公开(公告)号：US20100074365A1

公开(公告)日：2010-03-25

申请号：US12585373

申请日：2009-09-14

申请人： Ralf Ladebeck ,  Markus Vester

发明人： Ralf Ladebeck ,  Markus Vester

IPC分类号： H04B15/00 ,  H04B1/10

CPC分类号： G01T1/1603 ,  A61B5/0002 ,  A61B5/055 ,  A61B5/7257 ,  A61B6/037 ,  A61B6/5247 ,  G01D3/036 ,  G01R33/481 ,  G01T1/17

摘要： A method and a transmission system are disclosed for the transmission of wanted signals between a sensor and an evaluation unit. In order to suppress interference to the sensor signals due to external interference sources as far as possible, at least one embodiment of the inventive system has at least one signal receiver with the sensor for detecting a wanted signal and a signal processing device for conditioning the wanted signal, at whose output a mixed signal with a wanted signal component and an interference signal component from at least one interference source are present; an interference source signal input for detecting at least one interference source signal of the at least one interference source; a filter device for reconstructing the interference signal component as a function of the at least one interference source signal; and a subtractor for eliminating interference superimposed on the wanted signal.

摘要翻译： 公开了用于在传感器和评估单元之间传输所需信号的方法和传输系统。 为了尽可能地抑制由于外部干扰源对传感器信号的干扰，本发明系统的至少一个实施例具有至少一个具有用于检测有用信号的传感器的信号接收器和用于调节所需信号的信号处理装置 信号，其输出具有有用信号分量的混合信号和来自至少一个干扰源的干扰信号分量; 用于检测所述至少一个干扰源的至少一个干扰源信号的干扰源信号输入; 滤波器装置，用于根据所述至少一个干扰源信号重建所述干扰信号分量; 以及用于消除叠加在有用信号上的干扰的减法器。

公开(公告)号：US20090256571A1

公开(公告)日：2009-10-15

申请号：US12101252

申请日：2008-04-11

申请人： Mark A. Griswold ,  Jeremiah Heilmann ,  Wolfgang Renz ,  Markus Vester

发明人： Mark A. Griswold ,  Jeremiah Heilmann ,  Wolfgang Renz ,  Markus Vester

IPC分类号： G01R33/28

CPC分类号： G01R33/3858 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/3614 ,  G01R33/385 ,  G01R33/4215

摘要： An arrangement for controlling an antenna arrangement in a magnetic resonance device has an antenna arrangement that surrounds an examination region and that has at least one antenna element for emitting an amplified transmit signal. At least one amplifier is provided, at the input of which a high-frequency transmit signal is connected, which is present on the output side of the amplifier as an amplified transmit signal. The amplifier is connected to a feed point of the antenna arrangement on the output side, in order to emit the amplified transmit signal. Coil windings of a primary gradient coil are also provided, which at least partially include the antenna arrangement and the examination region. Coil windings of a secondary gradient coil at least partially include the coil windings of the primary gradient coil, the antenna arrangement (and the examination region). The coil windings of the secondary gradient coil and the coil windings of the primary gradient coil are at a distance from one another, in which the at least one amplifier is arranged.

摘要翻译： 用于控制磁共振装置中的天线装置的装置具有围绕检查区域的天线装置，并且具有用于发射放大的发射信号的至少一个天线元件。 提供至少一个放大器，在其输入处连接有高频发射信号，其作为放大的发射信号存在于放大器的输出侧。 放大器连接到输出侧的天线装置的馈电点，以便发射放大的发射信号。 还提供了主梯度线圈的线圈绕组，其至少部分地包括天线装置和检查区域。 次级梯度线圈的线圈绕组至少部分地包括主梯度线圈的线圈绕组，天线装置（和检查区域）。 次级梯度线圈的线圈绕组和主梯度线圈的线圈绕组彼此间隔开，其中布置有至少一个放大器。

