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    HEARING PROTECTION DEVICE
    3.
    发明申请
    HEARING PROTECTION DEVICE 有权
    听觉保护装置

    公开(公告)号：US20150312670A1

    公开(公告)日：2015-10-29

    申请号：US14695875

    申请日：2015-04-24

    申请人： Yvonne Candidus ,  Hubertus Fischer

    发明人： Yvonne Candidus ,  Hubertus Fischer

    IPC分类号： H04R1/10

    CPC分类号： H04R1/1083 ,  A61B5/055 ,  A61F11/14 ,  A61F2250/0003 ,  G01R33/283 ,  G01R33/288 ,  H04R1/1008

    摘要： A hearing protection device for use in magnetic resonance devices is provided. The hearing protection device has a first hearing protection unit for disposal on a first ear of a patient and a second hearing protection unit for disposal on a second ear of a patient. The first hearing protection unit and/or the second hearing protection unit has a fluid cushion unit.

    摘要翻译： 提供一种用于磁共振装置的听力保护装置。 听力保护装置具有用于在患者的第一耳部处置的第一听力保护单元和用于在患者的第二耳朵上进行处置的第二听力保护单元。 第一听力保护单元和/或第二听力保护单元具有流体缓冲单元。

    MAGNETIC RESONANCE RF TRANSMISSION ARRANGEMENT AND METHOD WITH COMMONLY FED LABELING AND EXCITATION ANTENNAS
    4.
    发明申请
    MAGNETIC RESONANCE RF TRANSMISSION ARRANGEMENT AND METHOD WITH COMMONLY FED LABELING AND EXCITATION ANTENNAS 有权
    磁共振射频发射装置和方法与通用标签和激励天线

    公开(公告)号：US20090091326A1

    公开(公告)日：2009-04-09

    申请号：US12238871

    申请日：2008-09-26

    申请人： Hubertus Fischer ,  Helmut Kess ,  Georg Rauh ,  Wilfried Schnell

    发明人： Hubertus Fischer ,  Helmut Kess ,  Georg Rauh ,  Wilfried Schnell

    IPC分类号： G01R33/32

    CPC分类号： G01R33/3664 ,  G01R33/3642 ,  G01R33/4833 ,  G01R33/56366

    摘要： A radio-frequency transmission device for a magnetic resonance system to generate magnetic resonance exposures of an examination region of an examination subject, has: a first radio-frequency transmission antenna that emits radio-frequency signals in the examination region, a radio-frequency amplifier that supplies the first radio-frequency transmission antenna, with radio-frequency signals with a predetermined radio-frequency transmission power, and a second radio-frequency transmission antenna fashioned to label a medium flowing in the examination region and/or examination regions via emission of labeling radio-frequency signals, such that the medium can be identified in the generated magnetic resonance exposures of the examination region. The second radio-frequency transmission antenna is coupled with the radio-frequency amplifier to supply the first radio-frequency transmission antenna, such that it likewise supplies the second radio-frequency transmission antenna with radio-frequency signals with a predetermined radio-frequency transmission power for the emission of radio-frequency labeling signals.

    摘要翻译： 一种用于产生检查对象的检查区域的磁共振曝光的磁共振系统的射频传输装置，具有：在检查区域中发射射频信号的第一射频发射天线，射频放大器 其提供具有预定的射频发射功率的射频信号的第一射频发射天线，以及第二射频发射天线，其通过发射检测区域和/或检查区域中标记流经检查区域和/或检查区域的介质 标记射频信号，使得可以在产生的检查区域的磁共振暴露中识别介质。 第二射频发射天线与射频放大器耦合以提供第一射频发射天线，使得它同样向第二射频发射天线提供具有预定射频发射功率的射频信号 用于发射射频标签信号。

    MAGNETIC RESONANCE SYSTEM WITH RECEPTION ANTENNA DEVICE
    5.
    发明申请
    MAGNETIC RESONANCE SYSTEM WITH RECEPTION ANTENNA DEVICE 有权
    具有接收天线装置的磁共振系统

    公开(公告)号：US20080106264A1

    公开(公告)日：2008-05-08

    申请号：US11924777

    申请日：2007-10-26

    申请人： Hubertus Fischer ,  Martin Hergt ,  Thomas Kundner

    发明人： Hubertus Fischer ,  Martin Hergt ,  Thomas Kundner

    IPC分类号： G01R33/32

    CPC分类号： G01R33/341 ,  A61B5/055 ,  G01R33/3415 ,  G01R33/3628 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/3692

