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    • 7. 发明申请
    • ACTIVATION OF FIELD COILS OF A MAGNETIC RESONANCE SYSTEM HAVING EDDY CURRENT COMPENSATION
    • 具有EDDY电流补偿的磁共振系统的现场线圈的激活
    • US20130187653A1
    • 2013-07-25
    • US13554870
    • 2012-07-20
    • Eva EberleinRalph KimmlingenFranz SchmittJohann Schuster
    • Eva EberleinRalph KimmlingenFranz SchmittJohann Schuster
    • G01R33/54
    • G01R33/543G01R33/389
    • A controller of a magnetic resonance system determines an activation signal vector based on a target field predetermined for the controller in conjunction with field characteristics of field coils known to the controller. The activation signal vector includes a respective activation signal for each field coil. The controller determines the activation signal vector such that within a predetermined examination volume of the magnetic resonance system, any deviation of an ideal field that would result if ideal coils were subjected to the activation signals of the activation signal vector from the target field is minimized. The controller determines a compensation signal vector based on the activation signal vector in conjunction with eddy current characteristics of the field coils known to the controller. The compensation signal vector is used to minimize a deviation of an actual field from the target field within the predetermined examination volume of the magnetic resonance system.
    • 磁共振系统的控制器结合控制器已知的场线圈的场特性,基于为控制器预定的目标场确定激活信号矢量。 激活信号向量包括用于每个励磁线圈的相应启动信号。 控制器确定激活信号向量,使得在磁共振系统的预定检查体积内,如果理想线圈受到来自目标场的激活信号矢量的激活信号的任何理想场的偏差都将最小化。 控制器基于激活信号向量结合控制器已知的励磁线圈的涡流特性来确定补偿信号向量。 补偿信号矢量被用于最小化在磁共振系统的预定检查体积内的实际场与目标场的偏差。