[Delayed (modified) oral cholecystography in the study of biliary dyskinesia].

Biliary dyskinesia is difficult to be either diagnosed or treated. A modified oral cholecystography technique has been tested to make it suitable for studying such gallbladder disease. Routine oral cholecystography was performed and then two other roentgenograms were taken both 24 and 48 hours after it. In our opinion, further studies should be performed whenever gallbladder visualization lasts longer than 48 hours even in order to indicate surgery.