发明名称 |
Gradient coil system for use in MRI apparatus with unique wiring arrangement |
摘要 |
In order to obtain good linearity without reducing efficiency in generating a magnetic field, a winding pattern of one semicircular spiral is assumed; an electric current distribution is expressed by a continuous function Jx(x) such that an x-axis electric current distribution profile does not lie in both the positive and negative polarities; parameters of the continuous function Jx(x) are optimized so that desired linearity can be obtained; and a position of a straight-line portion 1Xt1L of the semicircular spiral is determined so that the electric current distribution profile given by the optimized continuous function Jx(x) is fulfilled. The resulting pattern is symmetrically duplicated to generate a gradient coil unit 1Xt, and a plurality of the gradient coil units 1Xt are combined to form a gradient coil.
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申请公布号 |
US6529003(B2) |
申请公布日期 |
2003.03.04 |
申请号 |
US20000546223 |
申请日期 |
2000.04.10 |
申请人 |
GE YOKOGAWA MEDICAL SYSTEMS, LIMITED |
发明人 |
GOTO TAKAO;INOUE YUJI |
分类号 |
A61B5/055;G01R33/385;(IPC1-7):G01V3/00 |
主分类号 |
A61B5/055 |
代理机构 |
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