Figure 2. 64-year-old woman with hepatocellular carcinoma who underwent hepatectomy. (a) Grey scale fundamental ultrasound shows hypoechoic lesion, 2.8 cm in diameter, in S4 of the liver (arrows). (b) Contrast-enhanced ultrasound images by coded harmonic imaging at 60 s after administration of Levovist. Tumour vessels are observed as fine images flowing into the tumour (arrow). (c) Contrast-enhanced ultrasound images acquired by 1-s intermittent transmission at 80 s after administration. Perfusion flow is imaged as an area of diffusely increased vascularity within the tumour (arrows).