公开(公告)号：US07579836B2

公开(公告)日：2009-08-25

申请号：US11994019

申请日：2007-01-30

申请人： Wilfried Schnell ,  Markus Vester

发明人： Wilfried Schnell ,  Markus Vester

IPC分类号： G01V3/00 ,  H01P7/08

CPC分类号： G01R33/345 ,  G01R33/3642

摘要： A resonator for magnetic resonance applications has a conductor element proceeding in an extension direction, that operates with a resonance current at a resonance frequency oscillating therein in the extension direction. The conductor element is tuned to the resonance frequency and has an overall length in the extension direction that is smaller than half of the wavelength of the resonance frequency. The conductor element is a multi-layer conductor with layers that are electrically insulated from each other that, in said extension direction, have layer ends that are capacitively coupled with each other. During operation of the conductor element at the resonance frequency, respective layer currents flow in the layers in the extension direction that are substantially equal in magnitude.

摘要翻译： 用于磁共振应用的谐振器具有沿延伸方向前进的导体元件，其以在延伸方向上振荡的谐振频率的谐振电流工作。 导体元件被调谐到谐振频率，并且在延伸方向上的总长度小于谐振频率波长的一半。 导体元件是具有彼此电绝缘的层的多层导体，其在所述延伸方向上具有彼此电容耦合的层端。 在谐振频率下的导体元件工作期间，各层电流在延伸方向的层中流动，其大小基本相等。

公开(公告)号：US20090146660A1

公开(公告)日：2009-06-11

申请号：US12332617

申请日：2008-12-11

申请人： Wilfried Schnell ,  Markus Vester

发明人： Wilfried Schnell ,  Markus Vester

IPC分类号： G01R33/20

CPC分类号： G01R33/5612 ,  G01R33/288 ,  G01R33/3415 ,  G01R33/3607

摘要： A magnetic resonance system has multiple individual transmission antennas each charged with a transmission current to emit an individual excitation field in an examination volume to excite magnetic resonances in a subject in the examination volume, with a total excitation field being a superimposition of the individual excitation fields. A determination device is provided with a spatial distribution of an absorption rate of the examination subject and determines a combination of amplitudes and phase positions for the transmission currents relative to one another such that a locally absorbed power at a first point of the examination subject relative to a locally absorbed power at a second point of the examination subject satisfies a relative condition. The determination device communicates the combination of amplitudes and phase positions that it has determined to a control device. The control device charges the transmission antennas with transmission currents whose phase positions correspond with the phase positions communicated by the determination device and whose amplitudes are scaled with a uniform scaling factor for all transmission currents relative to the amplitudes communicated by the determination device.

摘要翻译： 磁共振系统具有多个单独的发射天线，每个发射天线都充满了传输电流，以在检查体积中发射单独的激发场，以激发检查体积中的受检者的磁共振，总激励场是各个激励场的叠加 。 确定装置被提供有检查对象的吸收率的空间分布，并确定相对于彼此的传输电流的幅度和相位位置的组合，使得在检查对象的第一点处的局部吸收功率相对于 在检查对象的第二点处的局部吸收力满足相对条件。 确定装置将其已经确定的幅度和相位位置的组合传送到控制装置。 控制装置用发射电流对发射天线进行充电，其相位位置对应于由确定装置传送的相位位置，并且其幅度以相对于由确定装置传送的振幅的所有发射电流的均匀缩放因子缩放。

公开(公告)号：US20090096456A1

公开(公告)日：2009-04-16

申请号：US12243056

申请日：2008-10-01

申请人： Stephan Biber ,  Helmut Greim ,  Joerg Rothard ,  Markus Vester

发明人： Stephan Biber ,  Helmut Greim ,  Joerg Rothard ,  Markus Vester

IPC分类号： G01R33/36

CPC分类号： G01R33/3415 ,  A61B5/055 ,  G01R33/34046 ,  G01R33/3642 ,  G01R33/3692

摘要： 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.

