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    • 68. 发明授权
    • MR signal transmission in a local coil arrangement
    • 局部线圈布置中的MR信号传输
    • US08487622B2
    • 2013-07-16
    • US12893286
    • 2010-09-29
    • Stephan BiberJan BollenbeckMarkus Vester
    • Stephan BiberJan BollenbeckMarkus Vester
    • G01V3/00
    • G01R33/3692G01R33/341G01R33/3415G01R33/3621G01R33/422
    • In a magnetic resonance tomography local coil arrangement and a method for processing signals received thereby, at least one local coil is fashioned to receive at least one reception signal and at least one amplifier is provided that amplifies the at least one reception signal. A frequency converter generates at least one intermediate frequency signal from the at least one reception signal the intermediate frequency of the intermediate frequency signal differing from the reception signal frequency of each reception signal. An analog-digital converter converts the analog intermediate frequency signal into a digitized signal. A shielding device shields against at least radio-frequency signals, the shielding device surrounding at least the analog-digital converter. At least one frequency filter is arranged between the at least one local coil and the analog-digital converter, the frequency filter exhibiting a transmission range for signals with the intermediate frequency of an intermediate frequency signal. The digitized signal is transmitted from the local coil arrangement.
    • 在磁共振断层摄影局部线圈装置和用于处理由此接收的信号的方法中,形成至少一个局部线圈以接收至少一个接收信号,并且提供放大至少一个接收信号的至少一个放大器。 变频器从至少一个接收信号产生至少一个中频信号,该中频信号与每个接收信号的接收信号频率不同。 模拟数字转换器将模拟中频信号转换为数字化信号。 屏蔽装置至少屏蔽射频信号,屏蔽装置至少围绕模拟数字转换器。 在至少一个本地线圈和模数转换器之间布置至少一个频率滤波器,该频率滤波器对于具有中频信号的中频的信号呈现传输范围。 数字化信号从本地线圈装置发送。
    • 69. 发明申请
    • Balancing Out a Field Inhomogeneity in a Magnetic Resonance Tomography System and Shim Coil Arrangement
    • 在磁共振层析成像系统和Shim线圈布置中平衡场不均匀性
    • US20130134978A1
    • 2013-05-30
    • US13689339
    • 2012-11-29
    • Stephan Biber
    • Stephan Biber
    • G01R33/3875
    • G01R33/3875
    • In order to balance out a field inhomogeneity, a value for a coil current is determined by a controller as a function of an item of information relating to the field inhomogeneity and an item of information relating to a position of at least one balancing or shim coil arranged in the magnetic field. The value is to be supplied to the at least one shim coil in order to generate a magnetic balancing field to balance out the field inhomogeneity. A control signal for at least one shim current source and for at least one switching matrix coupling the at least one shim current source to the at least one shim coil is generated as a function of the at least one value.
    • 为了平衡场不均匀性,线圈电流的值由控制器确定为与场不均匀性有关的信息项的函数,以及与至少一个平衡或垫片线圈的位置有关的信息项 布置在磁场中。 该值将被提供给至少一个垫片线圈,以便产生磁平衡场以平衡场不均匀性。 作为至少一个值的函数,产生用于至少一个匀场电流源和至少一个将至少一个垫片电流源耦合到至少一个垫片线圈的开关矩阵的控制信号。