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。

公开(公告)号：US07145335B2

公开(公告)日：2006-12-05

申请号：US10910893

申请日：2004-08-04

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： G01R33/422 ,  G01R33/3854

摘要： A magnetic resonance apparatus with a hollow interior and with a gradient coil system disposed in the hollow interior, wherein the hollow interior exhibits a barrel-like bulge, the gradient coil system is essentially enclosed by a radio-frequency shield, and he radio-frequency shield is fashioned free of a slotting in regions in which it, with regard to a boundary of the hollow interior is at a shorter distance compared with a middle region of the bulge.

摘要翻译： 具有中空内部并具有设置在中空内部的梯度线圈系统的磁共振装置，其中中空内表面呈筒状凸起，该梯度线圈系统基本上被射频屏蔽封闭，并且其射频 在与凸起的中间区域相比，中空内部的边界处于较短距离的区域中，护罩被制成没有开槽。

公开(公告)号：US07061243B2

公开(公告)日：2006-06-13

申请号：US10909517

申请日：2004-08-02

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 ,  G01R33/3873 ,  G01R33/422

摘要： A time-varying magnetic fields generator for a magnetic resonance apparatus has at least one gradient coil and one radio-frequency antenna, gradient coil being formed by two essentially hollow-cylindrical units that are axially separated from one another and that contain conductors of the gradient coil, and that each have at least one axial free space proceeding therethrough to accommodate a shim device, and at least one hollow conductor of the radio-frequency antenna is disposed between the units such that its hollow interior axially communicates with and continues at least one of the free spaces.

摘要翻译： 用于磁共振装置的时变磁场发生器具有至少一个梯度线圈和一个射频天线，梯形线圈由两个基本上为中空的圆柱形单元形成，它们彼此轴向分离并且包含梯度的导体 线圈，并且每个具有至少一个轴向自由空间进入其中以容纳垫片装置，并且所述射频天线的至少一个空心导体设置在所述单元之间，使得其中空内部轴向连通并且继续至少一个 的自由空间。

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：US09829549B2

公开(公告)日：2017-11-28

申请号：US13890128

申请日：2013-05-08

申请人： Ludwig Eberler ,  Jürgen Nistler ,  Markus Vester

发明人： Ludwig Eberler ,  Jürgen Nistler ,  Markus Vester

IPC分类号： G01R33/34 ,  G01R33/422 ,  G01R33/36 ,  G01R33/48 ,  G01R33/563

CPC分类号： G01R33/34092 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/3628 ,  G01R33/422 ,  G01R33/4806 ,  G01R33/56341

摘要： A whole-body coil for a magnetic resonance tomography device includes one or more compensation capacitors between a high-frequency antenna and an RF shield. The one or more compensation capacitors each have variable capacitance caused by a variation in a distance of the RF shield to the high-frequency antenna.

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：US07626392B2

公开(公告)日：2009-12-01

申请号：US12222777

申请日：2008-08-15

申请人： Jürgen Nistler ,  Wolfgang Renz ,  Stefan Stocker

发明人： Jürgen Nistler ,  Wolfgang Renz ,  Stefan Stocker

IPC分类号： G01V3/00

CPC分类号： G01R33/481 ,  G01R33/34046 ,  G01R33/422

摘要： An antenna unit for a PET/MRI scanner is disclosed, including a supporting tube in which at least one antenna for MR signals is arranged. In at least one embodiment, the supporting tube has at least one permeable section and one impermeable section, the permeable section of which has a greater permeability to PET quanta than the impermeable section. The antenna unit further includes a screen for radio-frequency signals which is arranged outside of the supporting tube and surrounds the latter. In at least one embodiment, an intermediate layer is arranged between the supporting tube and the screen and, in the region of the permeable section of the supporting tube, is composed of, at least in part, a material which has a permeability to PET quanta comparable to the permeable section.

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：US20160146908A1

公开(公告)日：2016-05-26

申请号：US14938255

申请日：2015-11-11

申请人： Michael Köhler ,  Wilfried Landschütz ,  Jürgen Nistler ,  Markus Vester

发明人： Michael Köhler ,  Wilfried Landschütz ,  Jürgen Nistler ,  Markus Vester

IPC分类号： G01R33/24 ,  G06T7/00 ,  G06T3/40 ,  G01R33/565

CPC分类号： G01R33/246 ,  G01R33/5659

摘要： In a method, by a magnetic resonance device, a transmit B1 field map is determined for a region, a plurality of MR images of at least one part of the region are acquired using transmitter settings differing from each other, and signal intensities of individual pixels measured by the MR images are interpolated by the transmit B1 field map. A correction of the signal intensities may also be effected by carrying out a receive B1 correction by a spatial mirroring of the transmit B1 field map on a symmetry plane of a measured object. A magnetic resonance device is used to carry out the method. The method may be applied, for example, in medical diagnostics.

摘要翻译： 在一种方法中，通过磁共振装置，为区域确定发射B1场图，使用彼此不同的发射机设置获取区域的至少一部分的多个MR图像，以及各个像素的信号强度 由MR图像测量由发送B1场图进行内插。 信号强度的校正也可以通过在测量对象的对称平面上通过发射B1场图的空间镜像进行接收B1校正来实现。 磁共振装置用于执行该方法。 该方法可以应用于例如医学诊断。