There are at least four types of<unk> : # Percutaneous transhepatic<unk>  (PTC): Examination of liver and bile ducts by x-rays. This is accomplished by the insertion of a thin needle into the liver carrying a contrast medium to help to see blockage in liver and bile ducts. # Endoscopic retrograde cholangiopancreatography (ERCP). Although this is a form of imaging, it is both diagnostic and therapeutic, and is often classified with surgeries rather than with imaging. # Primary<unk>  (or perioperative): Done in the operation room during a biliary drainage intervention. # Secondary<unk> : Done after a biliary drainage intervention. In both cases fluorescent fluids are used to create contrasts that make the diagnosis possible.<unk>  has largely replaced the previously used method of intravenous<unk>  (IVC). * Magnetic resonance cholangiopancreatography (MRCP) is another<unk>  method.
Cholangiography
Cholecystography
Percutaneous transhepatic cholangiography
Magnetic resonance cholangiopancreatography
Intravenous cholangiography
Liver biopsy
Splenic aspiration
Hepatogram