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阐述了MRI射频线圈的工作原理,指出与梯度线圈、主线圈的本质区别在于前者工作于谐振状态,而后者工作于非谐振状态。因此,RF线圈必须构成驻波谐振器。需经历调谐、阻抗匹配等步骤。阐述了鸟笼式谐振器正交工作原理和开鸟笼正交谐振器的可行性,给出了正交相位阵列方案。
The working principle of MRI RF coil is expounded. The essential difference between gradient coil and main coil is that the former works in the resonance state while the latter works in the non - resonance state. Therefore, the RF coil must constitute a standing wave resonator. Need to go through tuning, impedance matching and other steps. The orthogonal working principle of birdcage resonator and the feasibility of birdcage orthogonal resonator are expounded. The scheme of quadrature phase array is given.