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Abstract #1258

Accelerated 3D RARE for Positional Weight-Bearing MRI of ACJ Bone Fixation with Metal Implants

Marco Vicari 1,2 , Kaywan Izadpanah 3 , Andrea Serra 4 , Iulius Dragonu 2 , Guobin Li 2 , Maddalena Strumia 2,5 , and Juergen Hennig 2

1 Esaote S.p.A., Freiburg, Germany, 2 Dept. of Radiology, Medical Physics, University Medical Center Freiburg, Freiburg, Germany, 3 Dept. of Orthopedics and Trauma Surgery, University Medical Center Freiburg, Freiburg, Germany, 4 Esaote S.p.A., Genoa, Italy, 5 Deutsches Konsortium fr translationale Krebsforschung (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany

An interesting clinical application of MRI near metal implants consists in checking the functionality of the acromio-clavicular joint of the shoulder after treatment by bone fixation with metal plates. The overall acquisition time is usually very long, since imaging at different abduction degrees of the shoulder is required, with a quite demanding spatial resolution to allow precise quantitative evaluations. Accelerated 3D RARE imaging for open-configuration, tilting MRI scanners at low-field well suits this clinical task, since it allows, within reasonable acquisition times, positional MRI under physiological weight-bearing with sensibly less metal-induced artifacts in comparison with high-field scanners.

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