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：US09696394B2

公开(公告)日：2017-07-04

申请号：US13569034

申请日：2012-08-07

申请人： Matthias Gebhardt ,  Josef Pfeuffer ,  Thorsten Speckner

发明人： Matthias Gebhardt ,  Josef Pfeuffer ,  Thorsten Speckner

IPC分类号： G01R33/36

CPC分类号： G01R33/3607

摘要： A controller of a magnetic resonance system outputs a low frequency base signal to a conversion device. While outputting the base signal to the conversion device, the controller outputs an oscillator control signal to an oscillator. The oscillator outputs a frequency signal corresponding to the oscillator control signal to the conversion device. The conversion device converts the frequency signal into a high frequency transmit pulse with the aid of the base signal and outputs the transmit pulse to a magnetic resonance transmit antenna. The magnetic resonance transmit antenna applies a high frequency field corresponding to a transmit pulse to an examination volume of the magnetic resonance system. The controller varies the oscillator control signal output to the oscillator while outputting the base signal to the modulator. The transmit pulse) has a larger bandwidth than the base signal.

公开(公告)号：US20130038329A1

公开(公告)日：2013-02-14

申请号：US13569034

申请日：2012-08-07

申请人： Matthias Gebhardt ,  Josef Pfeuffer ,  Thorsten Speckner

发明人： Matthias Gebhardt ,  Josef Pfeuffer ,  Thorsten Speckner

IPC分类号： G01R33/32

CPC分类号： G01R33/3607

摘要： A controller of a magnetic resonance system outputs a low frequency base signal to a conversion device. While outputting the base signal to the conversion device, the controller outputs an oscillator control signal to an oscillator. The oscillator outputs a frequency signal corresponding to the oscillator control signal to the conversion device. The conversion device converts the frequency signal into a high frequency transmit pulse with the aid of the base signal and outputs the transmit pulse to a magnetic resonance transmit antenna. The magnetic resonance transmit antenna applies a high frequency field corresponding to a transmit pulse to an examination volume of the magnetic resonance system. The controller varies the oscillator control signal output to the oscillator while outputting the base signal to the modulator. The transmit pulse) has a larger bandwidth than the base signal.

摘要翻译： 磁共振系统的控制器向转换装置输出低频基准信号。 在将基本信号输出到转换装置的同时，控制器向振荡器输出振荡器控制信号。 振荡器将与振荡器控制信号对应的频率信号输出到转换装置。 转换装置借助于基本信号将频率信号转换成高频发射脉冲，并将发射脉冲输出到磁共振发射天线。 磁共振发射天线将对应于发射脉冲的高频场施加到磁共振系统的检查体积。 控制器将输出到振荡器的振荡器控制信号改变，同时将基本信号输出到调制器。 发送脉冲）具有比基本信号更大的带宽。

公开(公告)号：US20170205483A1

公开(公告)日：2017-07-20

申请号：US15407141

申请日：2017-01-16

申请人： Thorsten Feiweier ,  Andreas Greiser ,  Uvo Hölscher ,  Thorsten Speckner ,  David Grodzki ,  Mathias Nittka ,  Daniel Nico Splitthoff

发明人： Thorsten Feiweier ,  Andreas Greiser ,  Uvo Hölscher ,  Thorsten Speckner ,  David Grodzki ,  Mathias Nittka ,  Daniel Nico Splitthoff

IPC分类号： G01R33/54 ,  G01R33/28

摘要： A method for setting a MRI sequence, a magnetic resonance device, and a computer program product are provided. The method includes providing, by a limitation unit, at least one limitation; providing, by a parameter provision unit, a plurality of parameters of the sequence, wherein at least one parameter of the plurality of parameters is assigned to a default parameter value; selecting, by a selection unit, a parameter of the plurality of parameters; determining, by a simulation unit, at least one sequential pattern based on at least one default parameter value of the default parameter values; determining, by an analysis unit, a permissible range of parameter values of the selected parameter based on at least one sequential pattern and the at least one limitation; and establishing, by an establishment unit, a new parameter value of the selected parameter within the permissible range of the parameter values.

