An assembly of diagnostic devices that comprise a radiological imaging system that is a combination of a single photon emission computed tomography (SPECT) camera system for nuclear medicine (NM) images, and a computed tomography (CT) camera system for x-ray images. The nuclear medicine images and the x-ray images may be registered and displayed in a fused format (overlaid in the same orientation) for the anatomical localization of the nuclear medicine data (i.e., distribution of radiopharmaceuticals). The SPECT and CT portions of the system may be used independently or in combination and the images may be transferred to other systems for radiation therapy planning or additional processing.