Lee S Y, Park B S, Yi J H, Yi W
Department of Biomedical Engineering, College of Medicine, Konkuk University, Choongbuk, Korea.
Magn Reson Med. 1997 Nov;38(5):858-61. doi: 10.1002/mrm.1910380525.
Gradient coil inductance has been remarkably reduced by the minimum-inductance design technique, which minimizes the magnetic energy stored by the gradient coil. The planar gradient coil designed by this technique, however, often has poor magnetic field linearity. Scaling the spatial frequencies of the current density function derived by this method, the magnetic field linearity of the planar gradient coil can be greatly improved with a small sacrifice of gradient coil inductance. A figure of merit of the planar gradient coil has been found to be improved by scaling the spatial frequencies.
通过最小电感设计技术，梯度线圈电感已显著降低，该技术可使梯度线圈存储的磁能最小化。然而，用这种技术设计的平面梯度线圈通常具有较差的磁场线性度。通过缩放用此方法导出的电流密度函数的空间频率，平面梯度线圈的磁场线性度可得到极大改善，而梯度线圈电感仅会有少量牺牲。已发现通过缩放空间频率，平面梯度线圈的品质因数会得到改善。
