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    Antenna circuit for an MRI system
    1.
    发明授权
    Antenna circuit for an MRI system 有权
    用于MRI系统的天线电路

    公开(公告)号：US09297868B2

    公开(公告)日：2016-03-29

    申请号：US13277006

    申请日：2011-10-19

    申请人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

    发明人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

    IPC分类号： G01R33/34 ,  G01R33/36 ,  G01R33/3415

    CPC分类号： G01R33/3607 ,  G01R33/3415 ,  G01R33/3621

    摘要： The present embodiments include an antenna circuit that is adapted to supply and/or read out a plurality of antenna elements of an antenna assembly of a magnetic resonance imaging system. The antenna elements are decoupled by phase shifter elements and supplied with signals by the phase shifter elements. The antenna circuit may also be used to detect signals that are received by the antenna elements.

    摘要翻译： 本实施例包括适于提供和/或读出磁共振成像系统的天线组件的多个天线元件的天线电路。 天线元件由移相器元件解耦并由移相器元件提供信号。 天线电路还可以用于检测由天线元件接收的信号。

    ARRANGEMENT TO TRANSMIT MAGNETIC RESONANCE SIGNALS
    2.
    发明申请
    ARRANGEMENT TO TRANSMIT MAGNETIC RESONANCE SIGNALS 有权
    发射磁共振信号的安排

    公开(公告)号：US20090286478A1

    公开(公告)日：2009-11-19

    申请号：US12465147

    申请日：2009-05-13

    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： H04B7/00

    CPC分类号： G01R33/3664 ,  G01R33/3415 ,  G01R33/3607 ,  G01R33/3621 ,  G01R33/3635

    摘要： An arrangement for transmitting magnetic resonance signals, with a transmission link that connects a local coil with a receiver, has a first channel of the local coil with a first single antenna to acquire a first magnetic resonance signal, as well as a first mixer connected with the first single antenna. The first mixer forms an intermediate-frequency first signal from the supplied first magnetic resonance signal. A second channel of the local coil has a second single antenna to acquire a second magnetic resonance signal, as well as a second mixer connected with the second single antenna. The second mixer forms an intermediate-frequency second signal from the supplied second magnetic resonance signal. The local coil has a device for signal combination that, by frequency multiplexing, that combines the intermediate-frequency first signal of the first channel and the intermediate-frequency second signal of the second channel so that it arrives at the receiver via the transmission path. The receiver has an A/D converter at which one of the transmitted intermediate-frequency signals of an associated channel arrives in order to be sampled with a sampling frequency for digitization. For frequency conversion, a first local oscillator frequency is connected at the first mixer and a second local oscillator frequency is connected at the second mixer. the first and second local oscillator frequencies are selected such that intermediate-frequencies formed by the frequency conversion are mirror-symmetrical relative to the sampling frequency of the A/D converter.

    摘要翻译： 用于传输磁共振信号的装置，具有将本地线圈与接收器连接的传输链路，具有本地线圈的第一通道和第一单个天线以获取第一磁共振信号，以及与第 第一单天线。 第一混频器从所提供的第一磁共振信号形成中频第一信号。 本地线圈的第二通道具有用于获取第二磁共振信号的第二单个天线，以及与第二单个天线连接的第二混频器。 第二混频器从所提供的第二磁共振信号形成中频第二信号。 本地线圈具有用于信号组合的装置，通过频率复用，组合第一通道的中频第一信号和第二通道的中频第二信号，使得其经由传输路径到达接收器。 接收机具有A / D转换器，在该A / D转换器中，相关信道的所发送的中频信号中的一个到达，以便以用于数字化的采样频率进行采样。 对于频率转换，在第一混频器处连接第一本地振荡器频率，在第二混频器处连接第二本地振荡器频率。 选择第一和第二本地振荡器频率，使得由频率变换形成的中频相对于A / D转换器的采样频率是镜像对称的。

    Magnetic Resonance Imaging
    6.
    发明申请
    Magnetic Resonance Imaging 审中-公开
    磁共振成像

    公开(公告)号：US20150362578A1

    公开(公告)日：2015-12-17

    申请号：US14738884

    申请日：2015-06-13

    申请人： Stephan Biber ,  Daniel Niederlöhner ,  Andreas Schmidt ,  Markus Vester

    发明人： Stephan Biber ,  Daniel Niederlöhner ,  Andreas Schmidt ,  Markus Vester

    IPC分类号： G01R33/565 ,  G01R33/3875 ,  G01R33/48

    CPC分类号： G01R33/3875 ,  G01R33/243 ,  G01R33/4828 ,  G01R33/56536

    摘要： In order to enable efficient calculation of shim settings for a magnetic resonance imaging system, a method for magnetic resonance imaging of an object under investigation using a magnetic resonance device is provided. The method includes acquiring first magnetic resonance image data of the object under investigation using the magnetic resonance device. The method also includes segmenting the first magnetic resonance image data into at least two material classes, calculating a B0 map based on the segmented first magnetic resonance image data and based on susceptibility values of the at least two material classes, and calculating shim settings based on the calculated B0 map. The method also includes acquiring second magnetic resonance image data of the object under investigation using the magnetic resonance device. The acquisition of the second magnetic resonance image data is undertaken using the calculated shim settings.

