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Fig. 5. —Bar chart shows values of area under receiver operating characteristic curve (A_z values) that describe performance of three observers and pooled data for gadolinium-enhanced MR imaging (striped bar) and ferumoxide-enhanced MR imaging (black bar) in patients without cirrhosis. Gadolinium-enhanced MR imaging gave significantly (p < 0.05) better data than did ferumoxide-enhanced MR images for observers 2 and 3 and for pooled data.