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Figure 4 : Contrast US liver. The images on the left show contrast enhancement with images on right showing gray scale image. (a,b) Prominent tortuous feeding artery (white arrow) demonstrating rapid enhancement with centrifugal lesion enhancement before liver parenchymal enhancement begins, so that lesion forms an intensely enhancing region (c), the so-called ‘light-bulb sign’ (d)The liver takes up contrast to match the enhancement of the focal nodular hyperplasia (FNH), with stellate central scar seen (white arrow). (Case courtesy Dr T Kim, University of Toronto, Canada)

Figure 4 : Contrast US liver. The images on the left show contrast enhancement with images on right showing gray scale image. (a,b) Prominent tortuous feeding artery (white arrow) demonstrating rapid enhancement with centrifugal lesion enhancement before liver parenchymal enhancement begins, so that lesion forms an intensely enhancing region (c), the so-called ‘light-bulb sign’ (d)The liver takes up contrast to match the enhancement of the focal nodular hyperplasia (FNH), with stellate central scar seen (white arrow). (Case courtesy Dr T Kim, University of Toronto, Canada)