公开(公告)号：US09733321B2

公开(公告)日：2017-08-15

申请号：US13854928

申请日：2013-04-01

申请人： Sebastian Martius ,  Markus Vester

发明人： Sebastian Martius ,  Markus Vester

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

CPC分类号： G01R33/34 ,  G01R33/34015 ,  G01R33/3415 ,  G01R33/3692

摘要： A magnetic resonance tomography apparatus includes a receiving device having a number of magnetic resonance receive antennas for receiving a magnetic resonance signal in response to a radio frequency signal transmitted at a magnetic resonance frequency. A respective magnetic resonance receive antenna is connected to a parametric mixer. A receive circuit formed hereby is provided inside the cryostat and is coupled via a contactless communication interface to an evaluation circuit provided outside the cryostat. The evaluation circuit includes a local oscillator device for generating an auxiliary signal at an auxiliary frequency. The auxiliary signal is transmitted via the contactless communication interface to the receive circuit. The receive circuit is configured such that a mixed signal having a mixed frequency is generated via the parametric mixer from the auxiliary signal and the magnetic resonance signal and transmitted via the contactless communication interface to the evaluation circuit.

公开(公告)号：US20160216346A1

公开(公告)日：2016-07-28

申请号：US14997071

申请日：2016-01-15

申请人： Robert Rehner ,  Markus Vester

发明人： Robert Rehner ,  Markus Vester

IPC分类号： G01R33/36 ,  G01R33/46

CPC分类号： G01R33/24 ,  G01R33/34053 ,  G01R33/422 ,  G01R33/56563 ,  G01R33/58

摘要： The embodiments relate to a method and field probes for measuring a static and/or in particular a dynamic magnetic field in an imaging magnetic resonance tomography system, wherein the field probe includes a body surrounded by a coil. The coil includes a middle or center winding section and at least one or two outer winding sections.

摘要翻译： 这些实施例涉及用于测量成像磁共振断层摄影系统中的静态和/或特别是动态磁场的方法和场探头，其中场探头包括被线圈包围的身体。 线圈包括中间绕组部分和中心绕组部分以及至少一个或两个外部绕组部分。

公开(公告)号：US09395426B2

公开(公告)日：2016-07-19

申请号：US13560780

申请日：2012-07-27

申请人： Andre Albsmeier ,  Jan Bollenbeck ,  Daniel Evers ,  Klaus Pistor ,  Stefan Schwarzer ,  Markus Vester

发明人： Andre Albsmeier ,  Jan Bollenbeck ,  Daniel Evers ,  Klaus Pistor ,  Stefan Schwarzer ,  Markus Vester

IPC分类号： G01R33/36 ,  A61B5/055 ,  G01R33/28 ,  G01R33/3415

CPC分类号： G01R33/36 ,  A61B5/055 ,  G01R33/288 ,  G01R33/3415 ,  G01R33/3692

摘要： A method for wireless transfer of energy to a local coil system for a magnetic resonance system is provided. The method includes determining an energy requirement value representing a minimum energy level to be fed to the local coil system, so that the local coil system may carry out a predetermined function over a predetermined time period. Energy is transferred adaptively to the local coil system depending on the energy requirement value.

摘要翻译： 提供了一种将能量无线传递到用于磁共振系统的局部线圈系统的方法。 该方法包括确定表示要馈送到局部线圈系统的最小能级的能量需求值，使得局部线圈系统可以在预定时间段内执行预定功能。 能量根据能量需求值自适应地转移到局部线圈系统。

公开(公告)号：US20150323623A1

公开(公告)日：2015-11-12

申请号：US14705576

申请日：2015-05-06

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

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

IPC分类号： G01R33/36 ,  G01R33/385 ,  G01R33/561 ,  G01R33/34

CPC分类号： G01R33/365 ,  G01R33/34076 ,  G01R33/34092 ,  G01R33/3415 ,  G01R33/3657 ,  G01R33/385 ,  G01R33/5612

摘要： A magnetic resonance imaging (MRI) system includes a plurality of transmitters to generate a parallel transmission radio frequency (RF) pulse, an array of coils coupled to the plurality of transmitters to apply the parallel transmission RF pulse to a subject, and a decoupling system connected to the plurality of transmitters and the array of coils. The decoupling system includes a plurality of hybrid couplers, each hybrid coupler of the plurality of hybrid couplers being coupled to a respective pair of the plurality of transmitters and to a respective pair of the array of coils. The plurality of hybrid couplers are configured to diagonalize an impedance matrix of the plurality of coils.

