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The combination of surface coils and metamaterials remarkably enhancemagnetic resonance imaging (MRI) performance for significant local stagingflexibility. However, due to the coupling in between, impeded signal-to-noiseratio (SNR) and low-contrast resolution, further hamper the future growth inclinical MRI. In this paper, we propose a high-Q metasurface decouplingisolator fueled by topological LC loops for 1.5T surface coil MRI system,increasing the magnetic field up to fivefold at 63.8 MHz. We have employed apolarization conversion mechanism to effectively eliminate the coupling betweenthe MRI metamaterial and the radio frequency (RF) surface transmitter-receivercoils. Furthermore, a high-Q metasurface isolator was achieved by takingadvantage of bound states in the continuum (BIC) for extremely high-field MRIand spectroscopy. An equivalent physical model of the miniaturized metasurfacedesign was put forward through LC circuit analysis. This study opens up apromising route for the easy-to-use and portable surface coil MRI scanners.

A high-Q metasurface signal isolator for 1.5T surface coil magnetic resonance imaging on the go