A method and workstation for producing a combined image, including information from first and second diagnostic images, identify areas of increased uptake in the second diagnostic image as a region of interest which contains pixels representing the areas of increased uptake. The areas of increased uptake in second diagnostic image are mapped onto equivalent areas in the first diagnostic image using a deviation value calculated from a difference of a first peak position and a second peak position of pixel values of said pixels. The first peak position is a first significant peak of intensity values of the pixels and has a first intensity value, and the second peak position corresponds to a second intensity value which is half the first intensity value.