mu=-1超材料透镜在磁共振成像中的应用
On the applications of mu=-1 metamaterial lenses for magnetic resonance imaging
摘要：
在这项工作中，负磁导率磁超材料透镜的磁共振成像（MRI）的一些可能的应用进行了分析。超材料是一种人造复合材料，设计成具有给定的介电常数和/或磁导率，包括这些常数的负值。它示出，使用磁性超材料透镜，它是可能的，以操纵的空间分布的射频（RF）领域中使用的MR系统，并在某些情况下，提高表面线圈的灵敏度。此外，射频场的准直，现象，可能会发现在并行成像中的应用，提出。真实组织的MR图像，以证明理论分析的适用性，为实际应用。
英文摘要：
In this work some possible applications of negative permeability magnetic metamaterial lenses for magnetic resonance imaging (MRI) are analyzed. Metamaterials are artificial composites designed to have a given permittivity and/or permeability, including negative values for these constants. It is shown that using magnetic metamaterials lenses it is possible to manipulate the spatial distribution of the radio-frequency (RF) field used in MR systems and, under some circumstances, improve the sensitivity of surface coils. Furthermore a collimation of the RF field, phenomenon that may find application in parallel imaging, is presented. MR images of real tissues are shown in order to prove the suitability of the theoretical analysis for practical applications.
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