公开(公告)号：US20110234221A1

公开(公告)日：2011-09-29

申请号：US13071778

申请日：2011-03-25

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01R33/48

CPC分类号： G01R33/56563 ,  G01R33/4818 ,  G01R33/56518 ,  G01R33/56536 ,  G01R33/56554

摘要： In a magnetic resonance system and operating method to determine phase correction parameters for a phase correction in MR image data, first and second phase correction data sets are thereby acquired and correlations are calculated between data of the second phase correction data set and data of the first phase correction data set. Phase correction parameters are determined, such as coefficients of a power series that approximates a curve of a phase difference between phase curves of the second and first phase correction data sets.

摘要翻译： 在用于确定MR图像数据中的相位校正的相位校正参数的磁共振系统和操作方法中，由此获取第一和第二相位校正数据组，并且在第二相位校正数据组的数据和第一相位校正数据的数据之间计算相关性 相位校正数据集。 确定相位校正参数，例如近似第二和第一相位校正数据集的相位曲线之间的相位差的曲线的功率系列的系数。

公开(公告)号：US20090309594A1

公开(公告)日：2009-12-17

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： G01R33/48

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。

公开(公告)号：US20090240379A1

公开(公告)日：2009-09-24

申请号：US12407853

申请日：2009-03-20

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G06F1/26

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

摘要： A computer receives information about a measurement sequence to be implemented by a medical imaging system. The computer determines at least one group of preliminary control sequences for power control devices of the medical imaging system so that the power control devices are caused to control (activate) image-influencing emission devices of the imaging medical system corresponding to the determined control sequences, and (insofar as it concerns the control of the image-influencing emission devices) with the measurement sequence to be implemented. The computer determines a load state curve for each group of preliminary control sequences using a model of at least the image-influencing emission devices and the power control devices for these devices using the respective initial load state and the respective control sequence of the image-influencing emission devices and the power control devices. The computer checks for each group whether each load state curve determined for this group remains below a load limit. The computer outputs as final control sequences the preliminary control sequences of one of the groups whose determined load state curves remain below the load limit.

摘要翻译： 计算机接收关于由医学成像系统实现的测量序列的信息。 计算机确定医疗成像系统的功率控制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（激活）对应于所确定的控制序列的成像医疗系统的影像影响发射装置， 并且（其涉及对图像影响发射装置的控制）与要实现的测量顺序相关联。 计算机使用至少影像影响发射装置的模型和这些装置的功率控制装置使用各自的初始负载状态和图像影响的相应控制顺序来确定每组初步控制序列的负载状态曲线 发射装置和功率控制装置。 计算机检查每个组是否为该组确定的每个负载状态曲线是否低于负载限制。 计算机作为最终控制序列输出其确定的负载状态曲线保持低于负载极限的组之一的初步控制序列。

公开(公告)号：US20090033328A1

公开(公告)日：2009-02-05

申请号：US12184399

申请日：2008-08-01

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01R33/58 ,  G01R33/483

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出的信号强度而适应。

公开(公告)号：US07482805B2

公开(公告)日：2009-01-27

申请号：US11545232

申请日：2006-10-10

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/246 ,  G01R33/5612 ,  G01R33/5659 ,  G01R33/583

摘要： In a method for determination of flip angle distributions for various antenna transmission configurations in a magnetic resonance system, magnetic resonance measurements are implemented with the various transmission configurations, with the reception configuration being identical for all implemented magnetic resonance measurements, and all magnetic resonance measurements for the various transmission configurations are implemented with a specific pulse sequence. This pulse sequence is selected such that the total function that describes the dependency of the image signal at a specific location on the flip angle achieved at this location with the radiated radio-frequency field, as well as on further MR-relevant parameters, can be factored into a first sub-function that describes the dependency of the image signal on the achieved flip angle and a second sub-function (Tb) that describes the dependency of the image signal on the further MR-relevant parameters, and such that the functional dependency of the image signal on the achieved flip angle is known. The absolute flip angle distribution is measured for a reference transmission configuration, and the flip angle distributions of the other transmission configurations are then respectively determined on the basis of the absolute flip angle distribution of the reference transmission configuration and on the basis of the ratio of the spatially-dependent image signals of the magnetic resonance measurements of the respective transmission configuration to the corresponding spatially-dependent image signals of the magnetic resonance measurement of the reference transmission configuration.

