公开(公告)号：US08954202B2

公开(公告)日：2015-02-10

申请号：US13690043

申请日：2012-11-30

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G05B19/02 ,  A61B6/00 ,  G01R33/54 ,  G06F19/00 ,  A61B5/055 ,  A61B8/00

CPC分类号： G05B19/02 ,  A61B5/055 ,  A61B6/00 ,  A61B6/586 ,  A61B8/00 ,  G01R33/54 ,  G01R33/543 ,  G06F19/00 ,  G16H40/20

摘要： A computer is supplied with information about a measurement sequence to be implemented by a medical imaging system, and determines at least one group of preliminary control sequences for power supply devices of the medical imaging system so that the power control devices are caused to control image-influencing emission devices of the imaging medical system corresponding to the control sequences. Using a model of the image-influencing emission devices and their respective power control devices, and their respective initial load state, the computer determines whether a load state curve for those devices is below a load limit, and emits a final control sequence for those devices that are determined to be below the limit.

摘要翻译： 向计算机提供关于将由医学成像系统实现的测量序列的信息，并且确定医疗成像系统的供电装置的至少一组初步控制序列，使得使得功率控制装置控制图像 - 影响与控制序列对应的成像医疗系统的发射装置。 使用图像影响发射装置及其各自的功率控制装置的模型及其相应的初始负载状态，计算机确定这些装置的负载状态曲线是否低于负载极限，并且发出这些装置的最终控制顺序 这被确定为低于极限。

公开(公告)号：US08854037B2

公开(公告)日：2014-10-07

申请号：US13218435

申请日：2011-08-25

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01V3/00 ,  G01R33/565

CPC分类号： G01R33/56518

摘要： A method for compensating for eddy current fields in magnetic resonance images acquired using a magnetic resonance apparatus is provided. A global component of the eddy current fields corresponding to a zeroth order and a first order is compensated globally using a change in control parameters of at least one device of the magnetic resonance apparatus that is suitable for compensating for the global components (e.g., a reference oscillator and/or a gradient coil). In order to correct local higher-order eddy current fields in a volume of interest characterized by a prominent point, the residual eddy current fields remaining following compensation of the global component are developed around the point. Correction values for the control parameters are determined from the zeroth- and/or first-order local components of the development and are taken into account in the control of the magnetic resonance apparatus for magnetic resonance image acquisition.

摘要翻译： 提供一种用于补偿使用磁共振装置获得的磁共振图像中的涡流场的方法。 使用适于补偿全局分量的磁共振装置的至少一个装置的控制参数的变化来全局地补偿对应于零级和第一级的涡流场的全局分量（例如，参考 振荡器和/或梯度线圈）。 为了校正以突出点为特征的感兴趣的体积中的局部高阶涡流场，围绕该点开发在补偿全局分量之后剩余的剩余涡流场。 用于控制参数的校正值由显影的第零和/或一阶局部分量确定，并且在用于磁共振图像采集的磁共振装置的控制中被考虑。

公开(公告)号：US20140091797A1

公开(公告)日：2014-04-03

申请号：US14043995

申请日：2013-10-02

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01R33/54

CPC分类号： G01R33/54 ,  G01R33/56341

摘要： In the acquisition of MR data with diffusion information nuclear spins in a volume segment are excited with radiation of a diffusion coding module and a subsequent diffusion decoding module, and at least one RF pulse is radiated after the excitation, and the MR data are read out. At least one of a time period that defines a time interval between a point in time at which the spin echo condition is satisfied, and the echo time, a first time interval that defines a minimum time interval between the end of the diffusion coding module and the start of the diffusion decoding module, and a second time interval that defines a minimum time interval between the end of the excitation module, and the start of the diffusion coding module, and a third time interval that defines a minimum time interval between the end of the diffusion coding module and the start of the readout of the MR data, is set.

