Figure 2.

Differences in considerably time variations of arterial hyperenhancement and portal-delayed wash-out on contrast-enhanced ultrasound: (A) time of arterial-phase hyperenhancement after contrast injection (seconds), (B) time of portal-delayed-phase wash-out after contrast injection (seconds), and (C) time interval between arterial-phase hyperenhancement and portal-delayed-phase wash-out (seconds) between small (≤3 cm) hepatocellular carcinoma (HCC) and intrahepatic cholangiocarcinoma (ICC) showing arterial-phase hyperenhancement and portal-delayed-phase wash-out.