Improved Abdominal Diffusion Weighted Imaging at 3T using Optimized Shinnar-Le Roux Adiabatic Radiofrequency Pulses

At 3T, radiofrequency B1 field inhomogeneity affects data quality and signal to noise ratio of abdominal diffusion weighted imaging (DWI). The purpose of this work is to develop new approaches for 3T abdominal DWI, that rely on the use of adiabatic pulses in a single- or twice-refocused acquisition. We show that adiabatic RF pulses lead to increased signal in regions suffering from B1 inhomogeneity, which in turn results in improved quality for apparent diffusion coefficient maps measured in a healthy volunteer at 3T.

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