公开(公告)号：US20050110493A1

公开(公告)日：2005-05-26

申请号：US10953303

申请日：2004-09-29

申请人： Thorsten Feiweier ,  Razvan Lazar ,  Wolfgang Renz ,  Lothar Schon

发明人： Thorsten Feiweier ,  Razvan Lazar ,  Wolfgang Renz ,  Lothar Schon

IPC分类号： G01R33/341 ,  G01V3/00

CPC分类号： G01R33/341

摘要： A local coil unit for a magnetic resonance apparatus, which radiates a radio-frequency field into an examination subject, has a housing and at least a part of the housing is formed of an insulating dielectric material that passively compensates for an inhomogeneity in the high-frequency field in the subject. The material has a relative dielectric value εr of greater than 50, preferably greater than 100, and a dielectric loss factor tan δ of less than 2.5×10−2, preferably less than 1×10−3. In the dielectric material displacement currents are generated which create an additional magnetic field that compensates for the minima in the B1 field as a result of the eddy currents arising in the patient due to the radio-frequency radiation.

摘要翻译： 用于将射频场辐射到检查对象中的磁共振设备的局部线圈单元具有壳体，并且壳体的至少一部分由绝缘电介质材料形成，被动地补偿高频场中的不均匀性， 频率场。 该材料具有大于50，优选大于100的相对电介质值εL r以及低于2.5×10 -2的介电损耗因子tanδ，优​​选地较小 超过1×10 -3 -3。 在电介质材料中，产生位移电流，其产生额外的磁场，其由于射频辐射而在患者体内产生的涡流的结果来补偿B1场中的最小值。

公开(公告)号：US10295622B2

公开(公告)日：2019-05-21

申请号：US14640728

申请日：2015-03-06

申请人： Razvan Lazar ,  Paul Yoe

发明人： Razvan Lazar ,  Paul Yoe

IPC分类号： G01R33/36 ,  G01R33/34 ,  G01R33/56 ,  G01R33/58 ,  G01R33/54

摘要： A method for signaling a tuning of an adjustment parameter of an antenna coil arrangement of a magnetic resonance tomograph includes detecting a deviation between an actual adjustment value of at least one adjustment parameter and a required adjustment value of the at least one adjustment parameter. As a function of the deviation, an acoustic and/or a mechanical signal is output in real time to an operator. A device for signaling a tuning of an adjustment parameter of a coil arrangement of a magnetic resonance tomograph, and a magnetic resonance tomograph operating according to the method and/or containing the device are described.

公开(公告)号：US09599684B2

公开(公告)日：2017-03-21

申请号：US14203180

申请日：2014-03-10

申请人： Razvan Lazar ,  Martin Schramm

发明人： Razvan Lazar ,  Martin Schramm

IPC分类号： G01R33/34 ,  G01R33/28 ,  G01R33/00

CPC分类号： G01R33/34 ,  G01R33/0052 ,  G01R33/28 ,  G01R33/34046 ,  Y10T29/4902

摘要： Mounting for a body coil of a magnetic resonance device is provided. A reversible and universal mounting device for a body coil in the magnetic resonance device is provided. The mounting device includes at least one expanding ring for creating a way of retaining the body coil in a tunnel-shaped magnetic opening of the magnetic resonance device. The mounting device also includes at least one expander that is configured to enable the expanding ring to be mounted on the inside of the tunnel-shaped magnetic opening of the magnetic resonance device by spreading. The mounting device includes at least one mounting element for mechanically supporting the body coil on the expanding ring.

公开(公告)号：US20150042339A1

公开(公告)日：2015-02-12

申请号：US14456422

申请日：2014-08-11

申请人： Razvan Lazar

发明人： Razvan Lazar

IPC分类号： G01R33/385 ,  A61B5/055

CPC分类号： G01R33/3856 ,  A61B5/055 ,  G01R33/3403

摘要： A device for thermal stabilization of a first electrical characteristic of an antenna array of a magnetic resonance tomograph includes a heat exchanger configured for thermal coupling of a component of the device to a heat source. The device also includes a temperature-dependent second electrical characteristic. In a predefined connection to the antenna array, the temperature-dependent second electrical characteristic is configured to compensate for an effect of a temperature-dependent change on the first electrical characteristic of the antenna array in a predetermined temperature range.