摘要翻译： 在利用扩散信息获取MR数据时，通过扩散编码模块和随后的扩散解码模块的辐射激发体积段中的核自旋，并且在激发之后辐射至少一个RF脉冲，并且读出MR数据 。 定义满足自旋回波条件的时间点与回波时间之间的时间间隔的时间段中的至少一个定义扩散编码模块的末端与最小时间间隔的第一时间间隔， 扩散解码模块的开始，以及定义激励模块的结束与扩散编码模块的开始之间的最小时间间隔的第二时间间隔，以及定义终端之间的最小时间间隔的第三时间间隔 的扩散编码模块和MR数据的读出的开始。

公开(公告)号：US08587293B2

公开(公告)日：2013-11-19

申请号：US12684158

申请日：2010-01-08

申请人： Stephan Biber ,  Thorsten Feiweier ,  Wolfgang Renz

发明人： Stephan Biber ,  Thorsten Feiweier ,  Wolfgang Renz

IPC分类号： G01B7/14 ,  G01B7/30 ,  G01R33/02

CPC分类号： G01R33/3642 ,  G01R33/341

摘要： A simple position determination is enabled by a device and a method to determine the position of a local coil in a magnetic resonance apparatus, wherein at least one signal emitted by at least one transmission coil is received by the local coil and is evaluated with a position determination device in order to determine the position of the local coil.

摘要翻译： 一种简单的位置确定是通过一种装置和方法来实现的，该装置和方法用于确定磁共振装置中局部线圈的位置，其中由至少一个传输线圈发射的至少一个信号由局部线圈接收并且用位置 确定装置，以确定局部线圈的位置。

公开(公告)号：US20130249550A1

公开(公告)日：2013-09-26

申请号：US13848965

申请日：2013-03-22

申请人： Thorsten Feiweier ,  Christof Krellmann ,  Bernd Kuehn ,  Dominik Paul ,  Josef Pfeuffer ,  Elisabeth Preusche ,  Katrin Wohlfarth

发明人： Thorsten Feiweier ,  Christof Krellmann ,  Bernd Kuehn ,  Dominik Paul ,  Josef Pfeuffer ,  Elisabeth Preusche ,  Katrin Wohlfarth

IPC分类号： G01R33/563

CPC分类号： G01R33/563 ,  G01R33/4833 ,  G01R33/4838 ,  G01R33/56527

摘要： In a method and a magnetic resonance (MR) system, a marked area is determined that demarcates a predetermined volume segment of the subject relative to the regions adjacent thereto. Nuclei in the predetermined volume segment are excited, or nuclei in a region adjacent thereto are saturated with an RF excitation pulse at the same time a magnetic field gradient is activated. The center frequency of a frequency range of the RF excitation pulse and the direction of the magnetic field gradient are adjusted dependent on resonant frequencies of substances present within the predetermined volume segment in order, starting from the predetermined volume segment to shift an actual excitation volume segment excited by the RF excitation pulse toward the marked area, or to shift a saturation volume saturated by the RF excitation pulse away from the marked area. MR data are then acquired from the predetermined volume segment.

摘要翻译： 在方法和磁共振（MR）系统中，确定标记的区域，其相对于与其相邻的区域划定对象的预定体积段。 在预定体积段中的核被激发，或者与其相邻的区域中的核被RF激励脉冲饱和，同时磁场梯度被激活。 RF激励脉冲的频率范围和磁场梯度的方向的中心频率根据预定体积段中存在的物质的谐振频率依次调整，从预定的音量段开始，以使实际的励磁音量段 通过RF激发脉冲激发到标记区域，或者使由RF激发脉冲饱和的饱和体积偏离标记区域。 然后从预定的音量段获取MR数据。

