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Fig. 3A —24-year-old asymptomatic woman with incidentally discovered liver mass (focal nodular hyperplasia). Maximum-intensity-projection imaging shows vascular morphologic features and direction of lesional filling in highly vascularized lesion. See also Figure S3C, cine loop, in supplemental data online. Conventional sonographic image obtained 9 seconds after the end of saline flush shows homogeneous enhancement of mass. Lesional vessels are not visible because of very rapid homogeneous filling of vessels.