An angiographic method is provided. The method includes: identification of a relevant part in acquired angiography 4D sequences which exhibit a vascular disorder or change determination of a centerline for the part ascertainment of lines parallel and surrounding the centerline specification of perpendicular cross-sections determination of voxels ascertainment of bolus curves as a function of time for each voxel which intersects one of the cross-sections determination of a time for each voxel measurement of the true Euclidean distance between voxels at the positions along the centerline and the parallel lines division of the measured distance by the time difference determination of second speed components, running transversely, proportional to the relative change in mass for each voxel and calculation of the blood flow in the relevant part of the vascular system on the basis of the speed components.
