1. A method for reducing step artifacts in a forward increment direction of a cardio CT representation, the method comprising: recording at least one of volume recordings and section images of first and second sub-volumes of a heart volume, which lie adjacent to one another in the forward increment direction and partially overlap in an overlap region, by a computer tomography system, detector data of each sub-volume being used for the reconstruction coming from different heart cycles; determining a displacement vector relative to the second sub-volume, at least for a selected point of the overlap region of the first sub-volume; and subjecting, at least partially, the second sub-volume to a spatial transformation according to the at least one displacement vector.