    摘要： A magnetic resonance system that has a magnet system that generates magnetic fields in an excitation region, allowing nuclei in an examination subject in the excitation region to be excited to emit a magnetic resonance signal. A reception antenna device with multiple local coils for reception of the magnetic resonance signals is arranged in proximity to the examination subject, and has a base part and an attachment part. The attachment part can be placed on the base part such that the examination subject is located between the base part and the attachment part (6). The multiple local coils are respectively connected with an evaluation device for evaluation of magnetic resonance signals. To simply and reliably couple the antenna devices to an evaluation device with optimally few electrical conductors being located in the excitation region, the multiple local coils in the attachment part are respectively connected with the evaluation device via a base coupling element that is arranged at a predetermined base part location on the base part and an attachment coupling element is arranged at a predetermined attachment part location on the attachment part. The magnetic resonance signal received by the local coil can be fed to the evaluation device via the attachment coupling element and the base coupling element and as long as the attachment part is placed on the base part.

    摘要翻译： 一种磁共振系统，其具有在激励区域中产生磁场的磁体系统，其允许励磁区域中的检查对象中的核被发射出磁共振信号。 具有用于接收磁共振信号的多个本地线圈的接收天线装置布置在检查对象附近，并且具有基部和附接部。 安装部可以放置在基部上，使检查对象位于基部与安装部（6）之间。 多个本地线圈分别与用于评估磁共振信号的评估装置连接。 为了将天线装置简单且可靠地耦合到评估装置，其中最佳较少的电导体位于激励区域中，附接部分中的多个局部线圈分别经由基座耦合元件与评估装置连接，该基座耦合元件布置在预定的 在基部上的基部位置和附接联接元件布置在附接部分上的预定的附接部位。 由本地线圈接收的磁共振信号可以通过附接联接元件和基座联接元件被馈送到评估装置，并且只要将附接部件放置在基座部分上即可。

    Magnetic resonance imaging apparatus having a resonant circuit for generating gradient fields, and method for operating same
    6.
    发明授权
    Magnetic resonance imaging apparatus having a resonant circuit for generating gradient fields, and method for operating same 失效
    具有用于产生梯度场的谐振电路的磁共振成像装置及其操作方法

    公开(公告)号：US5298863A

    公开(公告)日：1994-03-29

    申请号：US621040

    申请日：1990-12-03

    申请人： Stefan Nowak ,  Franz Schmitt ,  Hubertus Fischer

    发明人： Stefan Nowak ,  Franz Schmitt ,  Hubertus Fischer

    IPC分类号： G01R33/385 ,  G01R33/20

    CPC分类号： G01R33/3852

    摘要： A gradient coil for generating a periodically changing read-out gradient in a magnetic resonance imaging apparatus is operated in a series resonant circuit having a capacitor. One of the elements of the series resonant circuit is charged before the beginning of each read-out gradient. The gradient coil can be charged with current, or the capacitor can be charged with voltage. Such operation either avoids or significantly shortens the transient effect which occurs after excitation of the nuclear spins. The use of a series resonant circuit instead of a parallel resonant circuit significantly reduces the voltage load on the gradient amplifier, so that the gradient amplifier can be constructed simpler and more inexpensively.

    摘要翻译： 在具有电容器的串联谐振电路中操作用于在磁共振成像装置中产生周期性变化的读出梯度的梯度线圈。 在每个读出梯度的开始之前，串联谐振电路的元件之一被充电。 梯度线圈可以充电电流，或者电容器可以充电电压。 这种操作可以避免或显着缩短在核自旋激发后发生的瞬态效应。 使用串联谐振电路代替并联谐振电路可以显着降低梯度放大器的电压负载，从而使梯度放大器的构造更简单，成本更低。

    Method for improving the signal-to-noise ratio in a nuclear magnetic resonance tomography apparatus
    7.
    发明授权
    Method for improving the signal-to-noise ratio in a nuclear magnetic resonance tomography apparatus 失效
    改进核磁共振成像装置中信号噪声比的方法

