Method and apparatus for post-processing radiographs

An apparatus for post-processing radiographs from radiographic data including spectral recordings of a region of interest of an object, the apparatus comprising:

• an image unit configured to
• create, from the radiographs, a first image in which a first material of the object is highlighted and a second material of the object is suppressed, the first material having different spectral attenuation properties than the second material, and
• create, from the radiographs, a second image in which the second material is highlighted and the first material is suppressed;
• a post-processing unit configured to post-process the first image and the second image, wherein the first image is post-processed by a first filter module and the second image is post-processed by a second filter module;
• a combining unit configured to combine the post-processed first image and the post-processed second image to form a single image in which the first material and the second material are depicted;
• and
• an output unit configured to output the single image.