公开(公告)号：US09983280B2

公开(公告)日：2018-05-29

申请号：US14249926

申请日：2014-04-10

申请人： Jia Heng Tan ,  Tong Tong ,  Markus Vester ,  JianMin Wang

发明人： Jia Heng Tan ,  Tong Tong ,  Markus Vester ,  JianMin Wang

IPC分类号： G01R33/36 ,  G01R33/34 ,  G01R33/341

CPC分类号： G01R33/3657 ,  G01R33/341

摘要： A local coil for an MRI system includes a signal antenna to receive a magnetic resonance signal and a tuning/detuning circuit to subject the signal antenna part to switch control according to a control signal. The tuning/detuning circuit is connected to the signal antenna part. The tuning/detuning circuit includes a control signal interface, a resonant circuit and an AC/DC conversion circuit. The control signal interface receives the control signal. The resonant circuit includes a diode. The AC/DC conversion circuit converts an alternating current generated by an electromagnetic wave to a direct current. The AC/DC conversion circuit is connected in series with the diode. A small detuning control current may be used, and detuning control circuitry may be reduced.

公开(公告)号：US09817089B2

公开(公告)日：2017-11-14

申请号：US13722606

申请日：2012-12-20

申请人： Stephan Biber ,  Jan Bollenbeck ,  Ralph Oppelt ,  Georg Rauh ,  Wilfried Schnell ,  Markus Vester

发明人： Stephan Biber ,  Jan Bollenbeck ,  Ralph Oppelt ,  Georg Rauh ,  Wilfried Schnell ,  Markus Vester

IPC分类号： G01R33/30 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/563

CPC分类号： G01R33/30 ,  G01R33/3415 ,  G01R33/3664 ,  G01R33/56383

摘要： A selection unit for a magnetic resonance imaging system may be provided. The selection unit electrically connects a first number of electrical terminals to a second number of communication entities. The selection unit is arranged in and/or on a mobile object-support element for moving an examination object which is to be depicted by the magnetic resonance imaging system into a recording position.

公开(公告)号：US09810752B2

公开(公告)日：2017-11-07

申请号：US14483795

申请日：2014-09-11

申请人： Stephan Biber ,  Jan Bollenbeck ,  Markus Vester ,  JianMin Wang

发明人： Stephan Biber ,  Jan Bollenbeck ,  Markus Vester ,  JianMin Wang

IPC分类号： G01R33/341 ,  G01R33/54 ,  G01R33/36 ,  G01R33/385 ,  G01R33/3415

CPC分类号： G01R33/341 ,  G01R33/3415 ,  G01R33/3621 ,  G01R33/3664 ,  G01R33/3852 ,  G01R33/54

摘要： A method and an apparatus for a magnetic resonance imaging system are provided. A type of further processing of signals transmitted by a local coil to a magnetic resonance imaging (MRI) system is determined in dependence on information received in or from the local coil about a local-coil type of the local coil.

公开(公告)号：US20170160367A1

公开(公告)日：2017-06-08

申请号：US15368607

申请日：2016-12-03

申请人： Steffen Schröter ,  Jan Bollenbeck ,  Matthias Fenchel ,  Peter Speier ,  Markus Vester

发明人： Steffen Schröter ,  Jan Bollenbeck ,  Matthias Fenchel ,  Peter Speier ,  Markus Vester

IPC分类号： G01R33/565 ,  G01R33/36

CPC分类号： G01R33/56509 ,  G01R33/3607 ,  G01R33/3614 ,  G01R33/3657 ,  G01R33/3692

摘要： A transmitter for pilot tone navigation in a magnetic resonance tomography system includes a power supply and an antenna. The transmitter is configured to transmit a pilot tone signal via the antenna. The transmitter also includes a decoupling element in order to protect a transmitter output from signals that the antenna receives with excitation pulses of the magnetic resonance tomography system during a magnetic resonance tomography. In a method, movement-dependent changes to the pilot tone signal of the transmitter are identified by a controller of the magnetic resonance tomography system.

公开(公告)号：US20170074953A1

公开(公告)日：2017-03-16

申请号：US15266042

申请日：2016-09-15

申请人： Nikolaus Demharter ,  Markus Vester ,  Volker Weißenberger

发明人： Nikolaus Demharter ,  Markus Vester ,  Volker Weißenberger

IPC分类号： G01R33/341 ,  G01R31/06

CPC分类号： G01R33/341 ,  G01R31/06 ,  G01R33/288 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/36 ,  G01R33/3692

摘要： A local transmit coil for a magnetic resonance tomograph is provided. The local transmit coil includes a signal transmission device for signal transmission to the magnetic resonance tomograph, and a transmission antenna for generating a magnetic excitation field. The local transmit coil further includes an evaluation device for monitoring a function of the local transmit coil. The evaluation device is configured to transmit a status signal relating to the local transmit coil via the signal transmission device.

