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Field-Simulation Based Engineering of RF Antenna Probes with Non-Uniform Substrates for High-Field Magnetic Resonance Imaging Systems

机译:用于高场磁共振成像系统的具有非均匀基板的RF天线探头的基于场模拟的工程

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摘要

It is proposed to replace RF volume coils in high-field Magnetic Resonance Imaging (MRI) scanners by a microstrip patch antenna system. The performed computational studies have demonstrated an opportunity to form extended 3D volumes of homogenous RF magnetic fields by using a system of placed vis-a-vis two patch antennas. In order to control antenna dimensions and homogeneity of antenna near fields, the substrates of antennas have been engineered by appropriate patterning of high permittivity dielectric inserts. A variety of antennas with engineered substrates responding at 600 MHz for application in 14T MRI scanners have been designed, and the homogeneity of magnetic fields achieved inside the antenna system has been demonstrated.
机译:建议用微带贴片天线系统代替高场磁共振成像(MRI)扫描仪中的RF体积线圈。进行的计算研究表明,通过使用相对于两个贴片天线放置的系统,可以形成扩展的3D体积的均匀RF磁场。为了控制天线尺寸和天线近场的均匀性,已经通过对高介电常数电介质插件进行适当的构图来设计天线的基板。已经设计出了多种具有工程衬底的天线,这些天线可以在14T MRI扫描仪中以600 MHz响应,并且已经证明了天线系统内部实现的磁场均匀性。

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