[Ultrasound diagnosis of the liver and gallbladder (author's transl)].

Ultrasound echography has proved a non-invasive, reproducible, harmless and, for the patient, not burdensome technique for the diagnosis of diseases of the liver and bile ducts in the right upper abdomen. Diffuse changes of the organs and disease of the bile ducts as well as cystic or tumorous solid changes in the upper abdomen are the main spheres of sonography. The use of "grey value" techniques has increased the efficiency of compound ultrasound examinations. We can expect further improvements with digital computerised evaluation of signals.