公开(公告)号：US4801885A

公开(公告)日：1989-01-31

申请号：US97138

申请日：1987-09-16

申请人： Ralph Meissner ,  Helmut Kess

发明人： Ralph Meissner ,  Helmut Kess

IPC分类号： G01R33/36 ,  G01R33/20

CPC分类号： G01R33/3657 ,  G01R33/3628

摘要： A nuclear magnetic resonance apparatus which is capable of identifying either spectra or images of an examination subject uses a body resonator, such as a whole-body antenna, for transmitting radio frequency signals at a wave length .lambda. to induce nuclear magnetic resonance phenomena in the examination subject, and a surface coil for receiving the resulting nuclear magnetic resonance signals. For decoupling the body resonator from the surface coil, a .lambda./4 line is connected to the surface coil. A terminating end of the .lambda./4 line is short-circuited during emission of radio frequency pulses by the body resonator, and is opened during reception of nuclear magnetic resonance signals using the surface coil. An effective detuning of the body resonator is thus achieved during the reception event, and at the same time the transmission event is minimally influenced.

摘要翻译： 能够识别检查对象的光谱或图像的核磁共振装置使用身体谐振器，例如全身天线，用于以波长λ传输射频信号，以在检查中引起核磁共振现象 主体和用于接收所得到的核磁共振信号的表面线圈。 为了将体谐振器与表面线圈分离，将λ/ 4线连接到表面线圈。 在通过身体谐振器发射射频脉冲期间，λ/ 4线的终端短路，并且在使用表面线圈接收核磁共振信号期间打开。 因此，在接收事件期间实现了体谐振器的有效失谐，同时传输事件受到最小的影响。

公开(公告)号：US4701710A

公开(公告)日：1987-10-20

申请号：US736768

申请日：1985-05-22

申请人： Ludger Freisen ,  Helmut Kess ,  Norbert Krause ,  Ralph Meissner

发明人： Ludger Freisen ,  Helmut Kess ,  Norbert Krause ,  Ralph Meissner

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/32 ,  G01R33/34 ,  G01R33/36 ,  G01R33/44 ,  G01R33/20

CPC分类号： G01R33/3635 ,  G01R33/34046

摘要： For the representation of images of regions selected from the interior of an examination subject, coils are provided for the application of a primary magnetic field and of magnetic gradient fields to the examination subject. An electrical conductor configuration detects the deflection of the atomic nuclei of the examination subject from their position of equilibrium as a result of high frequency magnetic excitation pulses. The configuration is formed by two interspersed individual conductor configurations adapted for respective different measurement frequencies. Each configuration comprises parallel conductors connected at their ends and arranged in spaced relation to an electrically grounded surface to form a transmission line configuration resonant at a respective one of the measurement frequencies.

摘要翻译： 对于从检查对象的内部选择的区域的图像的表示，提供用于向检查对象施加一次磁场和磁梯度场的线圈。 电导体结构由高频磁激励脉冲的结果检测检查对象的原子核从其平衡位置的偏移。 该配置由适合于各个不同测量频率的两个散置的单个导体配置形成。 每个配置包括在其端部连接并且与电接地表面间隔开地布置的并联导体，以形成在相应的一个测量频率下谐振的传输线配置。

公开(公告)号：US5990625A

公开(公告)日：1999-11-23

申请号：US940466

申请日：1997-09-30

申请人： Ralph Meissner ,  Rainer Kuth ,  Wolfgang Pritzel

发明人： Ralph Meissner ,  Rainer Kuth ,  Wolfgang Pritzel

IPC分类号： G01R33/36 ,  A61B5/055 ,  G01R33/28 ,  H03H5/00 ,  H04B15/00 ,  G02F1/13

CPC分类号： G01R33/28 ,  H04B15/00

摘要： In an electrical assembly with an electrical or electronic component part that generates a noise signal with a disturbing frequency, a parallel resonant circuit tuned to the frequency is arranged in the immediate proximity of the component part.

摘要翻译： 在具有产生具有干扰频率的噪声信号的电气或电子部件的电气组件中，调谐到频率的并联谐振电路被布置在组件部分的紧邻附近。

公开(公告)号：US4714887A

公开(公告)日：1987-12-22

申请号：US849404

申请日：1986-04-08

申请人： Ralph Meissner ,  Walter Popp

发明人： Ralph Meissner ,  Walter Popp

IPC分类号： G01R33/32 ,  A61B5/055 ,  A61B10/00 ,  G01R33/34 ,  G01R33/341 ,  G01R33/20

CPC分类号： G01R33/341

摘要： A tomography apparatus utilizing nuclear magnetic resonance techniques for representing internal cross-sections of an examination subject has a surface coil for acquiring a signal corresponding to the displacement of the nuclear spins of the examination subject from a equilibrium position. The surface coil is annular and has its ends connected to ground through respective capacitances. A tape-shaped high-frequency shielding at least partially surrounds the surface coil.

摘要翻译： 利用用于表示检查对象的内部横截面的核磁共振技术的断层摄影装置具有用于从平衡位置获取对应于检查对象的核自旋的位移的信号的表面线圈。 表面线圈是环形的，其端部通过相应的电容连接到地面。 带状高频屏蔽至少部分地围绕表面线圈。

公开(公告)号：US5317266A

公开(公告)日：1994-05-31

申请号：US974120

申请日：1992-11-10

申请人： Ralph Meissner

发明人： Ralph Meissner

IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/34 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/20

CPC分类号： G01R33/341 ,  G01R33/3415

摘要： A local antenna for transmitting and/or receiving radio frequency signals in a nuclear magnetic resonance imaging apparatus includes first and second sub-antennas which are axially spaced from each other. The sub-antennas each are composed of at least one conductor turn. An electrical series circuit is formed of the first sub-antenna, a capacitive element for shortening the path length effective for the radio frequency signal and of the second sub-antenna. The two sub-antennas have the same winding direction. A capacitor is connected in parallel with the series circuit. The respective capacitance values of the series capacitive element and the parallel capacitor are approximately the same. For constructing a local antenna system especially suitable for mammography, two such local antennas are arranged side-by-side and are electrically connected in parallel. The series capacitive elements of the two local antennas face each other.

摘要翻译： 用于在核磁共振成像设备中发送和/或接收射频信号的本地天线包括彼此轴向间隔开的第一和第二子天线。 子天线每个由至少一个导体转弯组成。 电串联电路由第一子天线形成，电容元件用于缩短对射频信号和第二子天线有效的路径长度。 两个子天线具有相同的卷绕方向。 电容器与串联电路并联连接。 串联电容元件和并联电容器的各自的电容值大致相同。 为了构建特别适用于乳房X线照相术的本地天线系统，两个这样的本地天线并排设置并联并联。 两个本地天线的串联电容元件彼此面对。