公开(公告)号：US20130088228A1

公开(公告)日：2013-04-11

申请号：US13649326

申请日：2012-10-11

申请人： Thorsten Feiweier ,  Bernd Kuehn

发明人： Thorsten Feiweier ,  Bernd Kuehn

IPC分类号： G01R33/56 ,  G01R33/38

CPC分类号： G01R33/4838 ,  G01R33/5607

摘要： In a method and apparatus for magnetic resonance (MR) imaging, a magnetization of nuclear spins in a subject is prepared in multiple preparation modules of an acquisition sequence. MR signals are acquired with at least one imaging module of the sequence. Spoiler gradient fields are generated in the multiple preparation modules in order to affect a transverse magnetization of the spins. The spoiler gradient fields that are applied in at least two different preparation modules are spatially varied along different directions. Spoiler gradient moments of the spoiler gradient fields are selected so that, for at least one of three orthogonal spatial directions, a weighted sum of the spoiler gradient moments that are applied along this spatial direction satisfies a threshold condition.

摘要翻译： 在用于磁共振（MR）成像的方法和装置中，在采集序列的多个准备模块中制备受试者的核自旋的磁化。 使用该序列的至少一个成像模块来获取MR信号。 扰流器梯度场在多个准备模块中产生，以影响自旋的横向磁化。 应用于至少两个不同准备模块的扰流板梯度场在不同方向上空间变化。 选择扰流板梯度场的扰流器梯度矩，使得对于三个正交空间方向中的至少一个，沿着该空间方向施加的扰流器梯度力矩的加权和满足阈值条件。

公开(公告)号：US20120068702A1

公开(公告)日：2012-03-22

申请号：US13231028

申请日：2011-09-13

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01R33/48

CPC分类号： G01R33/56509 ,  G01R33/4828 ,  G01R33/485 ,  G01R33/56341 ,  G01R33/56366

摘要： In a magnetic resonance method and apparatus, a series of magnetic resonance exposures of an examination subject is generated by implementing multiple first measurements (data acquisitions) with variation of a measurement parameter from acquisition-to-acquisition, which strongly influences a contrast of the first material type excited in the first measurements, implementing multiple second measurements in which a second material type is essentially selectively imaged that is less contrast-dependent with regard to this measurement parameter in a processor calculating spatial correction values for image data of the first measurements based on spatial differences between image data of different second measurements, and, also in the processor, spatially correcting image data of the first measurements (Di) and/or registration of image data of different first measurements to one another on the basis of the correction values.

摘要翻译： 在磁共振方法和装置中，通过采集与获取之间的测量参数的变化实现多次第一测量（数据采集）来产生检查对象的一系列磁共振曝光，这强烈地影响第一 在第一测量中激发的材料类型，实现多个第二测量，其中基本上选择性地成像第二材料类型，其在处理器中对于该测量参数的对比度依赖性较小，该处理器基于第一测量结果计算第一测量的图像数据的空间校正值，基于 基于校正值，不同的第二测量的图像数据之间的空间差异，以及在处理器中，空间校正第一测量（Di）的图像数据和/或不同的第一测量的图像数据的对准。

公开(公告)号：US20110241679A1

公开(公告)日：2011-10-06

申请号：US13076763

申请日：2011-03-31

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

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

IPC分类号： G01R33/48

CPC分类号： G01R33/56341 ,  G01R33/4835 ,  G01R33/56518

摘要： In a method and apparatus to reduce distortions in diffusion imaging, at least one first measurement is implemented with a first diffusion weighting for a number of slices that are spatially separated from one another and at least one second measurement is implemented with a second diffusion weighting for the number of slices that are spatially separated from one another. A deskewing function is determined as are correction parameters to deskew diffusion-weighted magnetic resonance images on the basis of the measurements, so that image information and/or correction parameters of different slices are linked with one another. The diffusion-weighted magnetic resonance images are distortion-corrected on the basis of the deskewing function and the correction parameters.

