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MRI Coils Optimized for Detection of 1H and 23Na at 0.5 T
Applied Magnetic Resonance ( IF 1 ) Pub Date : 2021-01-14 , DOI: 10.1007/s00723-020-01306-x
N. V. Anisimov , A. A. Tarasova , O. S. Pavlova , D. V. Fomina , A. M. Makurenkov , G. E. Pavlovskaya , Yu. A. Pirogov

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 ( 1 H) and sodium ( 23 Na) at 21.1 MHz and 5.6 MHz, respectively. Sodium coils were initially built for 1 H MRI and modified for 23 Na 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.

中文翻译:

为检测 0.5 T 时的 1H 和 23Na 而优化的 MRI 线圈

描述了 0.5 T 质子和钠 MRI 的实验,以评估各种类型线圈的灵敏度,即螺线管、表面、体积和具有特定复杂几何形状的线圈。每种类型的线圈都以其几何特异性为特征,分别用于记录质子 ( 1 H) 和钠 ( 23 Na) 的 MR 信号,频率分别为 21.1 MHz 和 5.6 MHz。钠线圈最初是为 1 H MRI 构建的,并针对 23 Na 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上大致一致。考虑使用高浓度样本的 SNR 数据和 Q 因子测量来预测弱浓度样本的 MRI 结果的可能性。
更新日期:2021-01-14
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