Keywords: Vessels, Vessels, non-contrast-enhanced angiography, REACTRecently introduced Dixon-based MR angiographic techniques have shown promise for non-contrast enhanced vascular imaging, though off-resonance effects induced by B0 inhomogeneities may result in water-fat separation errors (i.e., swaps) during Dixon water fat separation, typically seen in a large field of view at high field strength. In this work, we investigate possible swaps via numeric simulations and in vivo measurements with various shimming techniques as well as reconstruction options for B0 demodulation. Initial results may suggest practical methods to mitigate water-fat swaps and improve technical robustness even in challenging applications.
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