Metamaterial-enhanced magnetic resonance imaging:a review  

作　　者：Zhiwei Guo Yang Xu Shengyu Hu Yuqian Wang Yong Sun Hong Chen 

机构地区：[1]Tongji University,School of Physics Science and Engineering,MOE,Key Laboratory of Advanced Micro-Structure Materials,Shanghai,China

出　　处：《Advanced Photonics Nexus》2024年第5期1-20,共20页先进光子学通讯（英文）

基　　金：supported by the National Key R&D Program of China(Grant Nos.2021YFA1400602 and 2023YFA1407600);the National Natural Science Foundation of China(Grant Nos.91850206,12374294,and 12004284);the Chenguang Program of Shanghai(Grant No.21CGA22).

摘　　要：Magnetic resonance imaging(MRI),as a noninvasive and powerful method in modern diagnostics,has been advancing in leaps and bounds.Conventional methods to improve MRI based on increasing the static magnetic field strength are restricted by safety concerns,cost issues,and the impact on patient experience;as such,innovative approaches are required.It has been suggested that metamaterials featuring subwavelength unit cells can be used to take full control of electromagnetic waves and redistribute electromagnetic fields,achieve abundant counterintuitive phenomena,and construct versatile devices.Recently,metamaterials with exotic effective electromagnetic parameters,peculiar dispersion relations,or tailored field distribution of resonant modes have shown promising capabilities in MRI.Herein,we outline the principle of the MRI process,review recent advances in enhancing MRI by employing the unique physical mechanisms of metamaterials,and demystify ways in which metamaterial designs could improve MRI,such as by enhancing the imaging quality,reducing the scanning time,alleviating field inhomogeneities,and increasing patient safety.We conclude by providing our vision for the future of improving MRI with metamaterials.

关 键 词：METAMATERIALS magnetic resonance imaging radio-frequency magnetic field effective parameters dispersion relations resonant modes 

分 类 号：R73[医药卫生—肿瘤]