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Abstract #3412

MRI Near Metal Using Multi-Spectral 3D Variable Flip-Angle TSE

Sina Tafti1, John P Mugler III2, Kevin Vu1, William J Garrison3, and G Wilson Miller2
1Department of Physics, University of Virginia, Charlottesville, VA, United States, 2Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States, 3Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States

Multi-spectral imaging techniques such as MAVRIC, SEMAC, and MAVRIC SL based on 3D TSE sequence significantly reduce metal artifacts. MAVRIC and MAVRIC-SL techniques traditionally employ Gaussian RF pulses to achieve an optimal sum of squares composite image while SEMAC uses windowed-sinc RF pulses. In this work, we implement multi-spectral acquisition into the variable flip-angle TSE with hard RF pulses which yields a desirable sum of squares composite image while achieving high turbo-factor and minimal echo spacing in imaging near metallic screws in phantom and an ex vivo lamb leg.

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