MRI Coils Optimized for Detection of 1H and 23Na at 0.5 T
MRI Coils Optimized for Detection of 1H and 23Na at 0.5 T
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DOI：
10.1007/s00723-020-01306-x
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发表时间：
2021-01-14
影响因子：
1
通讯作者：
Pirogov, Yu. A.
中科院分区：
文献类型：
--
作者：
Anisimov, N. V.;Tarasova, A. A.;Pirogov, Yu. A.
质子和钠MRI在0.5 T的实验进行了描述，以评估各种类型的线圈，即螺线管，表面，体积，并具有特定的复杂的几何形状的灵敏度。每种类型的线圈，其特征在于其几何特异性，建立记录质子（H-1）和钠（Na-23）的MR信号，分别在21.1 MHz和5.6 MHz。钠线圈最初是针对H-1 MRI构建的，并针对Na-23 MRI进行了修改。在装有12%盐溶液的容器体模中进行的测量表明，各种类型线圈的品质因数和灵敏度在钠和质子共振频率下大致一致。被认为是一个高度集中的样品和Q-因子测量的SNR上的数据来预测MRI结果的可能性弱集中的样品。这些测量值代表了扩展到多核全身低场MRI临床平台的指南，该平台通常设计为仅在质子模式下运行。
Experiments on proton and sodium MRI at 0.5 T are described to assess the sensitivity of various types of coils, namely solenoidal, surface, volumetric, and with specific complex geometry. Each type of coil, characterized by its geometric specificity, was built to record MR signal of protons (H-1) and sodium (Na-23) at 21.1 MHz and 5.6 MHz, respectively. Sodium coils were initially built for H-1 MRI and modified for Na-23 MRI. Measurements in a container phantom filled with a 12% salt solution showed that the quality factor and sensitivity of various type coils approximately coincide at both sodium and proton resonance frequencies. The possibility of using data on SNR for a highly concentrated sample and Q-factor measurements to predict MRI results for a weakly concentrated sample is considered. These measurements represent a guide for extension to multinuclear whole body low field MRI clinical platform that is usually designed to operate in proton mode only.