摘要翻译： 在用于确定磁共振系统中的各种天线传输配置的翻转角分布的方法中，使用各种传输配置来实现磁共振测量，其中接收配置对于所有实现的磁共振测量是相同的，并且对于 以特定脉冲序列实现各种传输配置。 选择该脉冲序列，使得描述在具有辐射射频场的该位置处实现的翻转角上的特定位置处的图像信号的依赖性的总函数以及另外的MR相关参数可以是 考虑到描述图像信号对实现的翻转角的依赖性的第一子功能和描述图像信号对另外的MR相关参数的依赖性的第二子功能（Tb），并且使得功能 已知图像信号对实现的翻转角的依赖性。 对于参考传输配置来测量绝对翻转角分布，然后分别基于参考传输配置的绝对翻转角分布来确定其他传输配置的翻转角分布，并且基于 相应的传输配置的磁共振测量的空间相关图像信号与参考传输配置的磁共振测量的对应的空间相关图像信号。

公开(公告)号：US07221162B2

公开(公告)日：2007-05-22

申请号：US10993644

申请日：2004-11-19

申请人： Thorsten Feiweier ,  Ralph Oppelt ,  Wolfgang Renz ,  Markus Vester

发明人： Thorsten Feiweier ,  Ralph Oppelt ,  Wolfgang Renz ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： G01R33/5659 ,  G01R33/246 ,  G01R33/34046 ,  G01R33/34061 ,  G01R33/3415 ,  G01R33/3607 ,  G01R33/5612

摘要： A radio frequency transmitter arrangement for a magnetic resonance apparatus has a distribution unit and an antenna unit, wherein the antenna unit, to generate radio frequency fields, is fashioned in at least two orthogonal modes, and the distribution unit is fashioned for the division of an RF transmission signal into at least two mode feed signals. At least one adjustment unit is provided to adjust the amplitude and/or phase of one of the mode feed signals and is connected with the antenna unit such that each of the mode feed signals generates a radio frequency field in one of the modes. A multiple transmitter arrangement has at least two radio frequency transmitter arrangements and at least two 180° hybrids. A method is provided to determine at least one setting parameter of the adjustment unit.

摘要翻译： 用于磁共振装置的射频发射器装置具有分配单元和天线单元，其中生成射频场的天线单元以至少两个正交模式形成，并且分配单元被形成用于划分 RF传输信号转换成至少两个模式馈送信号。 提供至少一个调整单元以调整模式馈送信号之一的幅度和/或相位，并且与天线单元连接，使得每个模式馈送信号在其中一种模式中产生射频场。 多发射机布置具有至少两个射频发射机布置和至少两个180°混合。 提供了一种确定调节单元的至少一个设定参数的方法。

公开(公告)号：US07218113B2

公开(公告)日：2007-05-15

申请号：US11036727

申请日：2005-01-14

申请人： Thorsten Feiweier ,  Ralf Ladebeck ,  Ralph Oppelt ,  Wolfgang Renz ,  Markus Vester

发明人： Thorsten Feiweier ,  Ralf Ladebeck ,  Ralph Oppelt ,  Wolfgang Renz ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： G01R33/5612 ,  G01R33/246 ,  G01R33/543 ,  G01R33/5659

摘要： In a magnetic resonance system and an operating method therefor, a B1 field distribution of a radio-frequency antenna is measured in at least one part of a examination volume of the magnetic resonance system, and then the RF pulses emitted by the radio-frequency antenna are optimized, based on the determined B1 field distribution, for homogenization in a specific volume. An effective volume within the examination volume is determined beforehand for each applied RF pulse and, based on the determined B1 field distribution, the appertaining RF pulse is individually adjusted such that the B1 field is homogenized within the effective volume of the RF pulse.

