Research Article

Computational Hemodynamic Analysis for the Diagnosis of Atherosclerotic Changes in Intracranial Aneurysms: A Proof-of-Concept Study Using 3 Cases Harboring Atherosclerotic and Nonatherosclerotic Aneurysms Simultaneously

Figure 6

((a)–(e)) Graphs showing the results of computational hemodynamic analysis in Case 1. The graph of the atherosclerotic aneurysm (AN2) is colored yellow. (a) Pulsatile flow rates of the internal carotid artery measured by phase-contrast MR (volume, 271.7 (mL/min); heart rate, 63 (bpm); heart beat duration (), 0.952 (s)). (b) Volume of inflow. (c) Mean flow velocity inside aneurysms. (d) The spatially averaged value of blood age inside the aneurysms. (e) The maximum values of blood age inside the aneurysms. Note that the maximum age inside AN2 increased linearly, and the inclination was unity over 5 cardiac cycles. (f) Contour maps of blood age . (g) A cutting plane of blood age in AN2 . (h) Velocity vectors on the cutting plane . Old blood was seen near the wall (a black arrow in (g)) due to recirculatory flow (arrowheads in (h)). MR: magnetic resonance.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)