Absolute values of sodium content in tumors is one of the most important biomarkers for cancer diagnostics and therapy monitoring. An accurate quantitative values are influenced by B1 inhomogeneity that must be evaluated and corrected. In this work, we compared two mapping methods DAM and PS. On the basis of our results, we found that DAM gives overestimated flip angle values (approximately 30% higher than PS). Also, after correction is applied, DAM shows higher signal drop in comparison with PS. Accompanied with longer measurement time necessary for DAM, this findings give advantages to PS in clinical studies and routine implementation.