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Abstract #2689

KT-Points Pulses Reduce B1 Shading at 3T: Demonstration in Routine Abdominal DCE-MRI and Evaluation of Reliability

Raphaël Tomi-Tricot1, Vincent Gras1, Franck Mauconduit2, François Legou3, Nicolas Boulant1, Matthias Gebhardt4, Dieter Ritter4, Berthold Kiefer4, Pierre Zerbib3, Alain Rahmouni3,5, Alexandre Vignaud1, Alain Luciani3,5,6, and Alexis Amadon1

1CEA/DRF/Joliot/NeuroSpin/UNIRS, Gif-sur-Yvette, France, 2Siemens Healthcare SAS, Saint-Denis, France, 3Department of Radiology, AP-HP, CHU Henri Mondor, Créteil, France, 4Siemens Healthcare GmbH, Erlangen, Germany, 5Université Paris-Est Créteil Val-de-Marne, Créteil, France, 6INSERM Unité U955, Equipe 18, Créteil, France

At high field, MRI systems offer a higher signal-to-noise ratio, but B1+-inhomogeneity-induced artefacts in large organs can lead to shading and erroneous contrast. In this work, subject-tailored kT-points pulse design performance was evaluated in clinical routine on liver DCE-MRI at 3T, against that of patient-specific RF shimming. Both excitation homogeneity simulation and image quality assessment were performed on a variety of patients. The interest of kT-points is clearly demonstrated, as well as the reliability of the approach.

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