Up to now, only a few abdominal 23Na-MRI studies have been performed at 7T. In this work a 23Na body coil for 7T was enhanced. To achieve an improved homogeneity in the transmit field and in the receive sensitivity, transmit phase settings were optimized and four separate receive channels were implemented. Field distributions in a phantom were obtained for the original and the enhanced configuration. Both setups were applied to the human chest and abdomen. Transmit and receive homogeneity are markedly improved for the enhanced setup. Improvements for in-vivo image quality are especially visible in the contour of the body.
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