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Abstract #0487

Cardiac 31P MR Spectroscopy With Interleaved 1H Image Navigation for Prospective Respiratory Motion Compensation – Initial Results

Stefan Wampl1,2, Tito Körner1,2, Sigrun Roat1,2, Michael Wolzt3, Ewald Moser1,2, Siegfried Trattnig2,4, Martin Meyerspeer1,2, and Albrecht Ingo Schmid1,2
1Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, 2MR Center of Excellence, Medical University of Vienna, Vienna, Austria, 3Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria, 4Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria

Cardiac phosphorus (31P) magnetic resonance spectroscopy (MRS) offers unique insights into the metabolism of the human heart. To further improve cardiac 31P MRS acquisitions, the implementation of a proton (1H) magnetic resonance imaging (MRI) navigator into a 31P MRS pulse sequence using multinuclear interleaving is demonstrated. In this feasibility study we further apply a method to robustly detect the heart on low-resolution navigator images. Combined with multinuclear interleaving this facilitates time-efficient position updates of the 31P MRS voxel to prospectively correct for respiratory motion.

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