Figure 10b. Small HCC in a 54-year-old man with chronic liver disease. (a) Baseline US image shows a small, hypoechoic nodule (arrows) (cf Fig 9a). (b) Arterial phase US image obtained 26 seconds after contrast material injection demonstrates diffuse homogeneous enhancement of the nodule (arrows). (c) Portal phase US image obtained 41 seconds after injection shows isoechogenicity of the nodule (arrow).