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    TRANSMISSION ARRANGEMENT FOR A MAGNETIC RESONANCE APPARATUS
    91.
    发明申请
    TRANSMISSION ARRANGEMENT FOR A MAGNETIC RESONANCE APPARATUS 有权
    磁性共振装置的传动装置

    公开(公告)号：US20050035762A1

    公开(公告)日：2005-02-17

    申请号：US10903643

    申请日：2004-07-30

    Applicant: Adam Albrecht ,  Horst Krockel ,  Wilfried Schnell ,  Markus Vester

    Inventor： Adam Albrecht ,  Horst Krockel ,  Wilfried Schnell ,  Markus Vester

    IPC: G01R33/36 ,  G01V3/00

    CPC classification number: G01R33/3614

    Abstract: In a transmission arrangement for a magnetic resonance apparatus, a high-frequency input signal, via an input terminal is supplied to a high-frequency power amplifier. The amplifier amplifies the input signal with from a high-frequency output signal and supplies it to an antenna arrangement that emits it as a magnetic resonance excitation signal. Directional couplers are respectively connected between the input terminal and the amplifier and between the amplifier and the antenna arrangement. The acquired signals are supplied to an amplitude controller that drives an amplitude regulator preceding the high-frequency power amplifier.

    Abstract translation: 在用于磁共振装置的传输装置中，经由输入端子的高频输入信号被提供给高频功率放大器。 放大器利用高频输出信号放大输入信号，并将其提供给发射为磁共振激励信号的天线装置。 方向耦合器分别连接在输入端子和放大器之间以及放大器和天线装置之间。 所获取的信号被提供给驱动高频功率放大器之前的幅度调节器的振幅控制器。

    Dynamics compressor for an analog signal to be compressed
    92.
    发明授权
    Dynamics compressor for an analog signal to be compressed 有权
    用于要压缩的模拟信号的动力压缩器

    公开(公告)号：US06714093B2

    公开(公告)日：2004-03-30

    申请号：US10262329

    申请日：2002-10-01

    Applicant: Ralph Oppelt ,  Markus Vester

    Inventor： Ralph Oppelt ,  Markus Vester

    IPC: H04B164

    CPC classification number: H04B1/64

    Abstract: In a dynamics compressor, an analog signal to be compressed is supplied to a first amplifier stage as an input signal, and the output signal thereof is supplied to the next amplifier stage as an input signal, and so on for a number of successive amplifier stages. Each amplifier stage amplifies its input signal with a stage amplification until it reaches a stage limit level. The analog signal and the respective output signals of the amplifier stages are summed in a summation stage to form a sum signal. Above a minimal level, the magnitude of the curve of the sum signalroughly corresponds to an exponent characteristic of the magnitude of the analog signal.

    Abstract translation: 在动态压缩器中，要被压缩的模拟信号作为输入信号被提供给第一放大器级，并且其输出信号作为输入信号提供给下一个放大器级，并且等于多个连续的放大器级 。 每个放大器级用级放大放大其输入信号，直到达到级限。 放大器级的模拟信号和各个输出信号在求和级相加以形成和信号。 高于最小电平，总和信号的曲线的大小对应于模拟信号幅度的指数特性。

    High-frequency power amplifier
    93.
    发明授权
    High-frequency power amplifier 有权
    高频功率放大器

    公开(公告)号：US6160453A

    公开(公告)日：2000-12-12

    申请号：US220111

    申请日：1998-12-23

    Applicant: Peter Feld ,  Horst Kroeckel ,  Markus Vester

    Inventor： Peter Feld ,  Horst Kroeckel ,  Markus Vester

    IPC: H03F3/26 ,  H03F3/04

    CPC classification number: H03F3/265

    Abstract: A high-frequency power amplifier has a high-frequency input, a high-frequency output and at least one power transistor connected therebetween. The power transistor has a first electrode serving as a control input, a cooling terminal connected to a second electrode and a third electrode. The third electrode is connected to a high-frequency reference potential conductor and the high-frequency reference potential conductor is connected in terms of high-frequency to the second electrode. An input signal applied to the high-frequency input is coupled out as an output signal at the high-frequency output.

    Abstract translation: 高频功率放大器具有连接在其间的高频输入，高频输出和至少一个功率晶体管。 功率晶体管具有用作控制输入的第一电极，连接到第二电极和第三电极的冷却端子。 第三电极连接到高频参考电位导体，高频参考电位导体以高频率连接到第二电极。 施加到高频输入的输入信号作为高频输出端的输出信号被耦合出来。

    Duplexer including a variable capacitance diode for an ultrasound imaging system
    94.
    发明授权
    Duplexer including a variable capacitance diode for an ultrasound imaging system 失效
    双工器包括用于超声成像系统的可变电容二极管

    公开(公告)号：US5609154A

    公开(公告)日：1997-03-11

    申请号：US425631

    申请日：1995-04-20

    Applicant: Ralph Oppelt ,  Markus Vester

    Inventor： Ralph Oppelt ,  Markus Vester

    IPC: G01S7/523 ,  G10K11/34 ,  H03K17/76 ,  A61B8/00

    CPC classification number: H03K17/76 ,  G01S7/523 ,  G10K11/341

    Abstract: A duplexer for an ultrasound imaging-system capable of selectively coupling a transducer element to either a transmitter or a receiver, depending on whether the imaging system is in the transmit mode or receive mode, contains a variable capacitance diode which is connected in a direction opposite that of transmit pulses emitted by the transmitter between the transducer element and the receiver. In this manner, one obtains an improved duplexer that operates with virtually no power loss, without drive circuits, without leakage currents, and with low noise.

