text: Endoscopic retrograde cholangiopancreatography (ERCP) is considered a gold standard test for diagnosing biliary obstruction. Magnetic resonance cholangiopancreatography (MRCP) and percutaneous transhepatic cholangiography (PTCA) are the most sensitive techniques to correctly determine the underlying cause and level of biliary obstruction in patients with acute cholangitis when ERCP fails.
option_0: Cholangitis other diagnostic studies
option_1: Primary sclerosing cholangitis other diagnostic studies
option_2: Pyogenic liver abscess other imaging findings
option_3: Ascending cholangitis other diagnostic studies
option_4: Pyogenic liver abscess risk factors
option_5: Cholangitis diagnostic study of choice
option_6: Gallstone disease other imaging findings
option_7: Gallstone disease other diagnostic studies