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  Indian J Med Microbiol
 

Figure 1: Typical enhancement pattern of hepatocellular carcinoma on contrast-enhanced ultrasound images. (a) An isoechoic tumor (white arrow) is seen at S4 on the gray-scale ultrasound image. (b) Hyperenhancement of this lesion (white arrow) can be seen during the early arterial phase (20 s after the injection of contrast agent), and the feeding vessel can also be seen clearly (yellow arrow). (c) Washout of the tumor can be seen during the early portal phase. (d) The tumor displays hypoenhancement or nonenhancement during the delayed phase

Figure 1: Typical enhancement pattern of hepatocellular carcinoma on contrast-enhanced ultrasound images. (a) An isoechoic tumor (white arrow) is seen at S4 on the gray-scale ultrasound image. (b) Hyperenhancement of this lesion (white arrow) can be seen during the early arterial phase (20 s after the injection of contrast agent), and the feeding vessel can also be seen clearly (yellow arrow). (c) Washout of the tumor can be seen during the early portal phase. (d) The tumor displays hypoenhancement or nonenhancement during the delayed phase