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。
Furthermore, the gradient coils' design for the newly proposed permanent MRI system is a special inverse problem of electromagnetic field.
对于上述新型永磁mri系统，梯度线圈的设计更是一个特殊的电磁场逆问题。
Objective Gradient coils of the intraoperative MRI system developed in recent years are required for low inductance and high coil efficiency.
目的近年来出现的新型术中MRI系统对于梯度线圈提出了很高的要求，尤其重要的是低电感和高效率。
A magnetic resonance imaging scanner (10) includes a main magnet (12), magnetic field gradient coils (16), and one or more radio frequency coils (18).
一种磁共振扫描器(10)包括主磁体(12)、磁场梯度线圈(16)和一个或多个射频线圈(18)。
A general method for designing magnetic field gradient coils on a cylindrical surface with an axial magnetic field to be used in NMR imaging is suggested and developed.
系统地介绍了用于磁共振成像系统中具有轴向磁场的圆柱型表面梯度线圈的设计与优化。
To avoid the generation of the noise, the design method of balanced Lorentz force gradient coils is studied and the gradient coils with cacelled net thrust force are designed.
为了解决这一问题，本文研究了减少噪声的力平衡梯度线圈的设计方法，并完成了洛伦兹力近似为零的线圈设计。
The promising results presented here could strongly influence practices in the design, manufacturing and use of the main magnet and gradient coils for direct Fourier MR imaging.
这些结果将对直接傅里叶成像中所用的电磁铁和梯度线圈的设计与制造有一定的意义。
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.
为了尽可能地减小涡流的影响，本文研究了自屏蔽线圈的设计方法，并完成了一种涡流自屏蔽单平面梯度线圈的设计。
The gradient amplifier is an essential equipment of Magnetic Resonance Imaging system (MRI). It supplies the gradient coils with pulse currents according to the signal from the control system.
梯度放大器是核磁共振成像(MRI)系统的核心设备之一，它根据前级控制系统传来的指令，向梯度线圈提供特定波形的电流脉冲。
RRI's product line includes high performance gradient and shim coils, high stability shim power supplies, gradient amplifiers, magnetic field management and consulting on magnetics.
RRI的产品线包括高性能梯度和填充线圈，高稳定性电源，梯度放大器，磁场管理和电磁学咨询。
RRI's product line includes high performance gradient and shim coils, high stability shim power supplies, gradient amplifiers, magnetic field management and consulting on magnetics.
RRI的产品线包括高性能梯度和填充线圈，高稳定性电源，梯度放大器，磁场管理和电磁学咨询。
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