Magnetic resonance imaging performance: a comparison of sodium and hydrogen.

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Abstract
Although many nuclei can be used to produce magnetic resonance (MR) images, technical considerations dictate the choice of certain of these. Hydrogen is the most favorable, followed by Na. An evaluation of the imaging performance of Na MR imaging based on imager performance and biologic factors is presented. Because it is hampered by high operating fields, low signal-to-noise levels, and radiofrequency power deposition constraints, careful clinical comparisons will be needed to identify a diagnostic niche that could take advantage of the large Na differences known to exist within biologic systems.