微负折射材料透镜在磁共振成像中的应用。

On the applications of micror=-1 metamaterial lenses for magnetic resonance imaging.

机构信息

Departamento de Electronica y Electromagnetismo, Universidad de Sevilla, Facultad de Fisica, Avda Reina Mercedes, 41012 Sevilla, Spain.

出版信息

J Magn Reson. 2010 Mar;203(1):81-90. doi: 10.1016/j.jmr.2009.12.005. Epub 2009 Dec 29.

DOI:10.1016/j.jmr.2009.12.005

PMID:20036589

Abstract

In this work some possible applications of negative permeability magnetic metamaterial lenses for magnetic resonance imaging (MRI) are analyzed. 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.

摘要

在这项工作中，分析了负磁导率磁性超材料透镜在磁共振成像（MRI）中的一些可能应用。结果表明，使用磁性超材料透镜可以控制磁共振系统中射频（RF）场的空间分布，并在某些情况下提高表面线圈的灵敏度。此外，还介绍了 RF 场的准直现象，这一现象可能在并行成像中得到应用。为了证明理论分析对于实际应用的适用性，展示了真实组织的磁共振图像。