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首页> 外文期刊>IEEE Transactions on Magnetics >3-D FEM Analysis of Residual Magnetism Produced by x-Gradient Coil of Permanent Magnet Type of MRI
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3-D FEM Analysis of Residual Magnetism Produced by x-Gradient Coil of Permanent Magnet Type of MRI

机译：MRI永磁型x梯度线圈产生的剩磁的3-D有限元分析

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摘要

The detailed analysis of residual magnetization in permanent magnet type of magnetic resonance imaging (MRI) is important for the improvement of MRI image. The behavior of residual magnetization produced by the $z$-gradient coil is already reported. As 3-D analysis is strictly required for investigating the residual magnetization produced by the $x$- or $y$-gradient coil, the report about such a behavior is few. In this paper, the minor loop and residual magnetization produced by the $x$-gradient coil in a 3-D model are examined. The useful knowledge for understanding the behavior of the disturbance field due to the residual magnetization in the pole piece, etc., is obtained.
机译：永磁型磁共振成像（MRI）中剩余磁化的详细分析对于改善MRI图像很重要。已经报道了由$ z $梯度线圈产生的剩余磁化行为。由于必须严格进行3-D分析来研究由$ x $或$ y $梯度线圈产生的剩余磁化强度，因此有关这种行为的报道很少。在本文中，研究了3-D模型中$ x $梯度线圈产生的次要环路和剩余磁化强度。获得了有用的知识，用于理解由极靴等中的剩余磁化强度引起的干扰场的行为。

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