公开(公告)号：US20130127462A1

公开(公告)日：2013-05-23

申请号：US13679782

申请日：2012-11-16

申请人： Thorsten Feiweier ,  Thorsten Speckner

发明人： Thorsten Feiweier ,  Thorsten Speckner

IPC分类号： G01R33/48

CPC分类号： G01R33/48 ,  G01R33/3415 ,  G01R33/4835 ,  G01R33/543

摘要： A receiving device for magnetic resonance (MR) image signals of a body is operated in an MR system such that for at least one coil element of the receiving device, a space domain, in which a spatial sensitivity of the coil element satisfies a predetermined criterion, is determined. A center frequency and a bandwidth of the MR image signal radiated by the body in the space domain are determined for the space domain. A receive path disposed downstream of the coil element is parameterized for operation at the determined center frequency and with the determined bandwidth.

摘要翻译： 用于身体的磁共振（MR）图像信号的接收装置在MR系统中操作，使得对于接收装置的至少一个线圈元件，空间域，其中线圈元件的空间灵敏度满足预定标准 ， 决心，决意，决定。 空间域中的身体辐射的MR图像信号的中心频率和带宽被确定。 设置在线圈元件下游的接收路径被参数化以在确定的中心频率和确定的带宽下操作。

公开(公告)号：US20100286802A1

公开(公告)日：2010-11-11

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： G06F17/00

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：US07573266B2

公开(公告)日：2009-08-11

申请号：US11612802

申请日：2006-12-19

申请人： Thorsten Feiweier ,  Peter Heubes ,  Thorsten Speckner

发明人： Thorsten Feiweier ,  Peter Heubes ,  Thorsten Speckner

IPC分类号： G01V3/00

CPC分类号： G01R33/583 ,  G01R33/586

摘要： In a method for adjustment of the field strength of radio-frequency pulses as well as a magnetic resonance measurement system, radio-frequency pulses are emitted by a radio-frequency antenna of a magnetic resonance measurement system in a magnetic resonance measurement. A test volume slice is initially excited by emission of radio-frequency pulses with a defined pulse amplitude by the appertaining radio-frequency antenna and one-dimensional, spatially-resolved characteristic values are determined along an extent direction of the test volume slice. The one-dimensional, spatially-resolved characteristic values respectively represent a local field strength of the B1 field in strips of the test volume slice running perpendicular to the extent direction. An average value of the determined characteristic values is then formed over at least over one determined segment along the extent direction of the test volume slice. A pulse amplitude of the radio-frequency pulses that is to be set for the magnetic resonance measurement to be implemented is determined on the basis of the average value.

摘要翻译： 在用于调整射频脉冲的场强的方法以及磁共振测量系统中，由磁共振测量系统的射频天线在磁共振测量中发射射频脉冲。 最初通过用相应的射频天线发射具有定义的脉冲幅度的射频脉冲来激发测试体积片，并且沿着测试体积片的范围方向确定一维的空间分辨特征值。 一维空间分辨特征值分别表示垂直于范围方向运行的测试体积切片中的B1场的局部场强。 然后，沿着测试体积切片的扩展方向在至少一个确定的段上形成所确定的特征值的平均值。 基于平均值来确定要实现的磁共振测量要设置的射频脉冲的脉冲幅度。

公开(公告)号：US20070279054A1

公开(公告)日：2007-12-06

申请号：US11756780

申请日：2007-06-01

申请人： Yvonne Candidus ,  Thorsten Feiweier ,  Jurgen Huber ,  Lothar Schon ,  Thorsten Speckner

发明人： Yvonne Candidus ,  Thorsten Feiweier ,  Jurgen Huber ,  Lothar Schon ,  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：US20070145975A1

