Topological Metamaterial for Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is crucial in global healthcare, but the traditional receive coils, as a core component of MRI, signal‐to‐noise ratio enhancement is limited due to the optimization of channel number and magnetic field strength faces high cost and complexity challenges. Here, this work demonstrates the use of a topological material to enhance MRI signal reception. Designed with a stack of weak couplings, this material forms quasi‐two‐dimensional dual topological boundary states. High properties are achieved through low‐loss signal transmission via these topological states, as well as only enhanced local magnetic fields and an increased number of channels. Initial tests demonstrate superior performance and accessibility compared with commercial coils, suggesting significant potential. This concept introduces a transformative paradigm for all MRI coil designs.