( \left(\hat{c}=\hat{l}\times \hat{r}\right) \) unit vectors were calculated for each point on the lumen surface, located on a ring segment perpendicular to the centerline. B WSS components were determined for 14 ring segments at different locations of the aorta (1–6 ascending aorta, 7–8 bifurcation area, 9–14 descending aorta). Mean and median values of all three components were calculated for each ring segment