Figure 1

ECG (top) and ACoustic Trigger (bottom) signal traces derived from a healthy subject. Signal traces were recorded outside (left), at the front end (middle) and in the isocenter (right) of a 7.0 T magnet. Severe T-wave elevation signal distortion occurred in the ECG signal obtained at the magnet's isocenter. In contrast, ACT is free of interferences with electromagnetic fields and magneto-hydrodynamic effects.