MAGNETOSTATIC FIELD MAGNET
申请(专利)号： JP19870072734
专利号： JPS63237508A 主分类号： H01F7/20
申请权利人： YOKOGAWA
MEDICAL SYST LTD 公开国代码： JP 优先权国家： JP
摘 要：
PURPOSE:To make correction for the ununiformity of magnetic fields at the least expense by providing a plurality of chin coils so that the number of windings which are required for each shim coil of the orders O-n are filled and the windings to be useable in common are used in common and current supply means, through which an ampare-turn required for the current shim of each order is additionally supplied to each winding. CONSTITUTION:Z<n> type current shim used for a nuclear magnetic resonance tomograph is applied to a magnetostatic field magnet to make correction for the ununiformity of
magnetic fields. A plurality of shim coils where the number of windings which are required for each shim coil of the orders O-n are filled and the windings to be usable in common are used in common as well as current supplying means which are equal to the number of windings,
申请日： 1987-03-26 公开公告日： 1988-10-04
分类号： H01F7/20;
A61B5/055; A61B10/00; G01R33/385 发明设计人： MIURA NOBUYUKI;
INOUE YUJI 申请国代码： JP
优先权： 19870326 JP
7273487
摘 要 附 图：
through which an ampare-turn required for the current shim of each order is
additionally supplied to each winding are provided. In the case of an even order shim coil, ampare-turn AT1 is given by connecting a power source to left and right ends of Z<1>1 winding 1 and ampare- turn AT2 is given by connecting the power source to left and right ends of Z<3>2 winding 3. This approach not only economizes the steps by reducing the required pairs of coils but also economizes the amount of a working current by curtailing the required number of power source devices and then makes it possible to obtain a magnetostatic field magnet using inexpensive shim coils. 主权项：
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MAGNETOSTATIC FIELD MAGNET
