Method and hybrid imaging modality for producing a combination image

A hybrid imaging modality for forming a combination image, comprising:

• a PET scanner;
• at least one second imaging modality;
• and
• a control device configured to
• acquire at least one PET image data set depicting a region of interest via the PET scanner,
• acquire at least one perfusion image data set depicting the region of interest via the second imaging modality,
• establish a threshold value for the at least one acquired perfusion image data set and at least one of selecting areas of the perfusion image data set that are below the threshold value and inverting a color palette or grayscale palette of the at least one perfusion image data set, and
• combine the acquired at least one PET image data set and the at least one perfusion image data set to form the combination image.