一种用于低场磁共振波谱仪的圆极化线圈设计

汤世豪, 杨谨毓, 徐雅洁, 王亚, 彭博文, 高宇昊, 杨晓冬

A Design of Circularly Polarized Coil for Low-field Nuclear Magnetic Resonance Spectrometers

TANG Shihao, YANG Jinyu, XU Yajie, WANG Ya, PENG Bowen, GAO Yuhao, YANG Xiaodong

图13 单通道线圈与圆极化线圈测得的1H NMR谱图. 蓝色曲线为单通道90˚脉冲鞍形线圈测得1H NMR信号；红色曲线为单通道90˚脉冲亥姆霍兹线圈测得1H NMR信号；绿色和粉色曲线分别为圆极化线圈90˚和450˚脉冲测得1H NMR信号

Fig. 13 The figure compares 1H NMR spectra acquired using different coil configurations. The blue curve represents the 1H NMR signal measured with a single-channel saddle coil using a 90˚ pulse. The red curve shows 1H NMR data obtained from a single-channel Helmholtz coil with identical 90˚ pulse excitation. In contrast, the green and magenta curves display 1H NMR signals acquired with circularly polarized (CP) coils employing 90˚ and 450˚ pulse excitations respectively