1. A method for generating a motion-corrected 3D image of a cyclically moving object by means of an ultrasound probe, comprising the following steps: a) providing at least one 3D reference image of the object, wherein the 3D reference image covers a 3D scan volume and shows the object substantially at one phase in the cyclic movement of said object; b) acquiring a set of at least two sub-images of the cyclically moving object with the ultrasound probe, each of the sub-images covering a 3D subset of the 3D scan volume; c) registering at least two of the set of sub-images acquired in step b) with the 3D reference image by using of a non-rigid transformation, thereby generating at least two motion-corrected sub-images; d) reconstructing a motion-corrected 3D image from the motion-corrected sub-images; and e) displaying the reconstructed motion-corrected 3D image.