Eddy currents will be caused in ambient conducting parts because of the rapid switch speed of current pulse in gradient coils.
梯度线圈中的脉冲电流具有很高的切换速度，这必然会在周围导电部件中引起涡流。
2
The desired fast rise of the gradient magnetic filed is suppressed by the eddy currents so that the imaging process is affected.
这种涡流将抑制梯度磁场的快速变换，从而防碍正常的成像过程。
3
To diminish the influence of the eddy currents, the design method of self-shielded gradient coils is studied and the self-shielded uniplanar gradient coils are designed in this paper.