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Abstract #2516

Fluid-Sensitive Metal Artifact Reduction using a 3D-Composite Fast Steady State Free Precession (COFIsp) sequence

Xeni Deligianni 1,2 , Thomas Egelhof 2 , Thorsten Wischer 2 , Reinhard Elke 2 , and Oliver Bieri 1

1 Radiology, Division of Radiological Physics, University of Basel Hospital, Basel, NA, Switzerland, 2 Merian Iselin Klinik, Basel, NA, Switzerland

Magnetic resonance imaging (MRI) in the vicinity of metal hardware is stll characterized by long scan times for the acquisition of composite images and low fluid sensitivity. Here we propose an optimized composite fast steady state free precession sequence (COFIsp) as a fast, clinically feasible alternative for acquisition of fluid-sensitive and distortion-free images in the presence of metal. For distortion correction additional prephasing gradients and optimized phase encoding orientation were investigated. The sequence allows good artifact correction and high fluid contrast which is very important for the visualization of inflammation.

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