In the fourth volume of the guidelines presents topics transabdominal the study of diseases of the stomach and intestines, soft tissues, salivary and parathyroid glands, blood vessels of the head and neck, retroperitoneal tumors, invasive procedures under the control of ultrasound in abdominal surgery and uronephrology, the use of contrast agents, the efficiency of the diagnostic procedures, capabilities and limitations of alternative diagnostic methods of radionuclide diagnostics, computer tomography, magnetic resonance imaging).