the contrast agent before the breast is released in step s 7 the processing of the images or image data generated in steps s 1 through s 7 takes place in the steps shown in fig6 b steps s 8 through s 12 can thereby also be implemented in a different order than as shown in fig6 b insofar as the registration of the corresponding images or image data occurs before a reconstruction or subtraction of these images or image data moreover steps s 8 through s 12 do not need to occur after steps s 1 through s 7 rather these can be interleaved with these steps s 1 through s 7 insofar as the images or image data required for a processing step s 8 through s 12 are created beforehand via the corresponding generation steps s 3 s 4 s 6 in step s 8 the two dimensional low energy image 1 is registered with each of the high energy images 2 wherein this registration is implemented depending on a three dimensional low energy image created before the administration of the contrast agent in step s 9 the low energy image is subsequently subtracted from each high energy image whereby a number of dual energy images or reference images is created which corresponds to the number of two dimensional high energy images the respective subtraction of the low energy image from the respective high energy image is also designated as non temporal dual energy subtraction in step s 10 the image data of the high energy.