title: A critical evaluation of real-time ultrasonography for the study of gallbladder volume and contraction.
mesh_terms: D000328:Adult; D000368:Aged; D002765:Cholecystography; D005260:Female; D005704:Gallbladder / Q000033:anatomy & histology / Q000502:physiology*; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D014463:Ultrasonography