Table 4. Comparison of DIC-CT and MR cholangiography.

Method	Advantages	Limitations	Indications
DIC-CT	Short scan time	Radiation exposure	Contraindications for MRC (e.g. cardiac pacemakers)
	High spatial resolution	Side effects caused by biliary contrast agent (iotroxic acid megulumine)	Pre-operative detailed evaluation of intrahepatic tiny bile duct (caudate, subvesical duct)
	High contrast of biliary tree (including intrahepatic bile duct)	Poor visualisation associated with hyperbilirubinaemia	Post-operative assessment (e.g. detection of bile leak)
	Evaluation of biliary flow and function	Insufficient opacification of excessively dilated biliary duct
MRCP	No contrast agent used	Artefacts and pseudolesions	First choice for pancreaticobiliary diseases, particularly in the investigation of biliary obstruction
	No radiation exposure	Contraindications for MRI
	High contrast of extrahepatic bile duct
	Information of pancreatic duct
EOB-MRC	Biliary flow imaging	No depiction of peripheral bile duct	Additional information about bile duct on ordinary Gd-EOB-DTPA- enhanced liver MRI
		Poor visualisation associated with liver dysfunction

DIC-CT, drip infusion cholangiography with CT; EOB-MRC, gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid-enhanced MR cholangiography; Gd-EOB-DTPA, gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid; MRCP, MR cholangiopancreatography.