Meeting Banner
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.

Abstract PDF Poster PDF

Keywords

ability acceleration accurate acquisition addition agree anticipate applied artifact artifacts averaging avoiding ball basis bins challenge clearly clinically closely coded coil collected color combined compatible compressed contain corner cutting decomposition density depicted detailed develop developed dimensions dipole displayed distinct distortion dramatically effective eliminates enabling encoded encoding entirely excitation extended facilitating fast feasibility fitting frequency fully gradient gratefully great hard head highly improving included incorporate independent inherent inhomogeneity knowledge laboratory largest limited many maps matrix measured medical metal minimal minimize model modeled modulated near needed offset optimizing options parallel partial pattern performance permits phantom physics ping potential preliminary promising proposed prosthesis proton pulse pulses radiology readout recent reduced reduction reeder refocusing related remaining resolution resolved retrospectively sample sampled samples sampling scheme selected sensing solution space spatial species spectral spectrally spectroscopic sphere spin spins spirit squares successfully suffers summed support temporally thread titanium train trains unique unlike useful variable water wide yielding yields