Cerebral metabolic imaging can be accomplished with positron emission computer tomography (PET), magnetic resonance spectroscopy, and functional magnetic resonance imaging.
PET uses positron-emitting radioisotopes of elements with short half-live such as fluorine-18, oxygen-15, nitrogen-13, and carbon-11 as tracers to image and to measure the cerebral metabolism.

Nuclear cardiology has a wide range of techniques that permit the accurate assessment of perfusion, metabolism, sympathetic innervation, and mechanical function of the heart.

Scintigraphic techniques of the heart include:
See also Echocardiography and Cardiovascular Imaging.