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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