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Abstract #3213

Fast self-navigated PC-MRI for human cardiac flow measurements using retrospective radial sampling

Patrick Winter1, Kristina Andelovic2, Peter Jakob1,3, Wolfgang Bauer2, and Volker Herold1

1Experimentelle Physik V, Universität Würzburg, Würzburg, Germany, 2Medizinische Klinik und Poliklinik I des Universitätsklinikums Würzburg, Würzburg, 3Fraunhofer IIS, Fraunhofer EZRT, Magnetresonanz- und Röntgenbildgebung (MRB)

A self-navigated radial PC-MRI sequence is presented for fast ECG-free 2D-Cine measurements with 3-dimensional flow encoding. The radial DC signal was used for retrospective self-navigation. Reconstructions were performed with an iterative CG-Sense algorithm. For each flow encoding step 2D-Cines with 30 frames, respectively, and a spatial resolution of 2.34 mm were reconstructed. The time-dependent volume flow through the pulmonary artery was quantified and the blood flow through the ventricles was visualized. The proposed method does not rely on ECG signals and is immune to distortions often observed with conventional triggering. It hence yields high potential for clinical applications.

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