1. A detection values processing apparatus, the detection values processing apparatus comprising: a detection values providing unit for providing detection values, the detection values being energy-dependent detection values, which are generated by a detector and which are indicative of radiation after having traversed an examination zone, the radiation being polychromatic radiation emitted by a radiation source and being filtered by a filter which comprises K-edge filter material having a K-edge within the energy range of the polychromatic radiation, a component decomposition unit for applying a component decomposition technique to the detection values for determining K-edge attenuation values being first component attenuation values, which are indicative of an attenuation caused by the K-edge filter material, and additional component attenuation values, which are indicative of an attenuation caused by additional components of the examination zone, from the energy dependency of the detection values, a reconstruction unit for reconstructing an image of the examination zone from the additional component attenuation values.