Gray scale ultrasonography in the diagnosis of abdominal diseases.
D000008:Abdominal Neoplasms / Q000175:diagnosis; D001660:Biliary Tract Diseases / Q000175:diagnosis*; D006801:Humans; D008107:Liver Diseases / Q000175:diagnosis*; D010182:Pancreatic Diseases / Q000175:diagnosis*; D014463:Ultrasonography