Analysis of the interaction between an MRI coil and a heterogeneous sample.
Analysis of the interaction between an MRI coil and a heterogeneous sample.
复制标题
分析 MRI 线圈和异质样本之间的相互作用。
DOI：
10.1088/0031-9155/36/1/012
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发表时间：
1991
影响因子：
3.5
通讯作者：
Harpen,MD
中科院分区：
文献类型：
--
作者：
Harpen,MD
磁共振成像射频线圈和异质样品之间的相互作用的理论分析，由两个导电区域由非导电膜分离。讨论了两个区域之间电容耦合的影响。表达式中的样品中的功耗和线圈的电阻抗和等效电路模型的相互作用。在这种情况下，样本功耗缺乏通常的二次频率依赖性观察均匀样本。分析结果与实验线圈样品系统的观测结果吻合良好。
A theoretical analysis of the interaction between a magnetic resonance imaging radio frequency coil and a heterogeneous sample consisting of two conducting regions separated by a non-conducting membrane is presented. The effect of the capacitive coupling between the two regions is treated. Expressions are obtained for the power dissipation in the sample and the electrical impedance of the coil and an equivalent electrical circuit which models the interaction is presented. The sample power dissipation in this case lacks the usual quadratic dependence on frequency observed with homogeneous samples. Results of the analysis are shown to agree well with observation in an experimental coil-sample system.