Sonography of the upper abdomen.
D000005:Abdomen; D001660:Biliary Tract Diseases / Q000175:diagnosis; D005705:Gallbladder Diseases / Q000175:diagnosis; D006801:Humans; D008107:Liver Diseases / Q000175:diagnosis; D010182:Pancreatic Diseases / Q000175:diagnosis; D014463:Ultrasonography