公开(公告)号：US20110052031A1

公开(公告)日：2011-03-03

申请号：US12874592

申请日：2010-09-02

申请人： Thorsten Feiweier ,  Stefan Huwer

发明人： Thorsten Feiweier ,  Stefan Huwer

IPC分类号： G06K9/00 ,  G01R33/48

CPC分类号： G01R33/56518 ,  A61B5/055 ,  A61B5/7207 ,  G01R33/56341

摘要： In a method for correction of distortions in image data in a diffusion imaging, the image data are acquired with an imaging MRT measurement for a predetermined diffusion weighting and map a predetermined image segment. A diffusion model for the image segment is determined. Output image data are determined for the image segment such that the output image data are essentially free of distortions caused by diffusion weighting. Reference image data are estimated for the predetermined diffusion weighting for the image segment based on the output image data and the diffusion model. The acquired image data are compared with the reference image data and the acquired image data are corrected based on the comparison.

摘要翻译： 在用于校正扩散成像中的图像数据中的失真的方法中，通过用于预定扩散加权的成像MRT测量获取图像数据并映射预定图像片段。 确定图像段的扩散模型。 为图像片段确定输出图像数据，使得输出图像数据基本上没有由扩散加权引起的失真。 基于输出图像数据和扩散模型，针对图像片段的预定扩散加权来估计参考图像数据。 将获取的图像数据与参考图像数据进行比较，并且基于比较来校正所获取的图像数据。

公开(公告)号：US08548217B2

公开(公告)日：2013-10-01

申请号：US12874592

申请日：2010-09-02

申请人： Thorsten Feiweier ,  Stefan Huwer

发明人： Thorsten Feiweier ,  Stefan Huwer

IPC分类号： G06K9/00

CPC分类号： G01R33/56518 ,  A61B5/055 ,  A61B5/7207 ,  G01R33/56341

摘要： In a method for correction of distortions in image data in a diffusion imaging, the image data are acquired with an imaging MRT measurement for a predetermined diffusion weighting and map a predetermined image segment. A diffusion model for the image segment is determined. Output image data are determined for the image segment such that the output image data are essentially free of distortions caused by diffusion weighting. Reference image data are estimated for the predetermined diffusion weighting for the image segment based on the output image data and the diffusion model. The acquired image data are compared with the reference image data and the acquired image data are corrected based on the comparison.

摘要翻译： 在用于校正扩散成像中的图像数据中的失真的方法中，通过用于预定扩散加权的成像MRT测量获取图像数据并映射预定图像片段。 确定图像段的扩散模型。 为图像片段确定输出图像数据，使得输出图像数据基本上没有由扩散加权引起的失真。 基于输出图像数据和扩散模型，针对图像片段的预定扩散加权来估计参考图像数据。 将获取的图像数据与参考图像数据进行比较，并且基于比较来校正所获取的图像数据。

公开(公告)号：US08508226B2

公开(公告)日：2013-08-13

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： G01V3/00

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：US08283925B2

公开(公告)日：2012-10-09

申请号：US12650757

申请日：2009-12-31

申请人： Karin Auslender ,  Thorsten Feiweier ,  Stefan Huwer

发明人： Karin Auslender ,  Thorsten Feiweier ,  Stefan Huwer

IPC分类号： G01V3/00

CPC分类号： G01R33/56341 ,  A61B5/055 ,  A61B5/7207 ,  G01R33/56518

摘要： In a method and magnetic resonance (MR) system for correction of image distortions that occur in acquisitions of diffusion-weighted MR images of an examination subject a first adjustment measurement with a first diffusion weighting is implemented, a second adjustment measurement with a second diffusion weighting is implemented and correction parameters to de-skew diffusion-weighted MR images are automatically calculated in a computer on the basis of the two adjustment measurements. One of the two adjustment measurements is implemented with a predetermined diffusion weighting in three orthogonal diffusion directions, and correction parameters are determined for the three orthogonal diffusion directions.

