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。

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。

公开(公告)号：US09689940B2

公开(公告)日：2017-06-27

申请号：US13487174

申请日：2012-06-02

申请人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

发明人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

IPC分类号： G01R33/36 ,  G01R33/3415

CPC分类号： G01R33/3692 ,  G01R33/3415

摘要： A local coil system for a magnetic resonance system including at least one local coil for capturing magnetic resonance (MR) signals and at least one energy receiving antenna for inductively receiving energy for the local coil system from a temporally varying magnetic field is provided. The at least one energy receiving antenna is or may be tuned to an energy transfer frequency that is lower than a Larmor frequency of the MR signals to be captured and higher than approximately 20 kHz.

公开(公告)号：US20120098540A1

公开(公告)日：2012-04-26

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

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。

公开(公告)号：US08664956B2

公开(公告)日：2014-03-04

申请号：US13183078

申请日：2011-07-14

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： G01R33/34076

摘要： An antenna arrangement for magnetic resonance applications includes antenna elements substantially parallel to a common central axis, distributed around the central axis at a distance from the central axis, and enclosing an essentially cylindrical volume. The antenna arrangement includes intermediate connections that connect to immediately adjacent antenna elements at connection points that lie between the ends of the antenna elements. A preamplifier connects to each of the intermediate connections and has an output that, in a receive mode, corresponds to a respective feed-out point. In send mode, the antenna arrangement injects radio-frequency signals into the antenna elements using the injection points. The antenna arrangement is also configured to adjust the intermediate connections to a higher resistance when the antenna arrangement is in the send mode and at least some of the intermediate connections to a lower resistance when the antenna arrangement is in the receive mode.

摘要翻译： 用于磁共振应用的天线装置包括基本上平行于公共中心轴线的天线元件，围绕中心轴线分布在与中心轴线一定距离处，并且包围基本上圆柱形的体积。 天线装置包括在位于天线元件的端部之间的连接点处连接到紧邻的天线元件的中间连接。 前置放大器连接到每个中间连接，并且具有在接收模式下对应于相应的馈送点的输出。 在发送模式下，天线装置使用注入点将射频信号注入到天线元件中。 天线装置还被配置为当天线装置处于发送模式时将中间连接调节到更高的电阻，并且当天线装置处于接收模式时，天线装置中的至少一些中间连接到较低电阻。

公开(公告)号：US20120313645A1

公开(公告)日：2012-12-13

申请号：US13487174

申请日：2012-06-02

申请人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

发明人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

IPC分类号： G01R33/341

CPC分类号： G01R33/3692 ,  G01R33/3415

摘要： A local coil system for a magnetic resonance system including at least one local coil for capturing magnetic resonance (MR) signals and at least one energy receiving antenna for inductively receiving energy for the local coil system from a temporally varying magnetic field is provided. The at least one energy receiving antenna is or may be tuned to an energy transfer frequency that is lower than a Larmor frequency of the MR signals to be captured and higher than approximately 20 kHz.

摘要翻译： 提供一种用于磁共振系统的本地线圈系统，其包括用于捕获磁共振（MR）信号的至少一个本地线圈和用于从时间上变化的磁场感应地接收本地线圈系统的能量的能量接收天线。 至少一个能量接收天线是或可以被调谐到低于待捕获的MR信号的拉莫尔频率并高于约20kHz的能量传递频率。

公开(公告)号：US20120068710A1

公开(公告)日：2012-03-22

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： G01R33/30 ,  G01R33/28

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。

公开(公告)号：US20120182013A1

公开(公告)日：2012-07-19

申请号：US13183078

申请日：2011-07-14

申请人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

发明人： Stephan Biber ,  Jürgen Nistler ,  Markus Vester

IPC分类号： G01R33/44

CPC分类号： G01R33/34076

摘要： An antenna arrangement for magnetic resonance applications includes antenna elements substantially parallel to a common central axis, distributed around the central axis at a distance from the central axis, and enclosing an essentially cylindrical volume. The antenna arrangement includes intermediate connections that connect to immediately adjacent antenna elements at connection points that lie between the ends of the antenna elements. A preamplifier connects to each of the intermediate connections and has an output that, in a receive mode, corresponds to a respective feed-out point. In send mode, the antenna arrangement injects radio-frequency signals into the antenna elements using the injection points. The antenna arrangement is also configured to adjust the intermediate connections to a higher resistance when the antenna arrangement is in the send mode and at least some of the intermediate connections to a lower resistance when the antenna arrangement is in the receive mode.