摘要翻译： 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：US20090096455A1

公开(公告)日：2009-04-16

申请号：US12243038

申请日：2008-10-01

申请人： Stephan Biber ,  Jan Bollenbeck ,  Ralph Oppelt ,  Markus Vester

发明人： Stephan Biber ,  Jan Bollenbeck ,  Ralph Oppelt ,  Markus Vester

IPC分类号： G01R33/36

CPC分类号： G01R33/3415 ,  G01R33/3621 ,  G01R33/3664 ,  G01R33/3692

摘要： An arrangement to transmit magnetic resonance signals has at least two reception branches. Each reception branch contains a single antenna of a local coil as well as an amplifier connected with the single antenna, such that an amplified magnetic resonance signal is formed from a magnetic resonance signal that is acquired via the single antenna. In a multiplexer, each input is connected with a respective reception branch, such that the amplified magnetic resonance signals of the reception branch are combined by the multiplexer into a resulting signal using a time multiplexing method. A transmission path is connected on one side with an output of the multiplexer and on the other side with a receiver, such that the resulting signal is transmitted from the multiplexer to the receiver via the transmission path.

摘要翻译： 传输磁共振信号的装置具有至少两个接收分支。 每个接收分支包含本地线圈的单个天线以及与单个天线连接的放大器，使得经由单个天线获取的磁共振信号形成放大的磁共振信号。 在多路复用器中，每个输入与相应的接收分支相连，使得接收分支的放大的磁共振信号由多路复用器使用时间复用方法组合成结果信号。 传输路径在一侧与多路复用器的输出端连接，另一侧与接收器连接，使得所得到的信号经由传输路径从多路复用器传输到接收器。

公开(公告)号：US07417433B2

公开(公告)日：2008-08-26

申请号：US11436211

申请日：2006-05-17

申请人： Oliver Heid ,  Markus Vester

发明人： Oliver Heid ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： A61B5/055 ,  G01R33/3415 ,  G01R33/3692 ,  H03F7/04

摘要： In a method for implementation of a magnetic resonance examination, and a magnetic resonance apparatus, and an array for acquisition of magnetic resonance signals, and a magnetic resonance signal at a magnetic resonance frequency are acquired from an examination region with an array of frequency conversion units after an RF excitation and are radiated as frequency-converted signals. The resulting signal field is acquired by a number of reception antennas of a second antenna array, which are arranged at different spatial positions and thus allow a spatial resolution of the frequency-converted signals. The acquired acquisition signals are used for image reconstruction.

摘要翻译： 在用于执行磁共振检查的方法中，并且从具有频率转换单元阵列的检查区域获取磁共振检查的方法和磁共振装置以及用于获取磁共振信号的阵列和磁共振频率的磁共振信号 在RF激励之后并且被辐射为频率转换信号。 所得到的信号场由第二天线阵列的多个接收天线获取，第二天线阵列被布置在不同的空间位置，从而允许频率转换信号的空间分辨率。 获取的采集信号用于图像重建。

公开(公告)号：US20080197922A1

公开(公告)日：2008-08-21

申请号：US11766833

申请日：2007-06-22

申请人： Wilfried Schnell ,  Markus Vester

发明人： Wilfried Schnell ,  Markus Vester

IPC分类号： H03F3/68 ,  H01Q21/00

CPC分类号： H01Q3/40 ,  H01Q25/00 ,  H03F3/602

摘要： An amplifier device for a mode antenna has a number of amplifiers and a number of outputs. An input signal is fed to each amplifier, which is amplified by the respective amplifier into an amplified input signal. The amplified input signals are fed to an output matrix arranged after the amplifiers. Respective output signals are emitted by the output matrix at the outputs. The output matrix causes each amplified input signal to supply an output signal contribution for each output signal. Each output signal contribution of each output signal has an output-side contribution offset in relation to the corresponding amplified input signal, which depends on the amplified input signal that supplied the output signal contribution, and the output signal to which the output signal contribution contributes. The amplifier device is especially able to be used in a transmit arrangement for radio-frequency signals.

