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Abstract #5028

Lipid Suppression Around Metal Implants Using a B1-Optimized Adiabatic Inversion Pulse

S Sivaram Kaushik1, Andrew Huettner2, Peter LaViolette3, Andrew Nencka3, and Kevin Koch3

1MR Applications and Workflow, GE Healthcare, Waukesha, WI, United States, 2MR Systems Engineering, GE Healthcare, Waukesha, WI, United States, 3Radiology, Medical College of Wisconsin, Milwaukee, WI, United States

A nonlinear iterative optimization algorithm was used to design an adiabatic inversion pulse with a bandwidth of 3.2 kHz. With a larger bandwidth, the new pulse maintains the same SAR as the original inversion pulse and also has an improved spectral profile. Images obtained on a phantom, and in-vivo, show improved fat suppression, and reduced ripple artifacts in the slice domain. In addition to improving image quality, the optimized RF pulse may improve the diagnostic ability of STIR with 3D multi spectral imaging.

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