Ultrasound--non-invasive imaging in the abdomen.
D000005:Abdomen; D005767:Gastrointestinal Diseases / Q000175:diagnosis; D006801:Humans; D008107:Liver Diseases / Q000175:diagnosis; D013158:Splenic Diseases / Q000175:diagnosis; D014463:Ultrasonography; D014570:Urologic Diseases / Q000175:diagnosis