Determining the velocity of a fluid by means of an imaging method

There is described a method (100) for determining the velocity (v In the method (100), a plurality of spaced apart portions (ROI It will be time-dependent image data (BD (t)) for the plurality of spaced apart portions (ROI Moreover, time-density curves (ZDK In addition, the temporal shift (At) of time-density curves (ZDK Finally, the fluid velocity (v Also described is a fluid velocity determining means (70). Moreover, a computed tomography system (1) will be described.