公开(公告)号：US09194926B2

公开(公告)日：2015-11-24

申请号：US13769315

申请日：2013-02-16

申请人： Peter Dietz ,  Georg Pirkl ,  Thorsten Speckner

发明人： Peter Dietz ,  Georg Pirkl ,  Thorsten Speckner

IPC分类号： G01R33/54 ,  G01R33/385

CPC分类号： G01R33/54 ,  G01R33/3854

摘要： A method for operating a coil, through which a varying current flows, is provided. Mechanical resonance responses of the coil are recorded and are modeled by an electrical resonant circuit model. A check is made as to whether a varying current that is to be sent through the coil evokes a resonant response in the electrical resonant circuit model. The current flow through the coil is blocked if the resonant response exceeds a predefined limit value.

摘要翻译： 提供了用于操作流过变流的线圈的方法。 记录线圈的机械共振响应，并通过电谐振电路模型建模。 检查通过线圈发送的变化的电流是否在电谐振电路模型中引起谐振响应。 如果谐振响应超过预定极限值，则流过线圈的电流将被阻塞。

公开(公告)号：US20130320977A1

公开(公告)日：2013-12-05

申请号：US13906649

申请日：2013-05-31

申请人： Michael Koehler ,  Thorsten Speckner

发明人： Michael Koehler ,  Thorsten Speckner

IPC分类号： G01R33/32 ,  G01R33/44

CPC分类号： G01R33/32 ,  G01R33/246 ,  G01R33/44

摘要： In a magnetic resonance method and apparatus to determine a subject-specific B1 distribution of an examination subject in a measurement volume in the magnetic resonance apparatus, a first measurement data set of the examination subject is acquired using a first pulse sequence, a second measurement data set of the examination subject is acquired using a second pulse sequence, and a third measurement data set of the examination subject is acquired using a third pulse sequence. A first phase is determined from the first measurement data set, a second phase from the second measurement data set and a third phase from the third measurement data set. A relevant phase shift is calculated from the first phase, the second phase and the third phase, and the B1 distribution are determined from the calculated relevant phase shift.

摘要翻译： 在用于确定磁共振装置的测量体积中的检查对象的受试者特异性B1分布的磁共振方法和装置中，使用第一脉冲序列，第二测量数据获取检查对象的第一测量数据集 使用第二脉冲序列获取检查对象的集合，并且使用第三脉冲序列获取检查对象的第三测量数据集。 从第一测量数据集，第二测量数据集的第二阶段和第三测量数据集的第三阶段确定第一阶段。 从第一阶段，第二阶段和第三阶段计算相关的相移，并且从计算的相关相移确定B1分布。

公开(公告)号：US20130082705A1

公开(公告)日：2013-04-04

申请号：US13630258

申请日：2012-09-28

申请人： Wilfried Landschuetz ,  Thorsten Speckner

发明人： Wilfried Landschuetz ,  Thorsten Speckner

IPC分类号： G01R33/54 ,  G01R33/341

CPC分类号： G01R33/565 ,  A61B5/055 ,  G01R33/5617

摘要： A method for time synchronization of various components of a magnetic resonance system includes generating a series of amplitude-modulated radio-frequency pulses and associated gradient fields to deflect the magnetization of a slice detecting at least two spin signals, determining a phase difference between two of the spin signals, processing the phase difference in order to determine at least one time shift between two of the following variables that are generated by different components of the magnetic resonance system, an envelope of the amplitude-modulated radio-frequency pulses, a radio-frequency portion of the amplitude-modulated radio-frequency pulses, and one or more gradient fields, and synchronizing the associated components of the magnetic resonance system depending on the at least one time shift.

