Magnetically induced surface charges on samples in magnetic resonance imaging radio-frequency coils: effect on electric fields, sample losses, and coil resonance.
Magnetically induced surface charges on samples in magnetic resonance imaging radio-frequency coils: effect on electric fields, sample losses, and coil resonance.
复制标题
磁共振成像射频线圈中样品上的磁感应表面电荷：对电场、样品损耗和线圈谐振的影响。
DOI：
10.1118/1.596516
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发表时间：
1990
期刊：
影响因子：
3.8
通讯作者：
Harpen,MD
中科院分区：
文献类型：
--
作者：
Harpen,MD
我们提出了一个解决方案，麦克斯韦方程描述的不规则形状的样品之间的磁共振成像射频线圈的感应相互作用。它表明，线圈和样品之间的感应相互作用可以在样品表面上感应电荷密度，这些电荷密度导致可观察到的变化coilQ，谐振频率偏移和样品功耗。
We present a solution to Maxwell's equations which describe the inductive interaction between an irregularly shaped sample in a magnetic resonance imaging rf coil. It is demonstrated that the inductive interaction between the coil and sample can induce charge densities on the sample surface and that these charge densities lead to observable changes in coilQ, resonant frequency offset and sample power dissipation.