Safely Detecting Device Coupling Using Reversed RF Polarization and Pre-Spoiled EPI

William Overall¹, Pascal Stang¹, John Pauly¹, Greig Scott¹

The degree of coupling present in long-wire implants can be quantified by reversing the RF receiver polarization. To assess device coupling in patients with potentially dangerous implants, a four-shot projection EPI sequence may be used safely given reasonable assumptions. Image quality and reliability can be improved by adding a small pre-spoiler gradient to suppress imperfections due to electrodynamic effects.