A method is disclosed for producing a combination image. In an embodiment, the method includes acquiring at least one PET image data set depicting a region of interest, in particular at least part of a lung； acquiring at least one perfusion image data set depicting the region of interest using a second imaging modality； establishing a threshold value for the perfusion image data set and selecting the regions of the perfusion image data set that are below the threshold value and/or inverting the color palette or grayscale palette of the perfusion image data set； and combining the PET image data set and the perfusion image data set to form a combination image. A hybrid imaging modality is also disclosed.
