Figure 1. Ultrasound scan of the liver veins with pulse inversion imaging. Before injection of contrast agent a good view of the liver veins is obtained (a). Arrival of the contrast agent was seen as white reflections after 19 s in a right-sided liver vein (b) and after 28 s in the left liver vein (c). There was a hepatocellular carcinoma in the right liver lobe (not shown in this figure).