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    • 6. 发明申请
    • DETUNING A MRT RECEIVE ANTENNA
    • 拆除地铁接收天线
    • US20160320465A1
    • 2016-11-03
    • US15131201
    • 2016-04-18
    • Klaus HuberRobert RehnerMarkus Vester
    • Klaus HuberRobert RehnerMarkus Vester
    • G01R33/36
    • G01R33/3657G01R33/341
    • An arrangement for detuning a receive antenna, a detunable magnetic resonance coil, and a magnetic resonance device having a detunable magnetic resonance coil are provided. The arrangement includes a receive antenna having at least one first capacitance, wherein radiofrequency signals from a magnetic resonance examination may be received by way of the receive antenna. The arrangement furthermore includes a switchable detuning circuit containing the first capacitance switched to form an oscillating circuit and a first inductance, and a switching device having a first and a second connection point to deliver a voltage between the first and a second connection point, and one or more transistors. The switching device switches the oscillating circuit to a high impedance level with aid of the one or more transistors on delivery of a positive voltage to the first connection point, preventing a radiofrequency signal from being received by way of the receive antenna.
    • 提供了一种用于使接收天线失谐的装置,不可恢复的磁共振线圈和具有不可恢复的磁共振线圈的磁共振装置。 该装置包括具有至少一个第一电容的接收天线,其中可以通过接收天线接收来自磁共振检查的射频信号。 该装置还包括可切换的失谐电路,其包含切换以形成振荡电路的第一电容和第一电感,以及具有第一和第二连接点以在第一和第二连接点之间传递电压的开关装置,以及一个 或更多的晶体管。 开关装置在将正电压传送到第一连接点的同时,通过一个或多个晶体管的帮助将振荡电路切换到高阻抗水平,防止射频信号通过接收天线被接收。