摘要翻译： 在减少扩散成像中的失真的方法和装置中，通过第一扩散加权来实现至少一个第一测量，所述第一扩散加权用于彼此空间上分离的多个片段，并且至少一个第二测量用第二扩散加权来实现， 在空间上彼此分离的切片的数量。 基于测量，确定去偏移功能，作为对偏移扩散加权磁共振图像的校正参数，使得不同切片的图像信息和/或校正参数相互链接。 扩散加权磁共振图像基于去偏置函数和校正参数进行失真校正。

公开(公告)号：US20110085722A1

公开(公告)日：2011-04-14

申请号：US12904312

申请日：2010-10-14

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G06K9/00 ,  G01R33/48

CPC分类号： G01R33/56341 ,  G01R33/5616 ,  G01R33/56518 ,  G01R33/56554

摘要： In a method and magnetic resonance apparatus for correction of image distortions that occur in acquisition of diffusion-weighted magnetic resonance images of an examination subject, a reference image is acquired without diffusion weighting, a first diffusion-weighted image is acquired for a diffusion direction, a second diffusion-weighted image is acquired for the same diffusion direction, with the acquisition of the second diffusion-weighted image taking place at least with a different diffusion weighting or a different diffusion gradient polarity than the acquisition of the first diffusion-weighted image. Distortion parameters for the correction of image distortions in the acquired diffusion-weighted images are acquired, and the first diffusion-weighted image is deskewed with a first set of deskewing parameters, and the second diffusion-weighted image is deskewed with a second set of deskewing parameters. The first set and second set of deskewing parameters are correlated, and the deskewing parameters are determined by simultaneous minimization of differences between the deskewed first image and the reference image and differentiation between the deskewed second image and the reference image.

摘要翻译： 在用于校正在检测对象的扩散加权磁共振图像的获取中发生的图像失真的方法和磁共振装置中，获取参考图像而不进行扩散加权，获得扩散方向的第一扩散加权图像， 对于相同的扩散方向获取第二扩散加权图像，其中第二扩散加权图像的获取至少与不同于第一扩散加权图像的获取的扩散加权或不同的扩散梯度极性发生。 获取用于校正所获取的扩散加权图像中的图像失真的失真参数，并且将第一扩散加权图像与第一组偏斜参数进行去相位校正，并且将第二扩散加权图像与第二组偏斜校正 参数。 第一组和第二组去偏移参数相关，并且通过同时最小化偏斜校正的第一图像和参考图像之间的差异以及在偏斜校正的第二图像与参考图像之间的差异来确定去歪斜参数。

公开(公告)号：US07649353B2

公开(公告)日：2010-01-19

申请号：US11508813

申请日：2006-08-22

申请人： Thorsten Feiweier ,  Razvan Lazar

发明人： Thorsten Feiweier ,  Razvan Lazar

IPC分类号： G01V3/00 ,  A61B5/055

CPC分类号： G01R33/3678 ,  G01R33/288 ,  G01R33/5612 ,  G01R33/5659

摘要： In an MR imaging method and apparatus which MR images with improved signal intensity, improved signal-noise ratio, improved contrast and improved image homogeneity can be acquired, the polarization state of the magnetic field of the RF pulses radiated into the measurement subject and of the resonance signals emitted by the measurement subject are distorted by the interaction with electrically-active materials of the measurement subject. In the transmission branch of the RF system the RF pulses emitted by a transmission coil are pre-distorted with regard to their polarization state. The sensitivity of the reception branch is optimized such that it is capable of detecting resonance signals independent of their polarization state.

摘要翻译： 在可以获得具有改善的信号强度，改善的信噪比，改善的对比度和改进的图像均匀性的MR图像的MR成像方法和装置中，辐射到测量对象中的RF脉冲的磁场的偏振态 由测量对象发射的共振信号通过与测量对象的电活性材料的相互作用而变形。 在RF系统的传输分支中，由发射线圈发射的RF脉冲关于它们的极化状态是预失真的。 接收分支的灵敏度被优化，使得它能够独立于它们的极化状态来检测谐振信号。