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R2* map (below) is the reciprocal of T2* map (above). Both maps depict the distribution of iron in the liver. In this patient, the left lobe has greater iron content than the right lobe, and it appears darker than the right lobe on the T2* map and brighter on the R2* map. As illustrated in this case, R2* maps may depict heterogeneity in iron distribution to better advantage than T2* maps because of their wider gray-level dynamic range.
