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：US08274283B2

公开(公告)日：2012-09-25

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： G01V3/00

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：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。

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：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。

公开(公告)号：US07492156B2

公开(公告)日：2009-02-17

申请号：US11095159

申请日：2005-03-31

申请人： Yvonne Candidus ,  Thorsten Feiweier ,  Wilhelm Horger ,  Jürgen Huber ,  Razvan Lazar ,  Melanie Schmitt ,  Lothar Schön

发明人： Yvonne Candidus ,  Thorsten Feiweier ,  Wilhelm Horger ,  Jürgen Huber ,  Razvan Lazar ,  Melanie Schmitt ,  Lothar Schön

IPC分类号： G01V3/00 ,  A61B5/00

CPC分类号： G01R33/28 ,  G01R33/34 ,  G01R33/5659 ,  Y10T29/49

摘要： A dielectric element is formed of a dielectric material exhibiting a magnetic resonance relaxation time, with a relaxation agent incorporated in the dielectric material that reduces the relaxation time of the dielectric material. The dielectric element is adapted for placement on a subject while magnetic resonance data are acquired from the subject, and locally influences the B1 field distribution in the subject during the acquisition of magnetic resonance data.

公开(公告)号：US20090041318A1

公开(公告)日：2009-02-12

申请号：US12219613

申请日：2008-07-24

申请人： Thorsten Feiweier ,  Ralf Ladebeck ,  Diana Martin ,  Hartwig Newiger ,  Josef Pfeuffer ,  Michael Szimtenings ,  Harald Werthner

发明人： Thorsten Feiweier ,  Ralf Ladebeck ,  Diana Martin ,  Hartwig Newiger ,  Josef Pfeuffer ,  Michael Szimtenings ,  Harald Werthner

IPC分类号： G01R33/56 ,  G01R33/54

CPC分类号： A61B6/032 ,  A61B5/11 ,  A61B5/7285 ,  A61B6/037 ,  A61B6/541 ,  A61B8/00 ,  A61B8/4416 ,  G06F19/00

摘要： A method is disclosed for recording measured data of a patient while taking account of movement operations by way of a medical device that is designed both for recording movement-related measured data, in particular measured data of high temporal resolution and/or measured data that can be interpolated with regard to movement operations, with the aid of an imaging method and/or by means of at least one sensor element, and also for recording nuclear medicine measured data, in particular of lower temporal resolution. In at least one embodiment, the method includes recording nuclear medicine measured data with the aid of the medical device; simultaneously recording movement-related measured data with the aid of the medical device; determining at least one item of movement information relating to at least one movement operation of the patient and/or in the body of the patient by evaluating at least a portion of the recorded measured data of high temporal resolution on the part of a computing device of the medical device; and adapting at least one item of attenuation correction information available for the computing device and serving for reconstructing the nuclear medicine measured data, doing so as a function of the at least one determined item of movement information.

摘要翻译： 公开了一种用于记录患者的测量数据的方法，同时考虑到通过设计用于记录运动相关测量数据的医疗设备，特别是高时间分辨率的测量数据和/或可测量数据的测量数据， 借助于成像方法和/或通过至少一个传感器元件，以及用于记录核医学测量数据，特别是用于记录较低时间分辨率的内插关于移动操作。 在至少一个实施例中，该方法包括借助医疗装置记录核医学测量数据; 借助医疗设备同时记录运动相关测量数据; 通过在计算设备的一部分上评估所记录的高时间分辨率测量数据的至少一部分来确定与患者的至少一个移动操作和/或患者身体有关的至少一个移动信息项 医疗器械; 以及修改可用于所述计算设备的至少一项衰减校正信息，并且用于重构所述核医学测量数据，作为所述至少一个确定的运动信息项的函数。