The accuracy of the MRI technique was subsequently verified by Alustiza et al. (13). They measured hepatic iron concentration in 112 patients with iron levels that varied from normal (n=68) to abnormal in patients with hereditary hemochromatosis (n=21) and transfusional hemosiderosis (n=23). The correlation coefficient between iron measured by MRI compared to tissue biopsy in this series was 0.957. This positive correlation verifies the Gandon technique.