Focal liver lesions detection and characterization: The advantages of gadoxetic acid-enhanced liver MRI

Table 1 Imaging features of focal liver lesions in the dynamic vascular phases (after contrast administration) and in the hepatobiliary phase

	Phases
	Arterial	Portal	Delayed	Hepato-biliary
FNH	Hyperintense	Isointense	Isointense	Hyperintense/isointense (hypointense1)
Adenoma	Hyperintense	Isotense/slightly hypointense	Isotense/slightly hypointense	Hypointense (hyperintense or mixed hypo/hyperintense1)
Typical HCC	Hyperintense	Hypointense	Hypointense	Hypointense
Pre/early HCC (decreased portal supply)	Isointense	Hypointense	Hypointense	Hypointense
Pre/early HCC (increased arterial supply)	Hyperintense	Isointense	Isointense	Hypointense
Metastasis (hypovascular)	Irregularly hypointense	Irregularly hypointense	Irregularly hypointense	Hypointense
Metastasis (hypervascular)	Irregularly hyperintense	Isointense or hypointense	Inhomogeneously hypointense	Hypointense

¹Atypical behaviours of focal liver lesions. FNH: Focal nodular hyperplasia; HCC: Hepatocellular carcinoma.