The invention relates to a method for dual-energy mammography. To enable earlier recognition of the microcalcifications as precursors of an oncological tumor in the breast, the invention provides that a comparison pattern with known distributions for density, thickness and effective atomic number are disposed next to the breast that based on the comparison pattern, the parameters of the relationship between the atomic number and the difference and ratio of the logarithms of the number of photons that flow through the breast without cooperation at two different radiation energies are determined and that based on this relationship, the distribution of the atomic numbers in the breast are visually displayed.
