A method for the reconstruction of planning images is based on a plurality of first respiratory cycles of a patient and tomographic raw data recorded at the same time as the first respiratory cycles being received. A reference cycle is determined based on respiratory cycles of the patient, in particular based on the first respiratory cycles of the patient. A reference cycle is subdivided into temporally equidistant reference phases, a reference amplitude being associated with each reference phase. The reference amplitudes are not equidistantly scanned therefore. Furthermore, the first respiratory cycles of the patient are subdivided into first phases, the temporal positions of the first phases each being based on one of the reference amplitudes. Reconstruction of planning images based on first intervals of the raw data follows, wherein the first intervals correspond to the first phases.