摘要翻译： 用于磁共振应用的天线装置包括基本上平行于公共中心轴线的天线元件，围绕中心轴线分布在与中心轴线一定距离处，并且包围基本上圆柱形的体积。 天线装置包括在位于天线元件的端部之间的连接点处连接到紧邻的天线元件的中间连接。 前置放大器连接到每个中间连接，并且具有在接收模式下对应于相应的馈送点的输出。 在发送模式下，天线装置使用注入点将射频信号注入到天线元件中。 天线装置还被配置为当天线装置处于发送模式时将中间连接调节到更高的电阻，并且当天线装置处于接收模式时，天线装置中的至少一些中间连接到较低电阻。

公开(公告)号：US07173422B2

公开(公告)日：2007-02-06

申请号：US10957434

申请日：2004-10-01

申请人： Jürgen Nistler ,  Stefan Stocker ,  Markus Vester

发明人： Jürgen Nistler ,  Stefan Stocker ,  Markus Vester

IPC分类号： G01R33/20 ,  G01V3/00 ,  H01F5/00

CPC分类号： G01R33/385 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/422

摘要： In one aspect, a generator for generating time-variable magnetic fields is provided. The generator includes a gradient coil having conductors extending in an area defined by a hollow first cylinder, and having no conductors in a central area of the hollow first cylinder, the central area defined by the volume of a second cylinder arranged coaxially with and inside the first cylinder, the second cylinder having a diameter of one third the diameter of the first cylinder. The generator also includes a high frequency shielding device enclosing the central area but not the conductors, a high frequency antenna arranged in the central area; and a coaxial connecting cable operatively connected to the high frequency antenna arranged along a longitudinal axis of the first and second cylinder, the connecting cable penetrating the high frequency shielding device at a plurality of locations.

摘要翻译： 一方面，提供了一种用于产生时变磁场的发生器。 发电机包括一个梯度线圈，其具有在由中空的第一气缸限定的区域中延伸的导体，并且在中空的第一气缸的中心区域中不具有导体，中心区域由第二气缸的体积限定， 第一气缸，第二气缸的直径为第一气缸直径的三分之一。 发电机还包括围绕中心区而不是导体的高频屏蔽装置，布置在中心区域的高频天线; 以及可操作地连接到沿着第一和第二气缸的纵向轴线布置的高频天线的同轴连接电缆，连接电缆在多个位置处穿透高频屏蔽装置。

公开(公告)号：US07098661B2

公开(公告)日：2006-08-29

申请号：US10957435

申请日：2004-10-01

申请人： Jürgen Nistler ,  Stefan Stocker ,  Markus Vester

发明人： Jürgen Nistler ,  Stefan Stocker ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/34076 ,  G01R33/385 ,  G01R33/56518

摘要： A magnetic resonance device with a cavity and with a basic field magnet and a gradient coil system, with the basic field magnet having a cavity that is bounded by an electrically conductive boundary surface of the basic field magnet and in which the gradient coil system is arranged, containing the following features: the gradient coil system has at least two structurally separate units with a clearance between them, with each of the units being enclosed by the high-frequency shield; the high-frequency shield has a short clearance from the boundary surface such that, because of the capacitive coupling between the high-frequency shield and the boundary surface, the high-frequency shield has a high-frequency short circuit to the boundary surface, so that the boundary surface is a surface that is always available for the high-frequency return flow.

摘要翻译： 一种具有空腔并具有基本场磁体和梯度线圈系统的磁共振装置，其中基本场磁体具有由基本场磁体的导电边界面界定的空腔，其中布置有梯度线圈系统 包含以下特征：梯度线圈系统具有至少两个结构上分离的单元，它们之间具有间隙，每个单元由高频屏蔽包围; 高频屏蔽与边界面间隔很短，由于高频屏蔽与边界面之间的电容耦合，高频屏蔽层与边界面有高频短路，所以 边界面是始终可用于高频回流的表面。