摘要翻译： 在磁共振系统及其操作方法中，在磁共振系统的检查体积的至少一部分中测量射频天线的B 1场分布，然后RF 基于确定的B SUB场分布来优化由射频天线发射的脉冲用于在特定体积中的均匀化。 对于每个施加的RF脉冲，预先确定检查体积内的有效体积，并且基于所确定的B SUB场分布，分别调整相应的RF脉冲，使得B <1> SUB>场在RF脉冲的有效体积内均匀化。

公开(公告)号：US20070085537A1

公开(公告)日：2007-04-19

申请号：US11545232

申请日：2006-10-10

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/246 ,  G01R33/5612 ,  G01R33/5659 ,  G01R33/583

摘要： In a method for determination of flip angle distributions for various antenna transmission configurations in a magnetic resonance system, magnetic resonance measurements are implemented with the various transmission configurations, with the reception configuration being identical for all implemented magnetic resonance measurements, and all magnetic resonance measurements for the various transmission configurations are implemented with a specific pulse sequence. This pulse sequence is selected such that the total function that describes the dependency of the image signal at a specific location on the flip angle achieved at this location with the radiated radio-frequency field, as well as on further MR-relevant parameters, can be factored into a first sub-function that describes the dependency of the image signal on the achieved flip angle and a second sub-function (Tb) that describes the dependency of the image signal on the further MR-relevant parameters, and such that the functional dependency of the image signal on the achieved flip angle is known. The absolute flip angle distribution is measured for a reference transmission configuration, and the flip angle distributions of the other transmission configurations are then respectively determined on the basis of the absolute flip angle distribution of the reference transmission configuration and on the basis of the ratio of the spatially-dependent image signals of the magnetic resonance measurements of the respective transmission configuration to the corresponding spatially-dependent image signals of the magnetic resonance measurement of the reference transmission configuration.

摘要翻译： 在用于确定磁共振系统中的各种天线传输配置的翻转角分布的方法中，使用各种传输配置来实现磁共振测量，其中接收配置对于所有实现的磁共振测量是相同的，并且对于 以特定脉冲序列实现各种传输配置。 选择该脉冲序列，使得描述在具有辐射射频场的该位置处实现的翻转角上的特定位置处的图像信号的依赖性的总函数以及另外的MR相关参数可以是 考虑到描述图像信号对实现的翻转角的依赖性的第一子功能和描述图像信号对另外的MR相关参数的依赖性的第二子功能（Tb），并且使得功能 已知图像信号对实现的翻转角的依赖性。 对于参考传输配置来测量绝对翻转角分布，然后分别基于参考传输配置的绝对翻转角分布来确定其他传输配置的翻转角分布，并且基于 相应的传输配置的磁共振测量的空间相关图像信号与参考传输配置的磁共振测量的对应的空间相关图像信号。

公开(公告)号：US07078901B2

公开(公告)日：2006-07-18

申请号：US11084421

申请日：2005-03-18

申请人： Thorsten Feiweier ,  Razvan Lazar

发明人： Thorsten Feiweier ,  Razvan Lazar

IPC分类号： G01V3/00

CPC分类号： G01R33/5659 ,  G01R33/246 ,  G01R33/3415

摘要： In a method and magnetic resonance system for homogenization of the B1 field for a magnetic resonance data acquisition with a number of iteration steps. An iteration step includes the following sub-steps: Measurement data are acquired that represent a B1 field distribution in at least one part of the examination volume of the magnetic resonance system. A B1 homogeneity analysis based on the acquired measurement data is automatically implemented. A specific homogenization action is automatically selected from among a number of possible homogenization actions based on the B1 homogeneity analysis, or the iterative homogenization method is ended if the diagnosed homogeneity is sufficient for an intended magnetic resonance measurement. The selected homogenization action is implemented.

摘要翻译： 在用于使多个迭代步骤进行磁共振数据采集的B SUB场的均匀化的方法和磁共振系统中。 迭代步骤包括以下子步骤：在磁共振系统的检查体积的至少一部分中获取表示B 1 SUB场分布的测量数据。 基于所获取的测量数据的B 1同质性分析被自动实现。 基于B 1均质性分析，可以从许多可能的均匀化动作中自动选择特定的均质化作用，或者如果诊断的均匀性对于预期的磁共振测量是足够的，则迭代均匀化方法结束。 实施所选择的均质化动作。

公开(公告)号：US20050245816A1

公开(公告)日：2005-11-03

申请号：US11095159

申请日：2005-03-31

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

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

IPC分类号： A61B5/05 ,  A61B5/055 ,  G01R33/28 ,  G01R33/30 ,  G01R33/34 ,  G01R33/341

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.

摘要翻译： 电介质元件由表现出磁共振弛豫时间的电介质材料形成，并且电介质材料中包含减轻电介质材料弛豫时间的松弛剂。 当从对象获取磁共振数据时，介电元件适于放置在被摄体上，并且在获取磁共振数据期间局部地影响对象中的B 1场分布。