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Abstract #3641

In-Vivo Fully Phase-Encoded Magnetic Resonance Imaging in the Presence of Metal using Multiband RF Excitation

Nathan S Artz 1,2 , Curtis N Wiens 1 , Matthew R Smith 1 , Diego Hernando 1 , Alexey Samsonov 1 , and Scott B Reeder 1,3

1 Department of Radiology, University of Wisconsin, Madison, WI, United States, 2 Department of Radiological Sciences, Saint Jude Children's Research Hospital, Memphis, TN, United States, 3 Department of Medical Physics, University of Wisconsin, Madison, WI, United States

A spectrally-resolved, fully phase-encoded (SR-FPE) 3D FSE technique can avoid artifacts near metal due to frequency-encoding, but long scan times have limited work to phantoms. The purpose of this work was to translate SR-FPE to the in-vivo setting using multiband RF excitation to accelerate imaging. In a volunteer with a total knee replacement, an interleaved tri-band SR-FPE approach successfully acquired six RF offsets in 13:19min. In a volunteer with the head of a hip prosthesis placed posterior to the knee, 24 RF offsets were acquired in 34:38min. This work demonstrates the feasibility of in-vivo, multiband SR-FPE near metallic implants.

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