Ultrasound and the gallbladder.
D001652:Bile Ducts / Q000033:anatomy & histology; D002769:Cholelithiasis / Q000175:diagnosis; D003937:Diagnosis, Differential; D005704:Gallbladder / Q000033:anatomy & histology; D005705:Gallbladder Diseases / Q000175:diagnosis*; D006801:Humans; D013997:Time Factors; D014463:Ultrasonography