摘要翻译： 用于模式天线的放大器装置具有多个放大器和多个输出。 输入信号被馈送到每个放大器，其由相应的放大器放大成放大的输入信号。 放大的输入信号被馈送到布置在放大器之后的输出矩阵。 各输出信号由输出矩阵输出。 输出矩阵使得每个放大的输入信号为每个输出信号提供输出信号贡献。 每个输出信号的每个输出信号贡献具有相对于对应的放大输入信号的输出侧贡献偏移，其取决于提供输出信号贡献的放大输入信号和输出信号贡献贡献的输出信号。 放大器装置特别能够用于射频信号的发送装置。

公开(公告)号：US20080197849A1

公开(公告)日：2008-08-21

申请号：US11993932

申请日：2006-09-28

申请人： Oliver Heid ,  Markus Vester

发明人： Oliver Heid ,  Markus Vester

IPC分类号： G01R33/28 ,  A61B5/055

CPC分类号： G01R33/56375 ,  G01R33/3415 ,  G01R33/3642

摘要： A magnetic resonance system has a base body embodying a magnet system that generates magnetic fields in an excitation region on the base body, a patient bed that is movable in a travel direction through a travel region relative to the base body, the patient bed receiving an examination subject thereon to move the examination subject through the examination region, a local coil that is operable in combination with the magnet system to generate magnetic resonance signals in the examination subject and to detect the magnetic resonance signals resulting therefrom, and an evaluation device that evaluates the magnetic resonance signals detected by the local coil. A base body coupling element, at a predetermined base body location, is connected to the evaluation device. A patient bed coupling element, located at a predetermined patient bed location, is connected to the local coil. The base body and patient bed coupling elements feed the magnetic resonance signals to the evaluation device when, and as long as, the patient bed has moved by a predetermined segment of the travel region.

摘要翻译： 磁共振系统具有体现磁体系统的基体，该磁体系统在基体上的激发区域中产生磁场，患者床可相对于基体在行进方向上通过行进区域移动，患者床接收 检查对象通过检查区域移动检查对象，本地线圈，其可与磁体系统组合操作以在检查对象中产生磁共振信号，并检测由此产生的磁共振信号，以及评估装置，其评估 由本地线圈检测到的磁共振信号。 在预定的基体位置处的基体连接元件连接到评估装置。 位于预定患者床位置处的患者床联接元件连接到局部线圈。 当患者床已经移动了行进区域的预定段时，基体和患者床联接元件将磁共振信号馈送到评估装置。

公开(公告)号：US20070207763A1

公开(公告)日：2007-09-06

申请号：US11680720

申请日：2007-03-01

申请人： Jan Bollenbeck ,  Martin Hergt ,  Markus Vester

发明人： Jan Bollenbeck ,  Martin Hergt ,  Markus Vester

IPC分类号： H04B1/26

CPC分类号： H03D7/1408

摘要： In a mixer circuit with a balanced frequency mixer with varactor diodes, a first input signal that exhibits a first input frequency can be fed to the frequency mixer via a first input. Furthermore, a second input signal that exhibits a second input frequency can be fed to the frequency mixer via a second input. The frequency mixer has at least two amplifier elements fashioned as varactor diodes. These amplifier elements mix the input signals with one another into a mix signal with a first signal component and a second signal component. The first signal component exhibits a first component frequency, the second signal component a second component frequency. The first component frequency is equal to the sum of the first and second input frequencies, the second component frequency is equal to the difference of the first and second input frequencies. An output signal that contains at least one of the signal components can be tapped via the output. The frequency mixer is fashioned as a balanced frequency mixer in which at least the second input and the output are decoupled from one another. The second input frequency is a multiple of the first input frequency. An adjustment circuit for adjustment of an operating point of the varactor diodes is connected in parallel with each varactor diode.

摘要翻译： 在具有具有变容二极管的平衡混频器的混频器电路中，具有第一输入频率的第一输入信号可以经由第一输入馈送到混频器。 此外，具有第二输入频率的第二输入信号可以经由第二输入馈送到混频器。 混频器具有至少两个放大器元件，其形式为变容二极管。 这些放大器元件将输入信号彼此混合成具有第一信号分量和第二信号分量的混合信号。 第一信号分量呈现第一分量频率，第二信号分量呈现第二分量频率。 第一分量频率等于第一和第二输入频率的和，第二分量频率等于第一和第二输入频率的差。 包含至少一个信号分量的输出信号可以通过输出进行抽头。 混频器被形成为平衡混频器，其中至少第二输入和输出彼此解耦。 第二输入频率是第一输入频率的倍数。 用于调整变容二极管的工作点的调整电路与每个变容二极管并联连接。