Figure 2

Pressure wave measurements on the vessel phantom. Figure 2a shows a representative time course of the pressure wave recoded on the vessel phantom (sample rate = 100 ms^-1). Figure 2b illustrates the transit of the pressure wave. In order to depict the PWV as the slope of the linear regression line, the independent variable, i.e., the pulse onset time is exceptionally plotted along the abscissa. The diagram shows one of six series of measurements that were performed at different installation heights (here +2 mm) of the vessel phantom relative to the MR iso-center.