Precedence SPECT/CT merged system affords a comprehensive solution, providing registered SPECT and CT images in addition to individual SPECT, CT, or planar nuclear medicine images. Clinicians can employ the fused SPECT/CT data sets to facilitate localization of pathology or alternatively, can acquire the individual datasets in a single imaging session, improving workflow and patient comfort. Precedence with 16-slice CT is ideal for high resolution CT studies with complementary SPECT studies, providing the ability to do a combined coronary CTA, coronary calcium scoring and attenuation-corrected SPECT myocardial perfusion imaging in a single imaging session. The ability to perform various studies in one exam saves time for both patients and physicians.  The combination of functional SPECT data with the anatomical precision of CT data provides diagnostic confidence to physicians.