1. A high-Q metasurface signal isolator for 1.5T surface coil magnetic resonance imaging on the go
- Author
-
Ren, Qun, Lang, Yuxin, Ja, Yuqi, Xiao, Xia, Liu, Yu, Kong, Xiangzheng, Jin, Ruiqi, He, Yongqing, You, Jianwei, Sha, Wei, and Pang, Yanwei
- Subjects
Physics - Medical Physics - Abstract
The combination of surface coils and metamaterials remarkably enhance magnetic resonance imaging (MRI) performance for significant local staging flexibility. However, due to the coupling in between, impeded signal-to-noise ratio (SNR) and low-contrast resolution, further hamper the future growth in clinical MRI. In this paper, we propose a high-Q metasurface decoupling isolator 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 a polarization conversion mechanism to effectively eliminate the coupling between the MRI metamaterial and the radio frequency (RF) surface transmitter-receiver coils. Furthermore, a high-Q metasurface isolator was achieved by taking advantage of bound states in the continuum (BIC) for extremely high-field MRI and spectroscopy. An equivalent physical model of the miniaturized metasurface design was put forward through LC circuit analysis. This study opens up a promising route for the easy-to-use and portable surface coil MRI scanners.
- Published
- 2023