摘要翻译： 提供了一种用于磁共振断层扫描仪的局部发射线圈。 局部发射线圈包括用于信号传输到磁共振断层摄影机的信号传输装置和用于产生磁激励场的发射天线。 本地发送线圈还包括用于监视本地发送线圈的功能的评估装置。 评估装置经由信号传输装置发送与本地发送线圈相关的状态信号。

公开(公告)号：US09488706B2

公开(公告)日：2016-11-08

申请号：US13440552

申请日：2012-04-05

申请人： Markus Vester

发明人： Markus Vester

IPC分类号： H03F3/24 ,  G01R33/36

CPC分类号： G01R33/3607 ,  G01R33/3614 ,  H03F3/24 ,  H03F2200/324 ,  H03F2200/351

摘要： A transmitting device for driving a high-frequency antenna of a magnetic-resonance device using a target signal capable of being amplitude-modulated is provided. A number N of similarly embodied amplifier modules, where N is at least two, a signal-conditioning device, and a combining device for combining output signals of the amplifier modules into the target signal are provided. The signal-conditioning device generates N drive signals having a predetermined pulse frequency that consist of pulses having a length dependent on a desired target amplitude and having a phase corresponding to the desired target phase and a frequency corresponding to the desired target frequency. The pulses of the individual drive signals are mutually offset in time by, in each case, 1/N of a pulse period corresponding to the pulse frequency. Each drive signal is fed to an amplifier module.

摘要翻译： 提供一种使用能够进行幅度调制的目标信号来驱动磁共振装置的高频天线的发送装置。 提供了N个类似实施例的放大器模块，其中N是至少两个，信号调节装置和用于将放大器模块的输出信号组合成目标信号的组合装置。 信号调节装置产生具有预定脉冲频率的N个驱动信号，该脉冲频率由具有取决于期望目标幅度的长度的脉冲组成，并且具有对应于期望目标相位的相位和对应于期望目标频率的频率。 各个驱动信号的脉冲在时间上相互偏移，在每种情况下，与脉冲频率相对应的脉冲周期的1 / N。 每个驱动信号被馈送到放大器模块。

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。

公开(公告)号：US08994374B2

公开(公告)日：2015-03-31

申请号：US13432437

申请日：2012-03-28

申请人： Andre Albsmeier ,  Jan Bollenbeck ,  Klaus Pistor ,  Florian Poprawa ,  Stefan Schwarzer ,  Markus Vester ,  Thomas Wuchenauer

发明人： Andre Albsmeier ,  Jan Bollenbeck ,  Klaus Pistor ,  Florian Poprawa ,  Stefan Schwarzer ,  Markus Vester ,  Thomas Wuchenauer

IPC分类号： G01V3/00 ,  G01R33/36 ,  G01R33/3415

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

摘要： A local coil system for a magnetic resonance system has a local coil for detecting MR response signals and a transmitter for wirelessly transmitting signals to the magnetic resonance system. At least one pseudo random device is operable to change signals in a pseudo random fashion in order to avoid interferences in the imaging.

摘要翻译： 用于磁共振系统的局部线圈系统具有用于检测MR响应信号的本地线圈和用于将信号无线传输到磁共振系统的发射器。 至少一个伪随机设备可操作以伪随机方式改变信号，以避免成像中的干扰。

公开(公告)号：US20140292337A1

公开(公告)日：2014-10-02

申请号：US13918461

申请日：2013-06-14

申请人： Elfar Adalsteinsson ,  Luca Daniel ,  Bastien Guerin ,  Zohaib Mahmood ,  Markus Vester ,  Lawrence Wald

发明人： Elfar Adalsteinsson ,  Luca Daniel ,  Bastien Guerin ,  Zohaib Mahmood ,  Markus Vester ,  Lawrence Wald

IPC分类号： G01R33/36

CPC分类号： G01R33/365 ,  G01R33/5612

摘要： A method of determining a decoupling matrix of a decoupling system for an array of coils of a parallel transmission magnetic resonance imaging (MRI) system includes obtaining impedance matrix data for the array of coils without the decoupling system, determining, based on the impedance matrix data for the array of coils, an objective function representative of deviation from a decoupled operating condition for the array of coils in which the array of coils are decoupled via the decoupling system, and defining, with a processor, a decoupling matrix representative of a set of impedances of the decoupling system with an iterative procedure that optimizes elements of the decoupling matrix to minimize the objective function and reach the decoupled operating condition.

摘要翻译： 确定并行传输磁共振成像（MRI）系统的线圈阵列的去耦系统的去耦矩阵的方法包括：获得用于没有去耦系统的线圈阵列的阻抗矩阵数据，基于阻抗矩阵数据 对于线圈阵列，表示偏离线圈阵列的去耦工作条件的目标函数，其中线圈阵列经由去耦系统去耦，并且用处理器定义代表一组线圈的去耦矩阵 解耦系统的阻抗具有优化去耦矩阵的元素以最小化目标函数并达到解耦操作条件的迭代过程。

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。