摘要翻译： 磁共振成像（MRI）系统包括多个发射器以产生并行传输射频（RF）脉冲，耦合到多个发射器的线圈阵列以将并行发射RF脉冲施加到对象，以及解耦系统 连接到多个发射器和线圈阵列。 解耦系统包括多个混合耦合器，多个混合耦合器的每个混合耦合器耦合到相应的多个发射器对以及相应的一对线圈阵列。 多个混合耦合器被配置为使多个线圈的阻抗矩阵对角化。

公开(公告)号：US20150241528A1

公开(公告)日：2015-08-27

申请号：US14632154

申请日：2015-02-26

申请人： Andreas Fackelmeier ,  Sebastian Martius ,  Robert Rehner ,  Christopher Stumpf ,  Markus Vester

发明人： Andreas Fackelmeier ,  Sebastian Martius ,  Robert Rehner ,  Christopher Stumpf ,  Markus Vester

IPC分类号： G01R33/36 ,  G01R33/48 ,  G01R33/34

CPC分类号： G01R33/3657 ,  G01R33/34023

摘要： An arrangement includes a superconducting split ring resonator, a cryostat, and a copper coil. The resonator is arranged in the cryostat and includes at least one ring-shaped conductor made of a superconducting material and including an opening and a taper. The copper coil may be used to transmit a MRI excitation signal. This signal causes a current to be induced in the conductor that leads to the breakdown of the superconductivity. The conductor is detuned and therefore no longer develops an interfering effect. It is possible for the effect of the breakdown of superconductivity to be used for detuning in a targeted manner. After the transmission is complete, the conductor returns into the superconducting state and acts as a superconducting reception antenna for the MRI measurement signal. The copper coil is inductively coupled to the conductor and configured to read out the signal induced in the conductor.

摘要翻译： 一种装置包括超导分裂环谐振器，低温恒温器和铜线圈。 谐振器布置在低温恒温器中，并且包括由超导材料制成并且包括开口和锥形的至少一个环形导体。 铜线圈可用于传输MRI激励信号。 该信号导致导体中导致的电流导致超导性的破坏。 导体失谐，因此不再产生干扰效应。 有可能以有目的的方式将超导性破坏的效果用于失谐。 传输完成后，导体返回超导状态，作为MRI测量信号的超导接收天线。 铜线圈感应耦合到导体并且被配置为读出在导体中感应的信号。

公开(公告)号：US20150061681A1

公开(公告)日：2015-03-05

申请号：US14468937

申请日：2014-08-26

申请人： Wolfgang Renz ,  Markus Vester

发明人： Wolfgang Renz ,  Markus Vester

IPC分类号： G01R33/36

CPC分类号： G01R33/36 ,  G01R33/288 ,  G01R33/3607 ,  G01R33/3635 ,  G01R33/3678

摘要： The embodiments relate to a method, a MRI device, and a circuit for an imaging magnetic resonance imaging device that includes at least one transmission coil for transmitting a magnetic field, where the circuit includes a hybrid coupler and at least one phase shifter that may be or are arranged in the transmission path between an amplifier and at least one transmission coil of the magnetic resonance imaging device.

摘要翻译： 实施例涉及一种用于成像磁共振成像装置的方法，MRI装置和电路，其包括用于传输磁场的至少一个传输线圈，其中电路包括混合耦合器和至少一个移相器 或者布置在放大器与磁共振成像装置的至少一个传输线圈之间的传输路径中。

公开(公告)号：US20150048823A1

公开(公告)日：2015-02-19

申请号：US14340990

申请日：2014-07-25

申请人： Andreas Fackelmeier ,  Sebastian Martius ,  Markus Vester

发明人： Andreas Fackelmeier ,  Sebastian Martius ,  Markus Vester

IPC分类号： G01R33/34

CPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/3642 ,  G01R33/3685

摘要： An antenna apparatus is described, for receiving magnetic resonance signals from an examination object during magnetic resonance imaging using a magnetic resonance device. The antenna apparatus includes a resonator with a plurality of electrically conductive conductor loops, which are each interrupted by a number of electrically insulating slits. The antenna apparatus further includes a carrier substrate for holding the conductor loops and a cable connection apparatus having a number of shielding apparatuses. At least one of the number of shielding apparatuses provides a conductive coupling to a virtual ground of at least one conductor loop. Moreover, an antenna array apparatus, a magnetic resonance system and a method for receiving magnetic resonance signals from an examination object during magnetic resonance imaging using a magnetic resonance device are described.

