Evaluation of Radio-Frequency Field Mapping Methods for Quantitative Sodium MRI at 3 Tesla

Quantitative sodium MRI requires corrections for rf field inhomogeneities in order to determine the total tissue sodium concentration. The low SNR and fast decay of the sodium signal are hard restrictions for mapping techniques. Thus, the performance of four common methods (PS, BSS, DAM, AFI) has been compared to find the adequate method. The PS method shows best SNR and fastest acquisition time. This enables more accurate and fast in-vivo sodium quantification being a sign of tissue viability.

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