Figure 2

The figure shows the measured peak velocity in the vessel for each slice. The measure is an average over the time frames, and the error bars represent one standard deviation. Panel (a) shows the data for the smaller stenosis, s1, in phantom PH1. The conventional sequence (red diamonds) shows much higher standard deviations, and lower peak velocity than the 3D PC-UTE (green squares). Panel (b) shows the corresponding data for phantom 2. Again, the conventional sequence (red diamonds) shows much larger standard deviations than the 3D PC-UTE data (green squares). From the 3D PC-UTE data, the peak velocity is seen in the slice in the stenosis, after which the velocity drops. In the conventional data, the peak velocity is given to occur further downstream and keep more or less constant, which is not physically realistic.