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Fig. 1B —63-year-old woman with multifocal recurrence of hepatocellular carcinoma (HCC) 9 years after hepatic resection. Transverse IV contrast-enhanced MDCT images of liver in arterial (A) and portal venous (B) phases compared with C-arm CT images in arterial (C) and portal venous (D) phases obtained after administration of transarterial contrast material before transarterial chemoembolization. On MDCT, only three lesions (black arrows, A–D) with weak hyperdense arterial enhancement and isodense enhancement in portal venous phase were identified as HCC nodules. In corresponding C-arm CT images, these lesions show strong rim enhancement in arterial phase (C) and slightly hypodense enhancement in portal venous phase (D). An additional lesion with equal enhancement pattern was seen only on C-arm CT (white arrow, C and D) and was counted as false-positive finding on C arm CT.