A contrast-enhanced imaging of an object is performed by an imaging device having a movable radiation source. A first projection image sequence of the object along a first trajectory over which the radiation source moves is recorded by radiation having a first energy spectrum. Subsequently, a second projection image sequence of the object along a second trajectory over which the radiation source moves is recorded by radiation having a second energy spectrum. A reconstruction of a three-dimensional subtraction image in relation to the different energy spectra is carried out by the first and second projection image sequence. In addition, a two-dimensional subtraction image in relation to the different energy spectra is reconstructed with the aid of the first and second projection image sequence. In this way, apart from a three-dimensional subtraction image, a two-dimensional subtraction image is also provided for better analysis of object characteristics.
