公开(公告)号：US20130307539A1

公开(公告)日：2013-11-21

申请号：US13898701

申请日：2013-05-21

申请人： Josef Pfeuffer ,  Thorsten Speckner

发明人： Josef Pfeuffer ,  Thorsten Speckner

IPC分类号： G01R33/58

CPC分类号： G01R33/583 ,  G01R33/4836 ,  G01R33/56509 ,  G01R33/56572 ,  G01R33/5659

摘要： In a method and magnetic resonance apparatus to continuously correct phase errors in a magnetic resonance measurement sequence in which multiple sequentially radiated, multidimensional, spatially-selective radio-frequency excitation pulses are used, multiple calibration gradient echoes are acquired in a calibration acquisition sequence and a correction value for a phase response and a correction value for a phase difference are calculated from the multiple calibration gradient echoes. Furthermore, an additional radio-frequency excitation pulse is radiated takes into account the correction values.

摘要翻译： 在使用多个顺序辐射，多维，空间选择性射频激励脉冲的磁共振测量序列中连续校正相位误差的方法和磁共振装置中，在校准获取序列中获取多个校准梯度回波， 从多个校准梯度回波计算相位响应的校正值和相位差的校正值。 此外，辐射附加的射频激励脉冲考虑校正值。

公开(公告)号：US20130307538A1

公开(公告)日：2013-11-21

申请号：US13898667

申请日：2013-05-21

申请人： Josef Pfeuffer ,  Thorsten Speckner

发明人： Josef Pfeuffer ,  Thorsten Speckner

IPC分类号： G01R33/58

CPC分类号： G01R33/583 ,  G01R33/4836 ,  G01R33/56509 ,  G01R33/56572 ,  G01R33/5659

摘要： In a method and magnetic resonance system to correct phase errors in multidimensional, spatially selective radio-frequency excitation pulses in a pulse sequence used to operate the system to acquire magnetic resonance data, a multidimensional, spatially selective radio-frequency excitation pulse is radiated and multiple calibration gradient echoes are acquired. A phase correction and a time correction of the multidimensional, spatially selective radio-frequency excitation pulse is then calculated.

摘要翻译： 在用于操作系统以获取磁共振数据的脉冲序列中的多维空间选择性射频激励脉冲中校正相位误差的方法和磁共振系统中，多维空间选择性射频激励脉冲被辐射并且多个 获得校准梯度回波。 然后计算多维空间选择性射频激励脉冲的相位校正和时间校正。

公开(公告)号：US20130221965A1

公开(公告)日：2013-08-29

申请号：US13781199

申请日：2013-02-28

申请人： Jürgen Nistler ,  David Andrew Porter ,  Thorsten Speckner ,  Christian Wünsch

发明人： Jürgen Nistler ,  David Andrew Porter ,  Thorsten Speckner ,  Christian Wünsch

IPC分类号： G01R33/58

CPC分类号： G01R33/586 ,  G01R33/36 ,  G01R33/5659

摘要： A B1 magnetic field may be regulated during a magnetic resonance tomography (MRT) imaging sequence.

摘要翻译： 可以在磁共振断层摄影（MRT）成像序列期间调节B1磁场。

公开(公告)号：US07772843B2

公开(公告)日：2010-08-10

申请号：US11989243

申请日：2006-07-13

申请人： Franz Hebrank ,  Thorsten Speckner ,  Axel vom Endt

发明人： Franz Hebrank ,  Thorsten Speckner ,  Axel vom Endt

IPC分类号： G01V3/00

CPC分类号： G01R33/56518

摘要： In one embodiment a method for processing a reconstruction image is disclosed. The method includes recording the reconstruction image by a magnetic resonance device having a gradient coil to generate a gradient field. The method further includes distortion-correcting the reconstruction image. The method further includes back-transforming the distortion-corrected reconstruction image, by an image processing device, into a distortion-uncorrected reconstruction image, the back-transforming uses a first algorithm or a second algorithm including a second input value associated with the measurement signal, the second input value being a fictitious gradient field value associated with a distorted measuring point at which the measurement signal is processed, and the second input value is raised or lowered by a nonlinear field component of the real gradient field compared with a linear ideal gradient field.

