Automated Generation of Reliable Blood Velocity Parameter Maps from Contrast-Enhanced Ultrasound Data

Figure 1

Flow phantom measurements. Parametric maps of different resolutions were calculated and color-coded as shown in (a). At higher resolution, a laminar flow profile can be observed. These measurements were performed at different flow speeds and used to calculate the mean flow velocity. The correlation () of calculated mean flow velocity and preadjusted flow velocity are exemplarily shown for a pixel-wise analysis, a binning size of 64, where 8 × 8 pixels were binned, and a binning size of 4096, where the whole ROI is covered by a single segmentation in (b). It proves the independence of the pixel size and mean flow velocity of the whole ROI at ideal conditions, as well as the functionality of our algorithm to calculate flow velocities. The correlations for the other binning sizes are shown in Supplement Figure2.

(a)

(b)