CT cholangiography

Last revised by Andrew Murphy on 06 Jun 2021

CT cholangiography is a technique of imaging the biliary tree with the usage of hepatobiliary excreted contrast. It is useful in delineating biliary anatomy, identifying a bile leak or looking for retained gallstones within the biliary system.

Second-line test (after ultrasound) when investigating for right upper quadrant pain, obstructive LFTs, etc. It can also be used in the postoperative setting (e.g. post cholecystectomy) where there is a concern for common bile duct injury or retained gallstones, or where intraoperative cholangiography (IOC) was unable to be performed due to extensive inflammation or a narrow cystic duct, proving direct cannulation difficult.

  • bilirubin should be <30 mmol/L nor should it be rising rapidly (as the impaired excretory ability of hepatocytes can affect contrast excretion in bile) 
  • severe hepatic or renal dysfunction
  • thyroid dysfunction
  • iodinated-contrast adverse reactions

CT cholangiography may be performed with either intravenous or oral cholangiographic contrast agents both of which outline the biliary tree with positive contrast. 

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Cases and figures

  • Case 1: normal CT cholangiogram
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  • Case 2
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  • Case 3
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  • Case 4
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  • Case 5
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  • Case 6: obstructive choledocolithiasis
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  • Case 7: traumatic bile leak
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