Quantitative tumor liver contrast (TLC) at arterial phase (AP). Regarding quantitative evaluation, the subgroup of body weight (BW) ≤ 50 kg in Protocol-D showed a significantly higher TLC of hepatocellular carcinoma compared with Protocol-B by analysis of variance. (*; P = 0.0249, because it is considered that an excessive amount of iodine was administered to patients with low BW in Protocol-D). In the subgroup of BW > 60 kg, the TLC in Protocol-D was less than those in the other groups. Error bars indicate 95% confidence interval. CT; computed tomography, HU; Hounsfield unit. -50; up to 50 kg of BW, 50 < −60; greater than 50 kg, up to 60 kg of BW, 60<; greater than 60 kg of BW.