公开(公告)号：US20110026799A1

公开(公告)日：2011-02-03

申请号：US12933897

申请日：2009-03-26

申请人： Kay Nehrke ,  Peter Boernert ,  Tobias Ratko Voigt ,  Ulrich Katscher

发明人： Kay Nehrke ,  Peter Boernert ,  Tobias Ratko Voigt ,  Ulrich Katscher

IPC分类号： G06K9/00

CPC分类号： G01R33/586 ,  G01R33/246 ,  G01R33/3415 ,  G01R33/5612 ,  G01R33/56518 ,  G01R33/5659

摘要： A magnetic resonance method includes performing a plurality of magnetic resonance excitation operations each using a different sub-set of a set of radio frequency transmit coils (30), each sub-set including more than one radio frequency transmit coil, acquiring magnetic resonance data responsive to each said magnetic resonance excitation operation, and computing a B1 or flip angle map for each radio frequency transmit coil of the set of radio frequency transmit coils based on the acquired magnetic resonance data. A magnetic resonance method includes performing an actual flip angle mapping (AFI) sequence using a radio frequency transmit coil (32) with a ratio TR1:TR2 of the TR times of the AFI sequence selected to be rational, acquiring magnetic resonance data responsive to said AFI sequence, and computing a B1 or flip angle map for the radio frequency transmit coil based on the acquired magnetic resonance data.

摘要翻译： 磁共振方法包括使用一组射频发射线圈（30）的不同子集执行多个磁共振激励操作，每个子集包括多于一个射频发射线圈，响应于磁共振数据 到每个所述磁共振激励操作，以及基于所获取的磁共振数据计算所述射频发射线圈组中的每个射频发射线圈的B1或翻角图。 磁共振方法包括使用射频发射线圈（32）执行实际的翻转角映射（AFI）序列，其中AFI序列的TR次的比值TR1：TR2被选择为合理，获取响应于所述的 AFI序列，并且基于获取的磁共振数据计算用于射频发射线圈的B1或翻转角图。

公开(公告)号：US06587707B2

公开(公告)日：2003-07-01

申请号：US09880197

申请日：2001-06-13

申请人： Kay Nehrke ,  Peter Boernert ,  Bernd Aldefeld ,  Michael Harald Kuhn ,  Dirk Manke

发明人： Kay Nehrke ,  Peter Boernert ,  Bernd Aldefeld ,  Michael Harald Kuhn ,  Dirk Manke

IPC分类号： A61B5055

CPC分类号： G01R33/5676

摘要： An MR imaging method wherein motion of an object to be imaged is examined during a preparation phase preceding the actual MR examination. The necessary sequences for the subsequent MR examination are modified during the examination to compensate for the motion based on motion parameters calculated during the preparation phase or motion parameters derived from the motion parameters calculated during the preparation phase based on a correlation between the motion parameters.

摘要翻译： 一种MR成像方法，其中在实际MR检查之前的准备阶段检查待成像对象的运动。 在检查期间修改用于后续MR检查的必要序列，以基于在准备阶段期间计算的运动参数或基于运动参数之间的相关性在准备阶段期间计算的运动参数导出的运动参数来补偿运动。

公开(公告)号：US10342558B2

公开(公告)日：2019-07-09

申请号：US10573727

申请日：2004-09-10

申请人： Michael C. Steckner ,  Peter Boernert ,  Kay Nehrke

发明人： Michael C. Steckner ,  Peter Boernert ,  Kay Nehrke

IPC分类号： A61B5/11 ,  A61N5/10 ,  A61N7/02 ,  A61B17/00 ,  A61B34/10 ,  A61B34/20 ,  A61B5/055 ,  A61B90/00 ,  A61B17/225

摘要： A target treatment apparatus for treating a target region (130) within a subject (140) is provided. The apparatus includes an MRI apparatus (100) for generating MR images during an MR scan of the subject disposed within an examination region (110). The apparatus further includes an MRI localizer (150) for receiving the image data from the MRI apparatus wherein the target (130) is localized and a reference marker localizer (160, 160′) for non-invasively receiving reference data from a plurality of reference points disposed in proximity to the target wherein the reference points are localized. A tracking processor (300) is also included in the apparatus for receiving localized data from the MRI localizer wherein a relationship between the reference markers and the target region is generated.

