公开(公告)号：US20090128149A1

公开(公告)日：2009-05-21

申请号：US12266714

申请日：2008-11-07

Applicant: Helmut Greim

Inventor： Helmut Greim

IPC: G01R33/32

CPC classification number: A61B5/055 ,  G01R33/288 ,  G01R33/3415 ,  G01R33/3664

Abstract: A local coil arrangement for a magnetic resonance apparatus has a support structure with an antenna arrangement and a sensor arrangement embedded in the support structure. The antenna arrangement has a number of magnetic resonance antennas. A magnetic resonance excitation signal can respectively be emitted by means of each magnetic resonance antenna and/or a magnetic resonance signal can respectively be received by means of each magnetic resonance antenna. The sensor arrangement has a number of magnetic field sensors and an evaluation circuit. The magnetic field sensors detect how large a static magnetic field is to which the local coil arrangement is exposed and output a corresponding output signal and supply a corresponding output signal to the evaluation circuit. The evaluation circuit determines a logical presence signal and outputs it. The value of the logical presence signal depends on whether a field strength of the static magnetic field is greater than a minimum field strength.

Abstract translation: 用于磁共振装置的本地线圈装置具有支撑结构，其具有嵌入在支撑结构中的天线装置和传感器装置。 天线装置具有多个磁共振天线。 可以分别通过每个磁共振天线发射磁共振激励信号和/或分别通过每个磁共振天线接收磁共振信号。 传感器装置具有多个磁场传感器和评估电路。 磁场传感器检测局部线圈装置暴露的静态磁场有多大，并输出相应的输出信号，并将相应的输出信号提供给评估电路。 评估电路确定逻辑存在信号并输出​​。 逻辑存在信号的值取决于静态磁场的场强是否大于最小场强。

公开(公告)号：US20090096456A1

公开(公告)日：2009-04-16

申请号：US12243056

申请日：2008-10-01

Applicant: Stephan Biber ,  Helmut Greim ,  Joerg Rothard ,  Markus Vester

Inventor： Stephan Biber ,  Helmut Greim ,  Joerg Rothard ,  Markus Vester

IPC: G01R33/36

CPC classification number: G01R33/3415 ,  A61B5/055 ,  G01R33/34046 ,  G01R33/3642 ,  G01R33/3692

Abstract: An arrangement to transmit magnetic resonance signals has a local coil composed of a number of individual antennas for acquisition of radio-frequency signals of a magnetic resonance examination. Preamplifiers amplify the radio-frequency signals, and a transmission device transmits the radio-frequency signals from the local coil to the preamplifiers. The transmission device is fashioned as a readout coil and has a number of individual antennas. The individual antennas of the readout coil are magnetically coupled with the individual antennas of the local coil, with the individual antennas of the local coil and the individual antennas of the readout coil forming a linear MIMO transmission system describable by a transmission matrix.

Abstract translation: 用于发送磁共振信号的装置具有由用于获取磁共振检查的射频信号的多个单独天线组成的局部线圈。 前置放大器放大射频信号，并且传输设备将来自本地线圈的射频信号发送到前置放大器。 传输装置被形成为读出线圈并且具有多个单独的天线。 读出线圈的各个天线与本地线圈的各个天线磁耦合，本地线圈的各个天线和读出线圈的各个天线形成可由传输矩阵描述的线性MIMO传输系统。

公开(公告)号：US07367839B2

公开(公告)日：2008-05-06

申请号：US11493105

申请日：2006-07-25

Applicant: Helmut Greim ,  Jürgen Hagen

Inventor： Helmut Greim ,  Jürgen Hagen

IPC: H01R9/05 ,  H01R9/03 ,  H01R13/66 ,  H01R33/945

CPC classification number: H01R13/6625 ,  G01R33/3685 ,  H01R13/6592 ,  H01R13/7195 ,  H01R2201/12

Abstract: Feed line for at least one local coil in a magnetic resonance tomography apparatus, comprising at least one coil plug as well as at least one standing wave barrier for suppression of unwanted radio-frequency currents on a conductor cable of the feed line, with the standing wave barrier integrated into the coil plug.

Abstract translation: 在磁共振断层摄影装置中用于至少一个局部线圈的馈送线，包括至少一个线圈插头以及至少一个驻波屏障，用于抑制馈线的导体电缆上的不期望的射频电流， 波形屏障集成到线圈插头中。

公开(公告)号：US6133737A

公开(公告)日：2000-10-17

申请号：US80355

申请日：1998-05-18

Applicant: Helmut Greim

Inventor： Helmut Greim

IPC: G01R33/36 ,  A61B5/055 ,  G01R33/34 ,  H01Q1/22 ,  H01Q21/24 ,  G01V3/00

CPC classification number: G01R33/3678 ,  G01R33/34046 ,  H01Q1/22 ,  H01Q21/24

Abstract: A circularly polarizing antenna for a magnetic resonance apparatus is formed by a first linear antenna subsystem and a second antenna subsystem arranged so as to be rotated 90.degree. relative to each other. On the side of the signal terminals and each antenna subsystem has a self-contained conductor. On the side facing away from the signal terminals, the antenna subsystems have a common self-contained conductor.

Abstract translation: 用于磁共振装置的圆极化天线由第一线性天线子系统和相对于彼此旋转90度的第二天线子系统形成。 在信号端子和每个天线子系统的一侧具有独立导体。 在远离信号端子的一侧，天线子系统具有公共的独立导体。

公开(公告)号：US5260658A

公开(公告)日：1993-11-09

申请号：US802542

申请日：1991-12-05

Applicant: Helmut Greim ,  Juergen Ruhl ,  Ralph Oppelt

Inventor： Helmut Greim ,  Juergen Ruhl ,  Ralph Oppelt

IPC: G01R33/44 ,  G01R33/36 ,  G01B33/20

CPC classification number: G01R33/3628

Abstract: A circuit for detuning a resonator in a nuclear magnetic resonance imaging apparatus has an output connected to a terminal of the resonator via a high-frequency line composed of two conductors. The resonator is shortened at this terminal with a shorting capacitor that can be short-circuited for detuning the resonator. The length of the high-frequency line is shorter than one-fourth of the wavelength of a high-frequency signal having the operating frequency of the nuclear magnetic resonance imaging apparatus on the high-frequency line. For detuning the resonator the high-frequency line can be terminated at the output with a further capacitor, so that the high-frequency line acts as a short-circuit at the terminal.

Abstract translation: 用于使核磁共振成像装置中的谐振器失谐的电路具有通过由两根导体组成的高频线连接到谐振器的端子的输出端。 谐振器在该端子处被缩短，其中短路电容器可以短路以使谐振器失谐。 高频线的长度比具有高频线上的核磁共振成像装置的工作频率的高频信号的波长的四分之一短。 为了使谐振器失谐，高频线路可以在另一个电容器的输出处终止，使得高频线路作为端子处的短路。