发明名称 MAGNETIC FIELD HOMOGENEITY CONTROL USING A PLURALITY OF SUB-COILS CONNECTED IN SERIES AND OPERATING AT VARIOUS CURRENTS
摘要 Magnetic resonance apparatus comprises a magnet for generating, in a working region, a magnetic field of sufficient homogeneity to permit magnetic resonance signals to be obtained from a target material in the working region when in use. The magnet has a plurality of coils (100, 101, 102...), wherein at least one of the plurality of coils comprises a plurality of subcoils (200, 201...) arranged adjacent one another. Each of the coils and subcoils are connected in series. A common current supply (105) is arranged to supply a common current to each coil and each subcoil of the magnet. At least one auxiliary current supply (400, 401...) is arranged to supply auxiliary currents to each of the subcoils and a controller is adapted to set the respective auxiliary currents within the subcoils, so as to control the effective geometry and/or position of the coil(s) formed from the subcoils.
申请公布号 WO2005081008(A3) 申请公布日期 2005.10.06
申请号 WO2005GB00366 申请日期 2005.02.03
申请人 OXFORD INSTRUMENTS PLC;MCDOUGALL, IAN, LEITCH;HANLEY, PETER 发明人 MCDOUGALL, IAN, LEITCH;HANLEY, PETER
分类号 G01R33/3815;G01R33/387;G01R33/3875 主分类号 G01R33/3815
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