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1. 发明授权

US10663543B2 Device and method for recovering a temporal reference in free-running MR receive chains 有权
公开(公告)号：US10663543B2
公开(公告)日：2020-05-26
申请号：US15951156
申请日：2018-04-11
申请人： Stephan Biber , Jan Bollenbeck , Sven Heggen , Martin Nisznansky , Markus Vester
发明人： Stephan Biber , Jan Bollenbeck , Sven Heggen , Martin Nisznansky , Markus Vester
IPC分类号： G01V3/00 , G01R33/36 , G01R33/3415
摘要： A device for recovering a temporal reference in a free-running magnetic resonance tomography (MRT) receive chain includes a time reference encoder and a time reference decoder. The time reference encoder is configured to generate a modulation signal as a function of a reference clock, where the modulation signal is configured for a correlation with a temporal resolution less than a maximum predetermined phase deviation and a maximum that may clearly be identified. The time reference decoder is configured to receive, via the first signal input, a receive signal as a function of the modulation signal, perform a correlation with a reference signal, and generate a signal as a function of a temporal reference of the modulation signal in the receive signal in relation to the reference signal.

2. 发明授权

US10295624B2 Decoupling of parallel transmission arrays in magnetic resonance imaging 有权
公开(公告)号：US10295624B2
公开(公告)日：2019-05-21
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： G01V3/00 , G01R33/36 , G01R33/561
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.

3. 发明授权

US09983280B2 Local coil 有权
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.

4. 发明授权

US09817089B2 MRI antenna coil selection unit within patient table cable duct 有权
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.

5. 发明授权

US09810752B2 Determination of a type of processing of signals transmitted by local coil 有权
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.

6. 发明申请

US20170160367A1 Signal Transmitter for Pilot Tone Navigation 审中-公开
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.

7. 发明申请

US20170074953A1 LOCAL TRANSMIT COIL WITH INTEGRATED SAFETY DEVICE 审中-公开
标题翻译：具有集成安全装置的本地发射线圈
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。

8. 发明授权

US09488706B2 Transmitting device for driving a high-frequency antenna of a magnetic-resonance device 有权
标题翻译：用于驱动磁共振装置的高频天线的发射装置
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。

9. 发明申请

US20160320465A1 DETUNING A MRT RECEIVE ANTENNA 审中-公开
标题翻译：拆除地铁接收天线
公开(公告)号：US20160320465A1
公开(公告)日：2016-11-03
申请号：US15131201
申请日：2016-04-18
申请人： Klaus Huber , Robert Rehner , Markus Vester
发明人： Klaus Huber , Robert Rehner , Markus Vester
IPC分类号： G01R33/36
CPC分类号： G01R33/3657 , G01R33/341
摘要： An arrangement for detuning a receive antenna, a detunable magnetic resonance coil, and a magnetic resonance device having a detunable magnetic resonance coil are provided. The arrangement includes a receive antenna having at least one first capacitance, wherein radiofrequency signals from a magnetic resonance examination may be received by way of the receive antenna. The arrangement furthermore includes a switchable detuning circuit containing the first capacitance switched to form an oscillating circuit and a first inductance, and a switching device having a first and a second connection point to deliver a voltage between the first and a second connection point, and one or more transistors. The switching device switches the oscillating circuit to a high impedance level with aid of the one or more transistors on delivery of a positive voltage to the first connection point, preventing a radiofrequency signal from being received by way of the receive antenna.
摘要翻译：提供了一种用于使接收天线失谐的装置，不可恢复的磁共振线圈和具有不可恢复的磁共振线圈的磁共振装置。该装置包括具有至少一个第一电容的接收天线，其中可以通过接收天线接收来自磁共振检查的射频信号。该装置还包括可切换的失谐电路，其包含切换以形成振荡电路的第一电容和第一电感，以及具有第一和第二连接点以在第一和第二连接点之间传递电压的开关装置，以及一个或更多的晶体管。开关装置在将正电压传送到第一连接点的同时，通过一个或多个晶体管的帮助将振荡电路切换到高阻抗水平，防止射频信号通过接收天线被接收。

10. 发明申请

US20150362578A1 Magnetic Resonance Imaging 审中-公开
标题翻译：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。

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