摘要翻译： 用于磁共振系统的各种部件的时间同步的方法包括产生一系列幅度调制的射频脉冲和相关联的梯度场以偏转检测至少两个自旋信号的切片的磁化，确定两个之间的相位差 自旋信号，处理相位差以便确定由磁共振系统的不同部件产生的以下两个变量之间的至少一个时移，调幅射频脉冲的包络， 幅度调制的射频脉冲的频率部分和一个或多个梯度场，并且根据至少一个时移来同步磁共振系统的相关分量。

公开(公告)号：US20110187367A1

公开(公告)日：2011-08-04

申请号：US13020302

申请日：2011-02-03

申请人： Thorsten Feiweier ,  Stefan Huwer ,  Tony Hyun Kim ,  David Andrew Porter ,  Thorsten Speckner

发明人： Thorsten Feiweier ,  Stefan Huwer ,  Tony Hyun Kim ,  David Andrew Porter ,  Thorsten Speckner

IPC分类号： G01R33/44

CPC分类号： G01R33/44

摘要： In a method and magnetic resonance apparatus to reduce distortions in magnetic resonance diffusion imaging, a magnetic resonance data acquisition system is operated to acquire magnetic resonance data in a first measurement with a first diffusion weighting, and to acquire magnetic resonance data in a second measurement with a second, different diffusion weighting. A non-linear, system-specific distortion-correcting function is determined on the basis of system-specific information that is specific to said magnetic resonance data acquisition system. Correction parameters are calculated to correct distortions in subsequently-acquired diffusion-weighted magnetic resonance images, based on the data acquired in the first and second measurements with the system-specific distortion-correcting function applied thereto. The subsequently-acquired diffusion-weighted magnetic resonance images are corrected using the correction parameters to at least reduce distortions therein.

摘要翻译： 在减小磁共振扩散成像中的失真的方法和磁共振装置中，磁共振数据采集系统被操作以在具有第一扩散加权的第一测量中采集磁共振数据，并且在第二测量中采集磁共振数据， 第二个不同的扩散加权。 基于特定于所述磁共振数据采集系统的系统特定信息来确定非线性系统特定的失真校正功能。 基于在第一和第二测量中采集的数据与应用于其的系统特定的失真校正功能，计算校正参数以校正随后获取的扩散加权磁共振图像中的失真。 使用校正参数来校正后续获取的扩散加权磁共振图像，以至少减少其中的失真。

公开(公告)号：US20090146657A1

公开(公告)日：2009-06-11

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： G01R33/565 ,  G06K9/40

CPC分类号： G01R33/56518

摘要： In one embodiment of the present invention, a method for processing a 2D or 3D reconstruction image is disclosed which is recorded by a magnetic resonance device, including a gradient coil that generates a gradient field, and is distortion—corrected with regard to a given non-linearity—leading to an image distortion—of the gradient field using an algorithm that processes the measurement signals at different measurement points lying in the imaging volume, which algorithm, with respect to each signal processed by it, processes the first input value describing the real gradient field given at the real measurement point of the signal, in which method, for inverse transformation of the distortion-corrected reconstruction image into a distortion-uncorrected reconstruction image, use is made of the first algorithm or a second algorithm corresponding to the first algorithm, which, with respect to each signal processed by it, is given as second input value such a value which describes a fictitious gradient field at the respective distorted measurement point at which the processed signal appears, which is increased or decreased by the non-linear field component of the real gradient field compared with the linear ideal gradient field.

摘要翻译： 在本发明的一个实施例中，公开了一种用于处理2D或3D重建图像的方法，其由磁共振装置记录，所述磁共振装置包括产生梯度场的梯度线圈，并且对于给定非对称 - 使用处理在成像体积中的不同测量点处的测量信号的算法，导致梯度场的图像失真，该算法相对于由其处理的每个信号处理描述第一输入值的第一输入值 在该信号的实际测量点处给出的实际梯度场，其中用于将失真校正的重建图像逆变换为失真未校正的重建图像，使用第一算法或对应于第一算法的第二算法 算法，其对于由其处理的每个信号，被给予为第二输入值，例如描述虚构的值 在经过处理的信号出现的相应变形的测量点处，与线性理想梯度场相比，实际梯度场的非线性场分量增加或减小。