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Fig. 7 Graph shows contrast phase versus degree of hepatic arterial
enhancement or washout of hepatocellular carcinoma. Degree peaked in early
hepatic arterial phase (HAP) and then decreased rapidly. Degree turned
negative over portal venous phase (PVP) and equilibrium phase (EP).
Significant differences in mean degree (p < 0.05) exist between
all phases. Qualitative results correspond well with quantitative results in
Figure 4.