Systems and methods are provided for determining a synthetic electron density map based on at least one MR image dataset and based on at least one soft tissue image structure and one bone image structure determined in the synthetic electron density map. The soft tissue image structure and the bone image structure may be compared with the corresponding structures in the MR image dataset. From a correction of the first soft tissue image structure and/or of the bone image structure is based on the comparison, a corrected synthetic electron density map is determined.