摘要翻译： 用于热稳定磁共振断层摄影机的天线阵列的第一电特性的装置包括被配置用于将装置的部件热耦合到热源的热交换器。 该装置还包括依赖于温度的第二电特性。 在与天线阵列的预定义连接中，温度依赖的第二电特性被配置为补偿在预定温度范围内对天线阵列的第一电特性的温度依赖性变化的影响。

公开(公告)号：US08358133B2

公开(公告)日：2013-01-22

申请号：US12692053

申请日：2010-01-22

申请人： Alexander Granzer ,  Razvan Lazar ,  Wolfgang Renz

发明人： Alexander Granzer ,  Razvan Lazar ,  Wolfgang Renz

IPC分类号： G01V3/00

CPC分类号： G01R33/34007 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/3657 ,  H05K3/0052 ,  H05K3/303 ,  H05K2201/049 ,  H05K2201/0909 ,  H05K2201/09181 ,  Y02P70/613 ,  Y10T29/49117

摘要： Efficient mounting of a module to a whole-body coil of a magnetic resonance apparatus is enabled by a circuit board with conductive contact regions located at least in the area of an edge of the circuit board, with which contact regions contacts of an electronic module for a magnetic resonance apparatus are connected in a conductive manner. The contact regions of the circuit board are configured for electrical contact with the whole-body coil.

摘要翻译： 通过具有至少位于电路板的边缘区域中的导电接触区域的电路板来实现将模块有效地安装到磁共振设备的全身线圈，通过该电路板与电子模块的接触区域接触， 以导电方式连接磁共振装置。 电路板的接触区域被配置为与全身线圈电接触。

公开(公告)号：US20120086451A1

公开(公告)日：2012-04-12

申请号：US13253066

申请日：2011-10-05

申请人： Ludwig Eberler ,  Razvan Lazar ,  Jürgen Nistler

发明人： Ludwig Eberler ,  Razvan Lazar ,  Jürgen Nistler

IPC分类号： G01R33/34

CPC分类号： G01R33/3657 ,  G01R33/34076 ,  G01R33/481 ,  G01R33/56518

摘要： The present embodiments include a magnetic resonance antenna having parallel-running longitudinal antenna rods arranged in a birdcage structure and antenna ferrules connecting the parallel-running longitudinal antenna rods at ends of the parallel-running longitudinal antenna rods in radio frequency terms. The magnetic resonance antenna includes a plurality of radio-frequency switching elements configured to interrupt at least a part of the parallel-running longitudinal antenna rods to detune a natural resonance frequency with respect to an operating magnetic resonance frequency in radio frequency terms. At least some radio-frequency switching elements of the plurality of radio-frequency switching elements are arranged at end sections of the parallel-running longitudinal antenna rods.

摘要翻译： 本实施例包括具有布置在鸟笼结构中的平行行进的纵向天线杆的磁共振天线和以平行延伸的纵向天线杆的端部在平行延伸的纵向天线杆的端部处以射频方式连接的天线套圈。 磁共振天线包括多个射频开关元件，其被配置为中断至少一部分并行运行的纵向天线杆，以使其相对于工作磁共振频率在射频期间失谐。 多个射频开关元件中的至少一些射频开关元件布置在并行运行的纵向天线杆的端部。

公开(公告)号：US08073527B2

公开(公告)日：2011-12-06

申请号：US11905250

申请日：2007-09-28

申请人： Ludwig Eberler ,  Razvan Lazar ,  Jürgen Nistler ,  Wolfgang Renz ,  Norbert Rietsch

发明人： Ludwig Eberler ,  Razvan Lazar ,  Jürgen Nistler ,  Wolfgang Renz ,  Norbert Rietsch

IPC分类号： A61B5/05

CPC分类号： G01R33/3415 ,  G01R33/481

摘要： An RF antenna arrangement of a combined MR/PET system is disclosed. In at least one embodiment, the RF antenna arrangement includes a first part installed in the examination tunnel in a fashion fixed to the system such that it is arranged underneath the couch board when the latter is introduced, and a second part, which can be placed onto the couch board and be introduced into and withdrawn from the examination tunnel together with the couch board. In at least one embodiment, the second part is of dimensionally stable design and has a clear cross section that is adapted to the object to be examined. Consequently, the time outlay for applying the RF antenna is reduced, and the fixed position of the RF antenna enables a correction of the attenuation of gamma rays. Furthermore, a number of second parts having various diameters can be provided.