公开(公告)日：2007-06-28

申请号：US11612802

申请日：2006-12-19

申请人： Thorsten Feiweier ,  PETER HEUBES ,  THORSTEN SPECKNER

发明人： Thorsten Feiweier ,  PETER HEUBES ,  THORSTEN SPECKNER

IPC分类号： G01V3/00

CPC分类号： G01R33/583 ,  G01R33/586

摘要： In a method for adjustment of the field strength of radio-frequency pulses as well as a magnetic resonance measurement system, radio-frequency pulses are emitted by a radio-frequency antenna of a magnetic resonance measurement system in a magnetic resonance measurement A test volume slice is initially excited by emission of radio-frequency pulses with a defined pulse amplitude by the appertaining radio-frequency antenna and one-dimensional, spatially-resolved characteristic values are determined along an extent direction of the test volume slice. The one-dimensional, spatially-resolved characteristic values respectively represent a local field strength of the B1 field in strips of the test volume slice running perpendicular to the extent direction. An average value of the determined characteristic values is then formed over at least over one determined segment along the extent direction of the test volume slice. A pulse amplitude of the radio-frequency pulses that is to be set for the magnetic resonance measurement to be implemented is determined on the basis of the average value.

摘要翻译： 在用于调整射频脉冲的场强的方法以及磁共振测量系统中，通过磁共振测量系统的射频天线在磁共振测量A中发射射频脉冲。测试体积切片 最初由具有定位的脉冲幅度的射频脉冲的发射激发，并且沿测试体积切片的范围方向确定一维的空间分辨特征值。 一维空间分辨特征值分别表示垂直于范围方向延伸的测试体积片的条带中的B SUB场的局部场强。 然后，沿着测试体积切片的扩展方向在至少一个确定的段上形成所确定的特征值的平均值。 基于平均值来确定要实现的磁共振测量要设置的射频脉冲的脉冲幅度。

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：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。

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：US20100271021A1

公开(公告)日：2010-10-28

申请号：US12430546

申请日：2009-04-27

申请人： Kecheng Liu ,  YongMing Dai ,  Tiejun Zhao ,  Thorsten Feiweier ,  Jing An

发明人： Kecheng Liu ,  YongMing Dai ,  Tiejun Zhao ,  Thorsten Feiweier ,  Jing An

IPC分类号： G01R33/48 ,  G01R33/44

CPC分类号： G01R33/56341

摘要： An apparatus and method for obtaining diffusion weighted magnetic resonance images (DW-MRI) is described. The properties of the diffusion tensor in tissue are measured by applying a diffusion weighting gradient oriented along a plurality of measurement axes. The value of the magnetic field is increased by using as many of the magnetic gradient coils as are effective in contributing the gradient field strength along the axis being. In regions where the magnetic field gradient is increased, the echo time (TE) may be decreased, increasing the signal-to-noise ratio of the measurements. Alternatively, the number of measurements than are averaged to achieve a particular image quality may be decreased, reducing the patient exposure time.

摘要翻译： 描述了用于获得扩散加权磁共振图像（DW-MRI）的装置和方法。 通过施加沿多个测量轴定向的扩散加权梯度来测量组织中的扩散张量的性质。 通过使用有效地贡献沿轴线的梯度场强度的磁化梯度线圈数来增加磁场的值。 在磁场梯度增加的区域中，可以减小回波时间（TE），增加测量的信噪比。 或者，可以减少平均以获得特定图像质量的测量次数，减少患者暴露时间。

公开(公告)号：US07821266B2

公开(公告)日：2010-10-26

申请号：US12184399

申请日：2008-08-01

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01V3/00

CPC分类号： G01R33/54 ,  G01R33/543 ,  G01R33/546 ,  G01R33/58

摘要： In a method and computerized device for determination of imaging parameters for the acquisition of a magnetic resonance image of an examination subject, initial imaging parameters are established, a calculation is made, based on the initial imaging parameters, of signal intensities for tissue types that occur at least in a portion of the examination subject, and the imaging parameters for the acquisition of the magnetic resonance image under are adapted dependent on the calculated signal intensities.

摘要翻译： 在用于确定用于获取检查对象的磁共振图像的成像参数的方法和计算机化装置中，建立初始成像参数，基于初始成像参数计算出现的组织类型的信号强度 至少在检查对象的一部分中，并且用于获取磁共振图像的成像参数根据计算的信号强度而适应。