摘要翻译： 在一个实施例中，公开了一种用于处理重建图像的方法。 该方法包括通过具有梯度线圈的磁共振装置记录重建图像以产生梯度场。 该方法还包括对重建图像进行失真校正。 该方法还包括将失真校正的重建图像由图像处理装置反向变换为失真未校正的重建图像，反向变换使用包括与测量信号相关联的第二输入值的第一算法或第二算法 ，第二输入值是与处理测量信号的失真测量点相关联的虚拟梯度场值，并且第二输入值与实际梯度场的非线性场分量相比，与线性理想梯度相比升高或降低 领域。

公开(公告)号：US07663368B2

公开(公告)日：2010-02-16

申请号：US12018333

申请日：2008-01-23

申请人： Razvan Lazar ,  Wolfgang Renz ,  Thorsten Speckner

发明人： Razvan Lazar ,  Wolfgang Renz ,  Thorsten Speckner

IPC分类号： G01V3/00

CPC分类号： G01R33/341 ,  G01R33/3415 ,  G01R33/5659

摘要： An arrangement for radiation of a radio-frequency field into an examination subject has a local coil unit with a housing. An insulating dielectric material is embodied at least at one part of the housing in order to passively compensate an inhomogeneity of the B1 field that occurs in the examination subject. An adjustment arrangement allows for fixed but detachable provision of the insulating dielectric material at the housing part.

摘要翻译： 用于将射频场辐射到检查对象中的布置具有带壳体的局部线圈单元。 绝缘介电材料至少体现在壳体的一部分上，以便被动地补偿在检查对象中发生的B1场的不均匀性。 调节装置允许绝缘电介质材料在壳体部分固定但可拆卸地设置。

公开(公告)号：US20090192382A1

公开(公告)日：2009-07-30

申请号：US12358378

申请日：2009-01-23

申请人： Juergen Nistler ,  Wolfgang Renz ,  Thorsten Speckner

发明人： Juergen Nistler ,  Wolfgang Renz ,  Thorsten Speckner

IPC分类号： A61B5/055 ,  G01V3/00 ,  H01P11/00

CPC分类号： G01R33/34046 ,  G01R33/3415 ,  G01R33/3678 ,  G01R33/5659 ,  Y10T29/49016

摘要： A magnetic resonance system obtaining magnetic resonance exposures of an examination subject, has an examination tunnel, a whole-body antenna with two connection terminals. The whole-body antenna cylindrically extends around the examination tunnel along a longitudinal axis. The system has a radio-frequency supply device in order to respectively supply the whole-body antenna with radio-frequency signals for emission of a radio-frequency field in the examination tunnel. The radio-frequency supply device has a radio-frequency generator for generation of a radio-frequency signal, a signal splitter that divides a radio-frequency signal coming from the radio-frequency generator into two partial signals that are phase-shifted by 90° relative to one another. Two radio-frequency feed lines are connected with the two connection terminals of the whole-body antenna. Via these radio-frequency feed lines, the two partial signals are fed into the whole-body antenna. The whole-body antenna has an intrinsic transmission characteristic such that a radio-frequency field is emitted that is elliptically polarized in a defined manner in a plane lying perpendicular to the longitudinal axis (at least in the unloaded state of the examination tunnel).

摘要翻译： 获得检查对象的磁共振曝光的磁共振系统具有检查隧道，具有两个连接端子的全身天线。 全身天线沿着纵向轴线围绕检查隧道圆周延伸。 该系统具有射频供给装置，以分别向全身天线提供用于在检查隧道中发射射频场的射频信号。 射频供给装置具有用于产生射频信号的射频发生器，将来自射频发生器的射频信号分割为相移90°的两个部分信号的信号分离器 相对于彼此。 两根射频馈线与全身天线的两个连接端子连接。 通过这些射频馈线，两个部分信号被馈送到全身天线。 全身天线具有固有的传输特性，使得在垂直于纵向轴线的平面中（至少在检查隧道的无负载状态）中以限定的方式发射出被椭圆偏振的射频场。

公开(公告)号：US07432713B2

公开(公告)日：2008-10-07

申请号：US11756780

申请日：2007-06-01

申请人： Yvonne Candidus ,  Thorsten Feiweier ,  Jürgen Huber ,  Lothar Schön ,  Thorsten Speckner

