Optimization of torque-balanced asymmetric head gradient coils
Optimization of torque-balanced asymmetric head gradient coils
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DOI：
10.1002/mrm.1910350614
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发表时间：
1996-06-01
影响因子：
3.3
通讯作者：
Connick, TJ
中科院分区：
文献类型：
--
作者：
Alsop, DC;Connick, TJ
Local gradient coils can improve the performance of echo-planar, diffusion, and short TE imaging in the brain, A modified singular value decomposition algorithm, which allows the rapid optimization and comparison of designs, was employed to optimize head size gradient coils, A theoretical expression for the torque on a cylindrical coil is presented and used to design coils that are free from torque while pulsed within a magnetic field, Gradient coils of various lengths both with and without torque constraints were compared; although torque-free coils do not perform as well as unbalanced coils, asymmetric torque-balanced coils can achieve comparable homogeneity with only a modest increase in inductance and resistance, Both types of coils outperform body size gradient coils by a dramatic margin, A three-axis head gradient designed using these techniques was constructed and used for brain imaging on a clinical scanner.
