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。

公开(公告)号：US10254364B2

公开(公告)日：2019-04-09

申请号：US15230674

申请日：2016-08-08

申请人： David Grodzki ,  Thorsten Speckner

发明人： David Grodzki ,  Thorsten Speckner

IPC分类号： G01V3/00 ,  G01R33/483 ,  G01R33/385 ,  G01R33/54

摘要： A method for optimizing a slice orientation for an examination using a magnetic resonance machine is provided. One or more device limitation of the magnetic resonance machine is provided. The device limitation includes, for at least one of the one or more gradient axes, a maximum gradient strength and/or a maximum gradient slew rate. At least one measurement parameter value of the examination and an original slice orientation are also provided. Rotational-angle information is determined from device limitations, measurement parameter values, and the original slice orientation. The rotational-angle information is used to optimize the original slice orientation, and the magnetic resonance machine captures measurement data on the basis of the optimized slice orientation.

公开(公告)号：US09366739B2

公开(公告)日：2016-06-14

申请号：US13853865

申请日：2013-03-29

申请人： Thorsten Feiweier ,  Thorsten Speckner

发明人： Thorsten Feiweier ,  Thorsten Speckner

IPC分类号： G01V3/00 ,  G01R33/54 ,  G01R33/32 ,  G01R33/561

CPC分类号： G01R33/54 ,  G01R33/32 ,  G01R33/5612

摘要： A method for activating a magnetic resonance system having a transmit antenna arrangement is provided. The transmit antenna arrangement includes a plurality of independent high-frequency transmit channels with a respectively assigned transmit antenna. Each high-frequency transmit channel has a controllable oscillator. The individual high-frequency transmit channels are activated with independent transmit pulses, and a frequency of the controllable oscillators is controlled independently. At least two of the controllable oscillators therefore oscillate in different frequencies.

摘要翻译： 提供一种用于激活具有发射天线装置的磁共振系统的方法。 发射天线布置包括具有分配的发射天线的多个独立的高频发射信道。 每个高频发射信道具有可控振荡器。 单独的高频发射信道由独立的发射脉冲激活，可控振荡器的频率被独立地控制。 因此，至少两个可控振荡器以不同的频率振荡。

公开(公告)号：US20150226820A1

公开(公告)日：2015-08-13

申请号：US14620666

申请日：2015-02-12

申请人： Stephan Biber ,  Jürgen Nistler ,  Thorsten Speckner

发明人： Stephan Biber ,  Jürgen Nistler ,  Thorsten Speckner

IPC分类号： G01R33/483 ,  G01R33/34 ,  G01R33/383 ,  G01R33/44 ,  G01R33/54

CPC分类号： G01R33/4831 ,  G01R33/34046 ,  G01R33/34092 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/3607 ,  G01R33/383 ,  G01R33/443 ,  G01R33/543 ,  G01R33/546 ,  G01R33/5659

摘要： A magnetic resonance imaging system includes an arrangement of magnet systems for generating a homogeneous main magnetic field and additional gradient fields for spatial encoding. At least one transmission coil is used to radiate in an alternating electromagnetic field in order to induce magnetic resonance signals and measure the latter using at least one reception coil. The magnetic resonance imaging system is configured in such that, during an imaging measurement of the magnetic resonance signals for generating the alternating electromagnetic field, at least one fixedly installed whole body coil system and at least one mobile local coil system are operated simultaneously with separately actuated channels.

摘要翻译： 磁共振成像系统包括用于产生均匀主磁场的磁体系统和用于空间编码的附加梯度场的布置。 至少一个传输线圈用于在交变电磁场中辐射，以便诱导磁共振信号，并使用至少一个接收线圈测量后者。 磁共振成像系统被配置为使得在用于产生交变电磁场的磁共振信号的成像测量期间，至少一个固定安装的全身线圈系统和至少一个移动局部线圈系统同时被操作并且被单独致动 频道

公开(公告)号：US08633690B2

公开(公告)日：2014-01-21

申请号：US12777378

申请日：2010-05-11

申请人： Thorsten Feiweier ,  Daniel Fischer ,  Hendrik Jeschke ,  Thorsten Speckner ,  Stephan Stoecker

发明人： Thorsten Feiweier ,  Daniel Fischer ,  Hendrik Jeschke ,  Thorsten Speckner ,  Stephan Stoecker

IPC分类号： G01R33/54 ,  G01R33/546 ,  A61B5/055

CPC分类号： G01R33/54 ,  A61B5/055 ,  G01R33/546

摘要： In an imaging system having a number of subsystems and a control device that controls the subsystems in a coordinated manner to implement a measurement sequence and an operating method therefor, sequence control data that define different functional sub-sequences of the measurement sequence are transmitted to the control device. Different active volumes are associated with the functional sub-sequences. In addition to the sequence control data, active volume position data are provided to the control device that define bearing and extent of the active volumes associated with the different functional sub-sequences. Control signals to implement the measurement sequence for the different subsystems are generated automatically by the control device based on the sequence control data and the active volume position data so that the individual functional sub-sequences are locally optimized at least with regard to a sub-region of their associated active volume.

摘要翻译： 在具有多个子系统和控制装置的成像系统中，以协调的方式控制子系统以实现测量序列及其操作方法，定义测量序列的不同功能子序列的序列控制数据被发送到 控制装置 不同的活动卷与功能子序列相关联。 除了序列控制数据之外，将有效体积位置数据提供给控制装置，其定义与不同功能子序列相关联的活动体的轴承和范围。 用于实现不同子系统的测量序列的控制信号由控制装置基于序列控制数据和有效体积位置数据自动生成，使得至少关于子区域对各个功能子序列进行局部优化 的相关活动量。