论文标题
带有可变谐振频率的RF线圈，用于多核超高场MRI
RF-coil with variable resonant frequency for multiheteronuclear ultra-high field MRI
论文作者
论文摘要
在这里，我们提出双层型线圈设置，以允许高信噪比宽范围的异核磁共振成像实验：两个独立的线圈，其中一个调谐到$^{1} $ h频率以执行解剖学$^{1} $ h成像，以及另一个，又一个，一个，一个，一个，一个，一种，一个，一个，一种，一个，一种，一个，含量为x-nuc的x-nuce频率。在这项工作中，我们的目标是设计一个宽范围的X-Nuclei线圈，以覆盖$^{2} $ h，$^{11} $ b，$^{13} $ c，$^{23} $ na，$^{7} $ li and $^{31} $^{31} $ p核磁共振频率，并与$^^$^^^1}组合。该系统是为11.7 t扫描仪设计的，即X-Nuclei的76-203 MHz频率调整范围，并调整为质子线圈的500 MHz。 X-Nuclei线圈是通过激发一系列平行非磁线的基本本本特征模式的。阵列的激发是通过向谐振器耦合的非谐振进料环提供的。为了在如此宽的范围内调整X线圈，使线圈的结构电容和电感都变化。 $^{1} $ h线圈的狭窄范围调整是通过常规调整匹配电路实现的。在这里，在模拟中研究了设计原理和设置可调节性，并在实验中进行了研究。
Here we propose double-coil setup to allow high signal-to-noise ratio broad-range heteronuclear magnetic resonance imaging experiments: two independent coils, one of them tuned to $^{1}$H frequency to perform anatomical $^{1}$H imaging, and another one, metamaterial-inspired coil, tuned to the X-nucleus frequency. In this work our goal was to design a broad-range X-nuclei coil to cover $^{2}$H, $^{11}$B, $^{13}$C, $^{23}$Na, $^{7}$Li and $^{31}$P nuclear magnetic resonance frequencies, and to combine it with $^{1}$H coil in one setup. The system was designed for 11.7 T scanner, i.e., with 76-203 MHz frequency tuning range for the X-nuclei and tuned to 500 MHz for the proton coil. X-nuclei coil operates via excitation of the fundamental eigenmode of an array of parallel non-magnetic wires. The excitation of the array is provided via non-resonant feeding loop inductively coupled to the resonator. In order to tune the X-coil over such a wide range, both structural capacitance and inductance of the coil were made variable; narrow range tuning of the $^{1}$H coil is achieved via conventional tuning-matching circuit. Here, the design principle and setup tunability were investigated in simulations and experimentally.