发明人： Yvonne Candidus ,  Thorsten Feiweier ,  Jürgen Huber ,  Lothar Schön ,  Thorsten Speckner

IPC分类号： G01V3/00

CPC分类号： G01R33/28 ,  G01R33/5659

摘要： A dielectric element for positioning on an examination subject for locally influencing the B1 field distribution during magnetic resonance data acquisition contains a relaxation agent bound to mutually separated particles. The relaxation agent incorporates a paramagnetic substance. In a corresponding method for acquiring magnetic resonance data from an examination subject, such a dielectric element is positioned on the examination subject for locally influencing the B1 field distribution, by homogenizing the B1 field of a magnetic resonance apparatus.

摘要翻译： 用于定位在检查对象上用于在磁共振数据采集期间局部影响B1场分布的电介质元件包含与相互分离的颗粒结合的松弛剂。 松弛剂包含顺磁性物质。 在用于从检查对象获取磁共振数据的相应方法中，这样的电介质元件位于检查对象上，用于局部影响B 1场分布，通过使B＆lt; 1＆ 磁共振装置。

公开(公告)号：US10145918B2

公开(公告)日：2018-12-04

申请号：US13784797

申请日：2013-03-04

申请人： Nikolaus Demharter ,  Klaus Huber ,  Claus Seisenberger ,  Thorsten Speckner ,  Markus Vester ,  Christian Wünsch

发明人： Nikolaus Demharter ,  Klaus Huber ,  Claus Seisenberger ,  Thorsten Speckner ,  Markus Vester ,  Christian Wünsch

IPC分类号： G01R33/54 ,  G01R33/36

摘要： A method for emitting a sequence of high frequency pulses that may have different envelopes in a magnetic resonance tomography system is provided. A digital instruction signal that specifies the envelope for the high frequency pulses that are to be emitted is received. A digital control signal is transmitted to a high frequency unit for generating high frequency pulses, depending on the instruction signal. A test signal that allows notification of a current overload situation is received. The current control signal is reduced if the test signal indicates an overload situation.

公开(公告)号：US09651642B2

公开(公告)日：2017-05-16

申请号：US14169620

申请日：2014-01-31

申请人： Michael Koehler ,  Thorsten Speckner

发明人： Michael Koehler ,  Thorsten Speckner

IPC分类号： G01R33/54 ,  G01R33/24

CPC分类号： G01R33/54 ,  G01R33/246

摘要： In a method and magnetic resonance (MR) system to acquire MR data within a volume segment, the MR data are repeatedly acquired with a sequence that which includes the following steps. A first resonant RF pulse is radiated and a second resonant RF pulse is radiated. A dephasing first gradient is applied after the first resonant RF pulse and before the second resonant RF pulse. A third resonant RF pulse is radiated after the second resonant RF pulse. A second gradient is applied after the third RF pulse in order to refocus a stimulated echo of a magnetization component prepared by the first gradient. MR data are read out, and a fourth resonant RF pulse is radiated after the readout of the MR data, to reduce the longitudinal magnetization.

公开(公告)号：US09625546B2

公开(公告)日：2017-04-18

申请号：US14169556

申请日：2014-01-31

申请人： Michael Koehler ,  Thorsten Speckner

发明人： Michael Koehler ,  Thorsten Speckner

IPC分类号： G01R33/44 ,  G01R33/24 ,  G01R33/54 ,  A61B5/055

CPC分类号： G01R33/443 ,  A61B5/055 ,  G01R33/246 ,  G01R33/54

摘要： In a method to acquire magnetic resonance (MR) data within a volume segment with a magnetic resonance system, the MR data are repeatedly acquired with a sequence that includes radiating a first resonant RF pulse, radiating a second resonant RF pulse, applying a dephasing first gradient after the first resonant RF pulse and before the second resonant RF pulse, radiating a third resonant RF pulse after the second resonant RF pulse, applying a second gradient after the third RF pulse in order to refocus a stimulated echo of a magnetization component prepared by the first gradient, and read out MR data. At least one of the first gradient and/or the second gradient is/are different in a respective repetition of the sequence and an additional repetition of the sequence that directly follows the respective repetition.