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Abstract #0644

From Artifact to Merit: Cardiac Gated MRI at 7T & 3T using Magneto-Hydrodynamic Effects for Synchronization

Tobias Frauenrath1, Matthias Dieringer1,2, Nishant Patel1, Celal zerdem1, Jan Hentschel1, Wolfgang Renz1,3, Thoralf Niendorf1,2

1Berlin Ultrahigh Field Facility, MDC Berlin, Berlin, Germany; 2Charit Campus Buch, Humboldt-University, Experimental & Clinical Research Center (ECRC), Berlin, Germany; 3Siemens Healthcare, Erlangen, Bayern, Germany

ECG is corrupted by magneto-hydrodynamic effects at higher magnetic field strength. Artifacts in the ECG trace and severe T-wave elevation might be mis-interpreted as R-waves. MHD being inherently sensitive to blood flow and blood velocity provides an alternative approach for cardiac gating, even in peripheral target areas far away from the commonly used upper torso positions of ECG electrodes. This feature would be very beneficial to address traveling time induced motion artifacts and trigger latency related issues raised by ECG-gated peripheral MR angiography. For all those reasons, this work proposes the use of MHD-trigger for cardiac gated MR.