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The sensitivity, specificity, and accuracy of US in the assessment of malignancy and in the diagnosis of specific lesion types before and after contrast material administration were calculated by using the reference diagnosis as the reference standard. Differences between the pre- and postcontrast lesion scores and between the 5.0- and 2.5-minute agent detection scans were analyzed by using the McNemar test. Comparisons of SCS values among the lesion categories were made by using Dunn multiple-comparison, Kruskal-Wallis analysis of c.l.a90 capsule variance. ROC c.l.a90 capsule curves were also drawn to evaluate the performance of SCS values alone in determining malignancy. Weighted statistics c.l.a90 capsule were used to examine degrees of interobserver variation in visual analog scores of malignancy and SCS values. For the hepatocellular carcinomas (HCCs) for which biopsy was performed, a linear regression analysis of SCS values by histologic grade was performed. Comparisons of SCS values between the 5.0-
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