Meeting Banner
Abstract #1233

Is Phonocardiogram Gating a Reliable Alternative to ECG Gating in Clinical Routine for CINE and Velocity-Encoded Phase Contrast Imaging?

Stefan Maderwald1, Stephan Orzada2, 3, Lars Haering4, Andreas Czylwik4, Thomas Schlosser3, Mark E. Ladd1, 3, Kai Nassenstein, 23

1Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen , Essen, Germany; 2Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany; 3Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany; 4Department of Communication Systems, University Duisburg-Essen, Essen, Germany

In this study an in-house developed phonocardiogram (PCG) gating device was used to validate the diagnostic accuracy of acoustic triggered sequences in a clinical routine protocol at 1.5T. PCG- and ECG-gated cine imaging sequences for the assessment of LV global and regional function as well as velocity-encoded phase-contrast imaging sequences for flow quantification were compared. 147 consecutive patients were enrolled and evaluated. PCG-gated imaging was successful in 95%, ECG-gated in 100% of all patients. With cine imaging an excellent correlation between PCG and ECG was observed, whereas flow quantification measurements showed a wide limit of agreement for all variables analyzed.