    公开(公告)号：US5084675A

    公开(公告)日：1992-01-28

    申请号：US565951

    申请日：1990-08-10

    申请人： Hans-Erich Reinfelder ,  Hubertus Fischer

    发明人： Hans-Erich Reinfelder ,  Hubertus Fischer

    IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/56

    CPC分类号： G01R33/56 ,  G01R33/543 ,  G01R33/5608 ,  G01R33/5616

    摘要： In the echo planar imaging (EPI) method of operating a nuclear magnetic resonance (magnetic resonance imaging) tomography apparatus, the necessary, rapid switching of gradients having a high amplitude usually cannot be achieved with square-wave gradients, and therefore a read-out gradient having a sinusoidal shape is generally used. Given a chronologically equidistant sampling of the nuclear magnetic resonance signal in the time domain, however, a sampling in the k-space with different rates is present. The bandwidth of the signal is proportional to the sampling rate in the k-space. In the method disclosed herein, bandwidth of a bandpass filter or a low-pass filter in the signal processing circuit for the nuclear magnetic resonance signal is adapted to the time dependent bandwith of the nuclear magnetic resonance signal, i.e., to the sampling rate in the k-space. The bandwidth is increased with increasing sampling rate. The signal-to-noise ratio is noticeably improved.

    摘要翻译： 在操作核磁共振（磁共振成像）断层摄影装置的回波平面成像（EPI）方法中，通常使用方波梯度不能实现具有高振幅的梯度的必要的快速切换，因此读出 通常使用具有正弦形状的梯度。 然而，鉴于时域上的核磁共振信号的时间上等距离的采样，存在具有不同速率的k空间中的采样。 信号的带宽与k空间中的采样率成比例。 在本文公开的方法中，用于核磁共振信号的信号处理电路中的带通滤波器或低通滤波器的带宽适应于核磁共振信号的时间依赖带宽，即适应于 k空间。 带宽随采样率的增加而增加。 信噪比明显提高。

    Method for operating a nuclear magnetic resonance tomography apparatus
    8.
    发明授权
    Method for operating a nuclear magnetic resonance tomography apparatus 失效
    用于操作核磁共振断层摄影装置的方法

    公开(公告)号：US4825159A

    公开(公告)日：1989-04-25

    申请号：US183231

    申请日：1988-04-19

    申请人： Arnulf Oppelt ,  Hubertus Fischer ,  Helmut Barfuss

    发明人： Arnulf Oppelt ,  Hubertus Fischer ,  Helmut Barfuss

    IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/50 ,  G01R33/56 ,  G01R33/20

    CPC分类号： G01R33/56 ,  G01R33/50

    摘要： An examination subject is irradiated with a sequence of RF pulses. Negative gradient pulses G.sub.z3 and G.sub.y4, as well as a phase-coding gradient G.sub.x2 are generated preceding each RF pulse. Negative gradient pulses G.sub.z2 and G.sub.y1, as well as a phase-coding gradient G.sub.x1, are generated following each RF pulse. The phase-coding gradient G.sub.x1 is inverted relative to the phase-coding gradient G.sub.x2. The negative gradient pulse G.sub.y1 is followed by a positive gradient pulse G.sub.y2 which serves as a read-out gradient during which a first signal S.sub.1 is received. A positive gradient pulse G.sub.y3 is generated preceding the negative gradient pulse G.sub.y4, the positive gradient pulse G.sub.y3 serving as a read-out gradient during which a second signal S.sub.2 is received. Two signals having different T.sub.2 weighting are thus obtained in each measuring sequence, without extending the measuring time. Two images having different T.sub.2 contrast, and thus increased diagnostic value, can thus be produced.

    摘要翻译： 用一系列RF脉冲照射检查对象。 在每个RF脉冲之前产生负梯度脉冲Gz3和Gy4，以及相位编码梯度Gx2。 在每个RF脉冲之后产生负梯度脉冲Gz2和Gy1以及相位编码梯度Gx1。 相位编码梯度Gx1相对于相位编码梯度Gx2反转。 负梯度脉冲Gy1之后是用作接收第一信号S1的读出梯度的正梯度脉冲Gy2。 在负梯度脉冲Gy4之前产生正梯度脉冲Gy3，正梯度脉冲Gy3用作接收第二信号S2的读出梯度。 因此，在每个测量序列中获得具有不同T2加权的两个信号，而不延长测量时间。 因此可以产生具有不同T2对比度，从而增加诊断价值的两个图像。