The nuclear medicine technologist is a highly specialized health care professional who works closely with nuclear medicine physicians, radiologists and cardiologists using sophisticated radiation-detection instrumentation to perform planar studies, single photon emission computed tomography (SPECT) studies, positron emission tomography (PET) studies and the combination of PET and SPECT studies with computed tomography (CT) referred to PET/CT, SPECT/CT or molecular CT. Technologists’ primary responsibilities include: