the invasive imaging tests of the liver -- angiography and transhepatic and endoscopic retrograde cholangiography -- are performed when insufficient information is obtained by the other methods ( as in diagnostic transhepatic cholangiography ) or when the procedure offers therapy ( as for biliary drainage , percutaneous transhepatic removal of common bile duct stones , percutaneous cholecystosis with gallstone dissolution and liver embolization , or the angiographic evaluation for portal shunting or liver resection ) .
C0023884
liver
C0019144
liver resection