摘要翻译： 在用于校正在检查对象的扩散加权MR图像的采集中发生的图像失真的方法和磁共振（MR）系统中，实现具有第一扩散加权的第一调整测量，具有第二扩散加权的第二调整测量 并且基于两个调整测量在计算机中自动计算用于去偏斜扩散加权的MR图像的校正参数。 两个调整测量中的一个在三个正交扩散方向上以预定的扩散加权来实现，并且为三个正交扩散方向确定校正参数。

公开(公告)号：US20100171498A1

公开(公告)日：2010-07-08

申请号：US12650757

申请日：2009-12-31

申请人： Karin Auslender ,  Thorsten Feiweier ,  Stefan Huwer

发明人： Karin Auslender ,  Thorsten Feiweier ,  Stefan Huwer

IPC分类号： G01R33/48 ,  G06K9/00

CPC分类号： G01R33/56341 ,  A61B5/055 ,  A61B5/7207 ,  G01R33/56518

摘要： In a method and magnetic resonance (MR) system for correction of image distortions that occur in acquisitions of diffusion-weighted MR images of an examination subject a first adjustment measurement with a first diffusion weighting is implemented, a second adjustment measurement with a second diffusion weighting is implemented and correction parameters to de-skew diffusion-weighted MR images are automatically calculated in a computer on the basis of the two adjustment measurements. One of the two adjustment measurements is implemented with a predetermined diffusion weighting in three orthogonal diffusion directions, and correction parameters are determined for the three orthogonal diffusion directions.

摘要翻译： 在用于校正在检查对象的扩散加权MR图像的采集中发生的图像失真的方法和磁共振（MR）系统中，实现具有第一扩散加权的第一调整测量，具有第二扩散加权的第二调整测量 并且基于两个调整测量在计算机中自动计算用于去偏斜扩散加权的MR图像的校正参数。 两个调整测量中的一个在三个正交扩散方向上以预定的扩散加权来实现，并且为三个正交扩散方向确定校正参数。

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：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：US08928319B2

公开(公告)日：2015-01-06

申请号：US13157503

申请日：2011-06-10

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01R33/565 ,  G01R33/563

CPC分类号： G01R33/56341 ,  G01R33/56518

摘要： In a magnetic resonance (MR) apparatus and an operating method for the apparatus, image distortions are corrected that occur in exposures of diffusion-weighted MR images of an examination subject.A diffusion-weighted image is acquired using a first acquisition process.Another diffusion-weighted reference image is acquired using a second acquisition process that is different than the first acquisition process.The second acquisition process causes significantly smaller eddy current-dependent image distortions than the first acquisition process given the same b-value.Correction parameters to correct the image distortions of the diffusion-weighted image are determined by comparing the diffusion-weighted image with the reference image in order to determine the correction parameters such that the diffusion-weighted image can be converted into the reference image with the aid of the correction parameters.

摘要翻译： 在磁共振（MR）装置和装置的操作方法中，校正在检查对象的扩散加权的MR图像的曝光中发生的图像失真。 使用第一获取处理获取扩散加权图像。 使用不同于第一获取过程的第二获取过程获取另一扩散加权参考图像。 第二采集过程导致与给定相同b值的第一次采集过程相比，显着较小的涡流依赖图像失真。 通过将扩散加权图像与参考图像进行比较来确定弥补加权图像的图像失真的校正参数，以便确定校正参数，使得可以借助于扩散加权图像将扩散加权图像转换成参考图像 的校正参数。

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。

公开(公告)号：US08436613B2

公开(公告)日：2013-05-07

申请号：US12773121

申请日：2010-05-04

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01V3/00

CPC分类号： G01R33/56341 ,  A61B5/055 ,  A61B5/7207 ,  G01R33/4818 ,  G01R33/5616

摘要： In a method for diffusion-weighted acquisition of MR signals with an acquisition sequence that includes a diffusion module with multiple diffusion coding gradients and a readout module with readout gradients to acquire the MR signals, the acquisition sequence is configured to acquire MR signals that correspond to a predetermined signal coherence path. The method includes the acquisition of MR signals with the acquisition sequence, and the diffusion coding gradients are activated with predetermined gradient moments during the acquisition sequence. The gradient moments of the diffusion coding gradients are set such that MR signals that correspond to other coherence paths than the predetermined coherence path are reduced, wherein the adjustment of the gradient moments to achieve a predetermined reduction ensues on the basis of a threshold.

摘要翻译： 在用包括具有多个扩散编码梯度的扩散模块的采集序列和具有读出梯度的读出模块来获取MR信号的MR信号的扩散加权采集的方法中，获取序列被配置为获取对应于 预定的信号相干路径。 该方法包括利用获取序列获取MR信号，并且在采集序列期间以预定的梯度矩激活扩散编码梯度。 扩散扩散编码梯度的梯度矩被设定为使得与预定的相干路径相对应的其它相干路径的MR信号减小，其中基于阈值进行梯形矩的调整以实现预定的减小。