    Abstract translation: 根据成像系统是处于发射模式还是接收模式，能够选择性地将换能器元件耦合到发射器或接收器的超声成像系统的双工器包含可变电容二极管，其以相反的方向连接 发射机在传感器元件和接收器之间发射的发射脉冲。 以这种方式，获得一种改进的双工器，其实际上没有功率损耗，没有驱动电路，没有漏电流，并且噪声低。

    Anti-interference filter for a gradient coil in a nuclear magnetic resonance imaging apparatus
    95.
    发明授权
    Anti-interference filter for a gradient coil in a nuclear magnetic resonance imaging apparatus 失效
    核磁共振成像装置中的等级线圈的抗干扰滤波器

    公开(公告)号：US5200703A

    公开(公告)日：1993-04-06

    申请号：US764349

    申请日：1991-09-23

    Applicant: Walter Popp ,  Karl-Ulrich Erlenkamp ,  Peter Feld ,  Norbert Rietsch ,  Markus Vester

    Inventor： Walter Popp ,  Karl-Ulrich Erlenkamp ,  Peter Feld ,  Norbert Rietsch ,  Markus Vester

    IPC: A61B5/055 ,  G01R33/38 ,  G01R33/381 ,  G01R33/385 ,  G01R33/422 ,  H03H7/01 ,  H04B15/02

    CPC classification number: H03H7/1758 ,  G01R33/385 ,  G01R33/422 ,  H03H7/0115 ,  H03H7/1733 ,  H03H7/1766 ,  H03H7/1775 ,  H04B15/02 ,  H03H2001/0085

    Abstract: An anti-interference filter for radio-shielding a feeder to a gradient coil in a nuclear magnetic resonance imaging apparatus is constructed as a band elimination (band rejection) filter for the operating frequency of the nuclear magnetic resonance imaging apparatus. The anti-interference filter can be in the form of a directionally symmetrical quadrupole having two input terminals and two output terminals. A first input terminal and a first output terminal are introducible into the feeder to the gradient coil, and a second input terminal and a second output terminal are connected to a conductor at reference potential. A number of blocking circuits are arranged in series between the first input terminal and the first output terminal. A number acceptor circuits are arranged between the input terminals, between the junctions of the blocking circuits and the reference potential conductor, and between the output terminals. The number of acceptor circuits is one more than the number of blocking circuits.

    Abstract translation: 用于对核磁共振成像设备中的梯形线圈进给器进行放射线屏蔽的抗干扰滤波器被构造为用于核磁共振成像设备的工作频率的带除（带阻）滤波器。 抗干扰滤波器可以是具有两个输入端和两个输出端的定向对称四极的形式。 第一输入端子和第一输出端子被引入到馈电器中到梯形线圈，并且第二输入端子和第二输出端子连接到参考电位的导体。 多个阻塞电路串联布置在第一输入端和第一输出端之间。 在输入端子之间，阻塞电路的接点和参考电位导体之间以及输出端子之间布置有数个受电子电路。 受体电路的数量比阻塞电路的数量多一个。

    Transmitting and/or receiving MRI signals for a MRI examination
    98.
    发明授权
    Transmitting and/or receiving MRI signals for a MRI examination 有权

    公开(公告)号：US10094894B2

    公开(公告)日：2018-10-09

    申请号：US14632154

    申请日：2015-02-26

    Applicant: Andreas Fackelmeier ,  Sebastian Martius ,  Robert Rehner ,  Christopher Stumpf ,  Markus Vester

    Inventor： Andreas Fackelmeier ,  Sebastian Martius ,  Robert Rehner ,  Christopher Stumpf ,  Markus Vester

    IPC: G01R33/36 ,  G01R33/34

    Abstract: An arrangement includes a superconducting split ring resonator, a cryostat, and a copper coil. The resonator is arranged in the cryostat and includes at least one ring-shaped conductor made of a superconducting material and including an opening and a taper. The copper coil may be used to transmit a MRI excitation signal. This signal causes a current to be induced in the conductor that leads to the breakdown of the superconductivity. The conductor is detuned and therefore no longer develops an interfering effect. It is possible for the effect of the breakdown of superconductivity to be used for detuning in a targeted manner. After the transmission is complete, the conductor returns into the superconducting state and acts as a superconducting reception antenna for the MRI measurement signal. The copper coil is inductively coupled to the conductor and configured to read out the signal induced in the conductor.

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