    摘要翻译： 为了能够有效地计算磁共振成像系统的垫片设置，提供了一种使用磁共振装置对被研究对象进行磁共振成像的方法。 该方法包括使用磁共振装置获取被研究对象的第一磁共振图像数据。 该方法还包括将第一磁共振图像数据分成至少两种材料类别，基于分割的第一磁共振图像数据计算B0图，并且基于至少两种材料类别的磁化率值，以及基于 计算出B0图。 该方法还包括使用磁共振装置获取被研究对象的第二磁共振图像数据。 使用计算的垫片设置进行第二磁共振图像数据的采集。

    Magnetic resonance device, reflector array and high-frequency shield system for a magnetic resonance device
    7.
    发明授权
    Magnetic resonance device, reflector array and high-frequency shield system for a magnetic resonance device 有权
    用于磁共振装置的磁共振装置，反射器阵列和高频屏蔽系统

    公开(公告)号：US08766632B2

    公开(公告)日：2014-07-01

    申请号：US13240026

    申请日：2011-09-22

    申请人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

    发明人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

    IPC分类号： G01V3/00

    CPC分类号： G01R33/422 ,  G01R33/34007 ,  G01R33/3415 ,  G01R33/3642

    摘要： A magnetic resonance device with a measurement chamber, an antenna arrangement that has a plurality of antenna elements arranged at least in certain areas around the measurement chamber, a gradient coil system arranged outside the antenna arrangement as seen from the measurement chamber, and a high-frequency shield system arranged between the antenna arrangement and the gradient coil system are provided. The high-frequency shield system has a reflector array with a plurality of passive reflector resonance circuits, each of which is configured such that resonance frequencies of the plurality of passive reflector resonance circuits lie below an operating magnetic resonance frequency of the magnetic resonance device and that the plurality of passive reflector resonance circuits has an inductive overall impedance.

    摘要翻译： 一种具有测量室的磁共振装置，至少在测量室周围的某些区域中布置有多个天线元件的天线装置，从测量室观察时布置在天线装置外部的梯度线圈系统， 设置在天线装置和梯度线圈系统之间的频率屏蔽系统。 高频屏蔽系统具有多个无源反射器谐振电路的反射器阵列，每个被动反射器谐振电路被配置为使得多个无源反射器谐振电路的谐振频率低于磁共振装置的工作磁共振频率，并且 多个无源反射器谐振电路具有感应整体阻抗。

    MR signal transmission in a local coil arrangement
    8.
    发明授权
    MR signal transmission in a local coil arrangement 有权
    局部线圈布置中的MR信号传输

    公开(公告)号：US08487622B2

    公开(公告)日：2013-07-16

    申请号：US12893286

    申请日：2010-09-29

    申请人： Stephan Biber ,  Jan Bollenbeck ,  Markus Vester

    发明人： Stephan Biber ,  Jan Bollenbeck ,  Markus Vester

    IPC分类号： G01V3/00

    CPC分类号： G01R33/3692 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/3621 ,  G01R33/422

    摘要： In a magnetic resonance tomography local coil arrangement and a method for processing signals received thereby, at least one local coil is fashioned to receive at least one reception signal and at least one amplifier is provided that amplifies the at least one reception signal. A frequency converter generates at least one intermediate frequency signal from the at least one reception signal the intermediate frequency of the intermediate frequency signal differing from the reception signal frequency of each reception signal. An analog-digital converter converts the analog intermediate frequency signal into a digitized signal. A shielding device shields against at least radio-frequency signals, the shielding device surrounding at least the analog-digital converter. At least one frequency filter is arranged between the at least one local coil and the analog-digital converter, the frequency filter exhibiting a transmission range for signals with the intermediate frequency of an intermediate frequency signal. The digitized signal is transmitted from the local coil arrangement.

    摘要翻译： 在磁共振断层摄影局部线圈装置和用于处理由此接收的信号的方法中，形成至少一个局部线圈以接收至少一个接收信号，并且提供放大至少一个接收信号的至少一个放大器。 变频器从至少一个接收信号产生至少一个中频信号，该中频信号与每个接收信号的接收信号频率不同。 模拟数字转换器将模拟中频信号转换为数字化信号。 屏蔽装置至少屏蔽射频信号，屏蔽装置至少围绕模拟数字转换器。 在至少一个本地线圈和模数转换器之间布置至少一个频率滤波器，该频率滤波器对于具有中频信号的中频的信号呈现传输范围。 数字化信号从本地线圈装置发送。

    Arrangement to transmit magnetic resonance signals via multiplexed multiplexer reception branches
    9.
    发明授权
    Arrangement to transmit magnetic resonance signals via multiplexed multiplexer reception branches 有权
    通过多路复用器接收分支传送磁共振信号的布置

    公开(公告)号：US07834628B2

    公开(公告)日：2010-11-16

    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： G01V3/00

    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。

    ARRANGEMENT FOR TRANSMISSION OF MAGNETIC RESONANCE SIGNALS
    10.
    发明申请
    ARRANGEMENT FOR TRANSMISSION OF MAGNETIC RESONANCE SIGNALS 有权
    磁共振信号传输的安排

    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。