摘要翻译： 描述了一种用于在使用磁共振装置的磁共振成像期间从检查对象接收磁共振信号的天线装置。 天线装置包括具有多个导电导体环的谐振器，每个导电导体环被多个电绝缘狭缝间断。 天线装置还包括用于保持导体环的载体基板和具有多个屏蔽装置的电缆连接装置。 多个屏蔽装置中的至少一个提供与至少一个导体环路的虚拟接地的导电耦合。 此外，描述了使用磁共振装置的磁共振成像期间的天线阵列装置，磁共振系统和从检查对象接收磁共振信号的方法。

公开(公告)号：US08779771B2

公开(公告)日：2014-07-15

申请号：US13213253

申请日：2011-08-19

申请人： Bjoern Heismann ,  Sebastian Schmidt ,  Markus Vester ,  Anke Weissenborn

发明人： Bjoern Heismann ,  Sebastian Schmidt ,  Markus Vester ,  Anke Weissenborn

IPC分类号： G01V3/00

CPC分类号： A61B5/055 ,  A61B5/0263 ,  A61B5/4064

摘要： In a magnetic resonance marking system marking a flowing medium in a marking region, as well as in a magnetic resonance system with such a magnetic resonance marking system, a method to control a magnetic resonance marking system, and a method to generate magnetic resonance exposures, a radio-frequency transmission device generates marking radio-frequency signals, and a marking radio-frequency transmission coil emits the marking radio-frequency signals in the marking region. A magnetic field determination device determines a magnetic field strength in the marking region, and a control unit derives a marking transmission frequency from the determined magnetic field strength and to control the radio-frequency transmission device so that marking radio-frequency signals at the derived marking transmission frequency are emitted by the marking radio-frequency transmission coil.

摘要翻译： 在标记区域中的流动介质的磁共振标记系统中，以及在具有这种磁共振标记系统的磁共振系统中，控制磁共振标记系统的方法和产生磁共振曝光的方法， 射频发送装置生成标记射频信号，标记射频发送线圈在标记区域发出标记射频信号。 磁场确定装置确定标记区域中的磁场强度，并且控制单元从确定的磁场强度导出标记传输频率，并且控制射频传输装置，从而在导出的标记处标记射频信号 传输频率由标记射频发射线圈发射。

公开(公告)号：US20130271143A1

公开(公告)日：2013-10-17

申请号：US13861249

申请日：2013-04-11

申请人： Markus Vester

发明人： Markus Vester

IPC分类号： G01R33/36

CPC分类号： G01R33/3628 ,  G01R33/365

摘要： A magnetic resonance coil arrangement for a magnetic resonance device includes at least two coil elements that may be read and/or controlled via an amplifier, and a matching circuit for power and/or noise matching between the at least two coil elements and the amplifier. Components of the matching circuit are dimensioned for wideband matching to a frequency band. The frequency band is limited by outermost relevant coupling modes that are displaced from the resonant frequency. The coupling modes occur due to the interaction of a coil element with at least one adjacent coil element.

摘要翻译： 用于磁共振装置的磁共振线圈装置包括可以经由放大器读取和/或控制的至少两个线圈元件，以及用于至少两个线圈元件和放大器之间的功率和/或噪声匹配的匹配电路。 匹配电路的组件的尺寸用于与频带的宽带匹配。 频带受到从谐振频率偏移的最外面的相关耦合模式的限制。 耦合模式由于线圈元件与至少一个相邻的线圈元件的相互作用而发生。

公开(公告)号：US08547097B2

公开(公告)日：2013-10-01

申请号：US12823177

申请日：2010-06-25

申请人： Matthias Gebhardt ,  Markus Vester

发明人： Matthias Gebhardt ,  Markus Vester

IPC分类号： G01V3/00 ,  G01R33/48

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

摘要： In a device and a method to determine SAR for a magnetic resonance tomography transmission system with multiple antenna elements, a single-column cross-correlation matrix of an antenna element matrix of antenna element values of multiple antenna elements of the magnetic resonance tomography transmission system is determined for each of multiple points in time or time periods. These single-column cross-correlation matrices are added into a sum cross-correlation matrix over a summation time period and the sum cross-correlation matrix is multiplied with a hotspot sensitivity matrix. The hotspot sensitivity matrix represents the sensitivities in at least one direction at a number of hotspot points in a subject located in the magnetic resonance tomography transmission system. The product of the sum cross-correlation matrix and the hotspot sensitivity matrix is multiplied with a value representing the dielectricity at least one hotspot point in order to determine a respective SAR value for hotspot points. If at least one SAR value exceeds a predetermined upper limit, the voltage applied to at least one antenna element or the current flowing in at least one antenna element is reduced or deactivated.

摘要翻译： 在用于确定具有多个天线元件的磁共振断层摄影传输系统的SAR的装置和方法中，磁共振断层摄影传输系统的多个天线元件的天线元素值的天线元素矩阵的单列互相关矩阵是 确定在时间或时间段的多个点的每个。 这些单列互相关矩阵通过求和时间周期加到和互相关矩阵中，并且和互相关矩阵乘以热点灵敏度矩阵。 热点灵敏度矩阵表示在位于磁共振断层摄影传输系统中的被摄体的多个热点处的至少一个方向上的灵敏度。 将和互相关矩阵和热点灵敏度矩阵的乘积乘以表示至少一个热点的电介质的值，以便确定热点的相应SAR值。 如果至少一个SAR值超过预定的上限，则施加到至少一个天线元件的电压或者在至少一个天线元件中流动的电流被减少或去激活。