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Figure 4. Hepatocellular carcinoma(HCC) (Edmonson grade IV) in a 60-year-old woman. (a) Arterial phase image obtained 18 s after contrast agent administration shows a heterogeneous hyperenhancement of the lesion. (b) Portal phase image obtained at 32 s. The nodule is slightly hypoechoic with respect to the surrounding liver. (c) Portal phase image obtained at 90 s. The nodule is hypoechoic with respect to the surrounding liver. (d) Late portal phase image obtained at 180 s. The nodule is remarkably hypoechoic with respect to the surrounding liver.
