Planar Magnetic Metamaterial Slabs for Magnetic Resonance Imaging Applications
LI Chun-Lai1**, GUO Jie1, ZHANG Peng2, YU Quan-Qiang1, MA Wei-Tao1, MIAO Xi-Gen1, ZHAO Zhi-Ya1, LUAN Lin1**
1Shenzhen Key Laboratory of Optical and Terahertz Meta-RF, Kuang-Chi Institute of Advanced Technology, Shenzhen 518057 2Shenyang Aircraft Design and Research Institute, Shenyang 110035
Abstract：A type of planar magnetic metamaterial is proposed with a square winding microstructure as a superlens for magnetic resonance imaging (MRI) applications. A direct magnetic field mapping measurement demonstrates that the radio-frequency magnetic field passing through the superlens is increased by as high as 46.9% at the position of about 3 cm behind the superlens. The resonance frequency of the fabricated slabs is found to be in good agreement with the target frequency (63.6 MHz) for a 1.5 T MRI system. MRI experiments with the magnetic superlens show that the intensity of the image and the SNR (signal-to-noise ratio) are both enhanced, implying promising MRI applications of our planar magnetic superlens.
2014, Vol. 31 
