Average HIC predicted by R2 (equation 6) and R2^* (equation 2) is plotted versus HIC by biopsy in 19 patients. (Patient with HIC of 57.8 was excluded from the graph and statistics.) + indicates individual data point; solid line, best fit by linear regression; and dotted lines, 95% confidence intervals for the prediction. Regression slope is 0.98, and R value is 0.99. However, Bland-Altman limits of agreement are no better than from the individual measurements (Table 1).