针对局部线圈激励模式和空间线圈激励模式存在的不足，根据理论分析和仿真研究提出了一种新的电磁层析成像激励系统，能方便地构成不同的激励电流分布，在此系统上实现的似平行场激励方案，可以产生较多的独立投影方向，并能获得比较均匀的灵敏度分布，改善了系统图像重建的质量 Aiming at the shortcomings of local coil excitation mode and space coil excitation mode, a new electromagnetic tomography excitation system is proposed based on theoretical analysis and simulation. Different excitation current distribution can be easily constructed. Parallel field excitation scheme can produce more independent projection direction, and can obtain a more uniform sensitivity distribution, improve the quality of the system image reconstruction