what is a cholangiogram
[kÅlanâ²jÄÂ·Égramâ²]. an x-ray film of the bile ducts produced after injection of a radiopaque contrast medium. A cholangiogram is routinely performed before or after biliary tract surgery. A postoperative radiogram may be made after injecting an iodinated contrast medium through an indwelling T-tube.The medium also may be introduced directly into the biliary system or intravenously. See also cholangiography, cholecystography. cholangiogram is routinely performed before or after biliary tract surgery. A postoperative radiogram may be made after injecting an iodinated contrast medium through an indwelling T-tube. The medium also may be introduced directly into the biliary system or intravenously. See also cholangiography, cholecystography.