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：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：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：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：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：US20050140369A1

公开(公告)日：2005-06-30

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： G01R33/34 ,  G01R33/36 ,  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：US20050083054A1

公开(公告)日：2005-04-21

申请号：US10921583

申请日：2004-08-19

申请人： Thorsten Feiweier ,  Franz Hebrank

发明人： Thorsten Feiweier ,  Franz Hebrank

IPC分类号： G01R33/565 ,  G01V3/00 ,  G06K9/00

CPC分类号： G01R33/5659

摘要： In a method and magnetic resonance apparatus for compensation of contrast inhomogeneities in magnetic resonance images caused by spatial distributions of the radio frequency field associated with the radio frequency pulses that are emitted in order to acquire magnetic resonance (MR) data, multiple individual MR images of a particular region of a subject are recorded with different radio frequency pulse sequences leading to different flip angles. A common contrast-homogenized image for the affected region then is generated based on the different individual images, so that within the contrast-homogenized image, intensity variations due to a distribution of the flip angle are smaller than in the individual images, at least in some areas.

摘要翻译： 在一种方法和磁共振装置中，用于补偿与为了获得磁共振（MR）数据而发射的射频脉冲相关联的射频场的空间分布引起的磁共振图像中的对比度不均匀性， 用不同的射频脉冲序列记录被摄体的特定区域，导致不同的翻转角度。 然后基于不同的单独图像生成受影响区域的常见对比均匀化图像，使得在对比均匀化图像内，由于翻转角分布引起的强度变化小于各个图像中的强度变化，至少在 一些地区。