Figure 2. Chronologic course of liver biochemical parameters. Data expressed as mean ± standard error of the mean. ALT, alanine aminotransferase; AST, aspartate aminotransferase; ICG _R 15, indocyanine green retention rate at 15 minutes; PT, prothrombin time (% of normal level); S, NS, significantly (P < .05, paired t test) and not significantly different from value before portal vein embolization).