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Abstract #5008

Cardiac Imaging at 7.0T: Comparison of Pulse Oximetry, Electrocardiogram and Phonocardiogram Triggered 2D CINE for Left Ventricular Function Assessment

Tobias Frauenrath1, Fabian Hezel1, Wolfgang Renz2, Florian von Knobelsdorff-Brenkenhoff3, Thibaut de Geyer dOrth1, Marcel Prothmann3, Matthias Dieringer1, Kerstin Kretschel3, Jeanette Schulz-Menger3,4, Thoralf Niendorf1,4

1Berlin Ultrahigh Field Facility, Max-Delbrueck Center for Molecular Medicine, Berlin, Germany; 2Siemens Medical Solutions, Erlangen, Germany; 3Franz-Volhard-Klinik for Cardiology, Helios Klinikum Berlin-Buch, Charit Campus Buch, Germany; 4Experimental and Clinical Research Center (ECRC), Charit Campus Buch, Humboldt-University, Berlin, Germany

As ultrahigh field cardiac MRI becomes more widespread in the (pre)clinical research arena the propensity of ECG recordings to interference from electromagnetic fields and magneto-hydrodynamic effects increases and with it the motivation for a practical gating/triggering alternative. This study compares the feasibility, efficacy and reliability phonocardiogram (ACT), vector electrocardiogram (VCG) and traditional pulse oximetry (pO2) triggered MRI for left ventricular function assessment at 7.0T. ACTs intrinsic insensitivity to interference from electro-magnetic fields and magneto-hydrodynamic effects results in an excellent trigger reliability and renders it suitable for global cardiac function assessment at ultrahigh magnetic field strengths.