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Abstract #2431

Spectrally Resolved Fully Phase-Encoded 3D Fast Spin-Echo for Metal Artifact Reduction and Spectroscopic Imaging

Nathan S. Artz1, Diego Hernando1, Valentina Taviani1, Kevin Johnson2, Jean H. Brittain3, Scott B. Reeder1, 2

1Department of Radiology, University of Wisconsin, Madison, WI, United States; 2Department of Medical Physics, University of Wisconsin, Madison, WI, United States; 3Global Applied Science Laboratory, GE Healthcare, Madison, WI, United States

The purpose of this work was to develop a spectrally-resolved, fully phase-encoded 3D fast spin-echo technique that eliminates all frequency-encoding-related shift artifacts and permits spectral data sampling at each spin-echo. A sphere containing gadolinium was placed in water and imaged with both this method and conventional 3D-FSE. Signal modeling produced distortion-free proton density and B0 maps with the proposed method, in contrast to the conventional 3D-FSE images. Dipole effects were also visible both in the estimated B0 map and the spectroscopic images. Lastly, a hip prosthesis was well visualized without distortion while conventional 3D-FSE demonstrated severe distortion artifacts.