摘要翻译： 公开了一种组合MR / PET系统的RF天线装置。 在至少一个实施例中，RF天线布置包括以固定到系统的方式安装在检查隧道中的第一部分，使得它被布置在沙发板的下方，当其被引入时，第二部分可以被放置 进入沙发板，并与沙发板一起引入和从检查隧道中取出。 在至少一个实施例中，第二部分是尺寸稳定的设计，并且具有适于被检查物体的清晰的横截面。 因此，减少了施加RF天线的时间费用，并且RF天线的固定位置能够校正伽马射线的衰减。 此外，可以提供多个具有各种直径的第二部分。

公开(公告)号：US08064981B2

公开(公告)日：2011-11-22

申请号：US11984479

申请日：2007-11-19

申请人： Ludwig Eberler ,  Razvan Lazar ,  Jürgen Nistler ,  Wolfgang Renz ,  Norbert Rietsch

发明人： Ludwig Eberler ,  Razvan Lazar ,  Jürgen Nistler ,  Wolfgang Renz ,  Norbert Rietsch

IPC分类号： A61B5/05

CPC分类号： G01R33/28 ,  A61B5/0035 ,  A61B5/055 ,  A61B6/037 ,  G01R33/481 ,  G01T1/1603

摘要： A device for superposed magnetic resonance tomography and positron emission tomography imaging is disclosed. In at least one embodiment, the device includes a magnetic resonance tomography magnet, which defines a longitudinal axis; a magnetic resonance tomography gradient coil, arranged radially within the magnetic resonance tomography magnet; a magnetic resonance tomography RF coil, arranged radially within the magnetic resonance tomography gradient coil; and a multiplicity of positron emission tomography detection units, arranged in pairs lying opposite to one another about the longitudinal axis. In at least one embodiment, the many positron emission tomography detection units are arranged radially within the magnetic resonance tomography gradient coil and are arranged along the longitudinal axis next to the magnetic resonance tomography RF coil.

摘要翻译： 公开了用于叠加磁共振断层扫描和正电子发射断层摄影成像的装置。 在至少一个实施例中，该装置包括限定纵轴的磁共振断层摄影磁体; 磁共振断层摄影梯度线圈，位于磁共振断层摄影磁体内; 磁共振断层摄影RF线圈，径向设置在磁共振断层扫描梯度线圈内; 以及多个正电子发射断层摄影检测单元，成对地布置成围绕纵向轴线彼此相对。 在至少一个实施例中，许多正电子发射断层摄影检测单元径向布置在磁共振断层扫描梯度线圈内，并且沿着纵向轴线布置在磁共振断层摄影RF线圈旁边。

公开(公告)号：US07990146B2

公开(公告)日：2011-08-02

申请号：US12446656

申请日：2008-04-02

申请人： Razvan Lazar ,  Wolfgang Renz

发明人： Razvan Lazar ,  Wolfgang Renz

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/34076 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/422

摘要： A transmission antenna for magnetic resonance applications has a birdcage-like structure that includes antenna rods proceeding between first and second terminating elements respectively located at opposite ends of the antenna rods. A detuning circuit is located at the second terminating element. Either the second terminating element is formed as a completely continuous short circuit ring and the detuning circuit is arranged between the ends of the antenna rods and the second terminating element, or the second terminating element has a number of ferrule segments, between which the detuning circuit is arranged. The second terminating element has a larger cross-section than a the first terminating element.

摘要翻译： 用于磁共振应用的发射天线具有鸟笼状结构，其包括分别位于天线杆的相对端的第一和第二终端元件之间的天线杆。 失谐电路位于第二端接元件。 第二端接元件形成为完全连续的短路环，并且失谐电路被布置在天线杆和第二端接元件的端部之间，或者第二端接元件具有多个套圈段，在其之间，失谐电路 被安排。 第二端接元件具有比第一端接元件更大的横截面。

公开(公告)号：US07728590B2

公开(公告)日：2010-06-01

申请号：US11902584

申请日：2007-09-24

申请人： Ludwig Eberler ,  Razvan Lazar ,  Jürgen Nistler ,  Wolfgang Renz ,  Norbert Rietsch

发明人： Ludwig Eberler ,  Razvan Lazar ,  Jürgen Nistler ,  Wolfgang Renz ,  Norbert Rietsch

IPC分类号： G01V3/00

CPC分类号： G01R33/28 ,  A61B5/0035 ,  A61B5/055 ,  G01R33/481 ,  G01T1/1603

摘要： A detection unit is disclosed for arrangement in the main magnet of an MR device, which has both an RF transceiver system and a PET detector. In at least one embodiment the RF transceiver system is divided into two parts and the two parts are arranged upstream and downstream of the PET detector in the longitudinal direction of the patient tunnel. The RF transceiver system and PET detector are applied to the same image volume. In at least one other embodiment, an MR device is equipped with the detection unit, and in at least one other embodiment, a method operates the detection unit.

摘要翻译： 公开了用于布置在MR设备的主磁体中的检测单元，其具有RF收发器系统和PET检测器。 在至少一个实施例中，RF收发器系统被分成两部分，并且两个部分被布置在患者隧道的纵向上的PET检测器的上游和下游。 RF收发器系统和PET检测器应用于相同的图像体积。 在至少另一个实施例中，MR装置配备有检测单元，并且在至少一个其它实施例中，一种方法操作检测单元。