Diagnostic sensitivity of imaging modalities for hepatocellular carcinoma smaller than 2 cm

Table 2 Imaging patterns for the conclusive diagnosis of hepatocellular carcinoma by the four modalities

Modality	Imaging pattern
Contrast-enhanced CT	Hypervascularity in the arterial phase and washout in the equilibrium phase
Sonazoid contrast-enhanced ultrasonography	Hypervascularity in the early vascular phase and defect in the Kupffer phase
Gd-EOB-DTPA magnetic resonance imaging	Hypervascularity in the arterial phase and/or defect in the hepatobiliary phase
CT arterioportal angiography	Hypervascularity by CTA and/or perfusion defect by CTAP

CT: Computed tomography; CTA: CT during arteriography; CTAP: CT during arterial portography; Gd-EOB-DTPA: Gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid.