Abstract #4227

Retrospective Phase-Based Gating for Cardiac Proton Spectroscopy with Fixed Scan Time

Mareike Gastl^1,2,3, Sophie M Peereboom¹, Maximilian Fuetterer¹, Florian Boenner⁴, Malte Kelm⁴, Robert Manka^1,2,5, and Sebastian Kozerke¹

¹Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland, ²Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland, ³Department of Cardiology, Pneumology and Angiology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany, ⁴Department for Cardiology, Pneumology and Angiology, Heinriche Heine University Düsseldorf, Düsseldorf, Germany, ⁵Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland

Respiratory motion is a major limiting factor for the application of cardiac proton MR spectroscopy (MRS) in clinical settings. Prospective navigator gating is frequently applied to minimize respiratory motion effects. However, scan durations are subject-dependent and hence difficult to predict. The present work describes cardiac proton MRS with fixed scan time employing retrospective phase-based gating. It is demonstrated that, relative to prospective navigator gating, the phase-based gating approach provides comparable triglyceride-to-water ratios with predictable scan time.

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