TABLE 2.

Defnition and grading system for the three FLIS parameters.

Parameter	Points
Liver parenchymal enhancement quality score
SI of liver parenchyma relative to kidney on HBP
Hypointense	0
Isointense	1
Hyperintense	2
Biliary contrast excretion quality score
Presence of contrast media in the bile ducts on HBP
No biliary contrast excretion	0
Excretion into peripheral intrahepatic bile ducts or the right and/or left hepatic duct(s)	1
Excretion into the common hepatic duct, the common bile duct, or the duodenum	2
Portal vein sign PVsQS
SI of the portal vein relative to the liver parenchyma on HBP
Hyperintens	0
Isointense	1
Hypointense	2

SI, signal intensity; HBP, hepatobiliary phase; PVsQS, portal vein sign quality score.