Figure 3.

The estimated similarity values [see Eq. A1], absolute magnitude and angular differences between three pairs of velocity fields [MRA vs. CFD₁, MRA vs. CFD₂, and CFD₁ vs. CFD₂] for (a) the transverse and (b) the longitudinal planes in aneurysm A illustrated in Figs. 2a, 2b, respectively. The velocity data correspond to a phase at the diastole. Arrows on 3D velocity vector plots [top plots of both (a) and (b)] indicate a border region between the velocity jet and the low-velocity recirculation zone. In this figure, CFD₁ and CFD₂ denote non-Newtonian and Newtonian CFD simulations, respectively. Manually-delineated contours on both (a) and (b) indicate regions within the aneurysm dome. Mag (m/s), Ang (degree) and Sim [0-1] denote the absolute magnitude and angular differences, and the similarity metric between two velocity vectors, respectively. The arrows in the similarity plots (left lower three columns) point to low similarity values, where arrows in the absolute magnitude (right lower three columns) and angular (middle lower three columns) difference plots point to large discrepancies in both magnitude and direction of two sets of comparing vectors.