In radiology, the human body is studied with the help of imaging studies. Imaging studies are used to define a diagnosis and support the treatment decisions of the treating physician. Radiographies of the lungs, skeletal system and dentition are the most common imaging studies.

Clinical physiology examines the vital functions of the human body and failures therein. Clinical physiology examines the function of the lungs and heart and the esophagus with the help of various measurements, either as short-term examinations or ambulatory monitoring.

In nuclear medicine, the skeletal system and various organs are examined with the help of functional imaging studies using radioisotopes. In addition, radioisotopes are used in the treatment of diseases such as thyroid cancer.

Clinical neurophysiology investigates the function of the central and peripheral nervous system and muscular system and their disorders mainly by using electrical measurements. The most common examinations include the measurement of the electric function of the brain, electroencephalography (EEG), and the functional examination of the nerves and muscles, electroneuromyography (ENMG). Clinical neurology examines respiratory disturbances during sleep, as well as other other sleep disorders and daytime fatigue.