Abstract #3896

Knee MRI Using a Wireless and Passive Metasurface Coil

Yi Yi¹, Zhonghai Chi², Yakui Wang¹, Maopeng Wu², Lixue Wang¹, Deqing Jiang¹, Li He¹, Xihai Zhao³, Yonggang Meng², Ji Zhou⁴, Qian Zhao², and Zhuozhao Zheng¹

¹Department of Radiology, Beijing Tsinghua Changgung Hospital, School of Medicine, Tsinghua University, Beijing, China, ²State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, China, ³Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, ⁴State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China

Synopsis

Keywords: New Devices, Non-Array RF Coils, Antennas & Waveguides, Metasurface

Metasurface is an effective solution to enhance SNR of MRI images. Here, we propose a wireless and passive metasurface coil and evaluate its performance in knee MRI. Phantom studies suggest improved image uniformity compared to the conventional phased-array radio-frequency coils. In vivo knee MRI of volunteers suggests higher image quality scores and better contrast of knee cartilage in metasurface groups. When used in conjunction with the spine coil, the metasurface coil provides a favorable SNR between that of the 4- and 12-channel phased-array coil. It is more convenient, cost-effective, and applicable to 1.5T MRI systems from different manufacturers.

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