Acoustic cardiac triggering: a practical solution for synchronization and gating of cardiovascular magnetic resonance at 7 Tesla. - Frauenrath, Tobias; Hezel, Fabian; Renz, Wolfgang; de Geyer d'Orth, Thibaut; Dieringer, Matthias; von Knobelsdorff-Brenkenhoff, Florian; Prothmann, Marcel; Menger, Jeanette Schulz; Niendorf, Thoralf (Journal of Cardiovascular Magnetic Resonance (Elsevier B.V. ), 2010)