公开(公告)号：US08847593B2

公开(公告)日：2014-09-30

申请号：US13257317

申请日：2010-03-22

申请人： Peter Boernert ,  Kay Nehrke

发明人： Peter Boernert ,  Kay Nehrke

IPC分类号： G01V3/00

CPC分类号： G01R33/5612 ,  G01R33/246 ,  G01R33/5659 ,  G01R33/583 ,  G01R33/586

摘要： A method comprises: performing a number of B i field mapping sequences (24) using a set of radio frequency transmit coils (11) to acquire a B1 field mapping data set wherein said number is less than a number of radio frequency transmit coils in the set of radio frequency transmit coils; and determining coil sensitivities (30) for the set of radio frequency transmit coils based on the acquired B1 field mapping data set. In some embodiments, the performed B1 field mapping sequences are defined by (i) performing a linear transform (40) on the set of radio frequency transmit coils to generate a set of orthogonal virtual radio frequency transmit coils (42) and (ii) selecting (44) a sub-set (46) of the set of orthogonal virtual radio frequency transmit coils that define the performed B1 field mapping sequences.

摘要翻译： 一种方法包括：使用一组射频发射线圈（11）来执行多个B i场映射序列（24），以获取B1场映射数据集，其中所述数小于所述射频发射线圈的数量 射频发射线圈组; 以及基于所获取的B1场映射数据集来确定所述一组射频发射线圈的线圈灵敏度（30）。 在一些实施例中，所执行的B1场映射序列由（i）在射频发射线圈组上执行线性变换（40）来定义，以产生一组正交虚拟射频发射线圈（42）和（ii）选择 （44）定义所执行的B1场映射序列的所述一组正交虚拟射频发射线圈的子集（46）。

公开(公告)号：US09689945B2

公开(公告)日：2017-06-27

申请号：US13816305

申请日：2011-08-15

申请人： Kay Nehrke ,  Peter Boernert

发明人： Kay Nehrke ,  Peter Boernert

IPC分类号： G01V3/00 ,  G01R33/54 ,  G01R33/561 ,  G01R33/565

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

摘要： A virtual coil emulation method is used in a magnetic resonance imaging scan for acquiring a magnetic resonance image of an object (10). The scan is performed by an MR system (1) using a physical coil arrangement (9; 11; 12; 13) including a set of individual transmit coils. The coils are adapted for transmission of a desired RF transmit field to the object (10) for magnetic resonance spin excitation of the object (10). Each coil is associated with a physical transmit channel. The RF transmit field corresponds to a virtual arrangement of two or more of the coils. Virtual transmit channel properties include virtual transmit channel weights are assigned to the RF transmit field which describe the virtual complex RF field amplitudes with respect to each individual coil of the virtual coil arrangement to be applied to the physical coils (9; 11; 12; 13) for generating the RF transmit field.

公开(公告)号：US08698495B2

公开(公告)日：2014-04-15

申请号：US12933897

申请日：2009-03-26

申请人： Kay Nehrke ,  Peter Boernert ,  Tobias Ratko Voigt ,  Ulrich Katscher

发明人： Kay Nehrke ,  Peter Boernert ,  Tobias Ratko Voigt ,  Ulrich Katscher

IPC分类号： G01V3/00

CPC分类号： G01R33/586 ,  G01R33/246 ,  G01R33/3415 ,  G01R33/5612 ,  G01R33/56518 ,  G01R33/5659

摘要： A magnetic resonance method includes performing a plurality of magnetic resonance excitation operations each using a different sub-set of a set of radio frequency transmit coils (30), each sub-set including more than one radio frequency transmit coil, acquiring magnetic resonance data responsive to each said magnetic resonance excitation operation, and computing a B1 or flip angle map for each radio frequency transmit coil of the set of radio frequency transmit coils based on the acquired magnetic resonance data. A magnetic resonance method includes performing an actual flip angle mapping (AFI) sequence using a radio frequency transmit coil (32) with a ratio TR1:TR2 of the TR times of the AFI sequence selected to be rational, acquiring magnetic resonance data responsive to said AFI sequence, and computing a B1 or flip angle map for the radio frequency transmit coil based on the acquired magnetic resonance data.

摘要翻译： 磁共振方法包括使用一组射频发射线圈（30）的不同子集执行多个磁共振激励操作，每个子集包括多于一个射频发射线圈，响应于磁共振数据 到每个所述磁共振激励操作，以及基于所获取的磁共振数据计算所述射频发射线圈组中的每个射频发射线圈的B1或翻角图。 磁共振方法包括使用射频发射线圈（32）执行实际的翻转角映射（AFI）序列，其中AFI序列的TR次的比值TR1：TR2被选择为合理，获取响应于所述的 AFI序列，并且基于获取的磁共振数据计算用于射频发射线圈的B1或翻转角图。

公开(公告)号：US20110112392A1

公开(公告)日：2011-05-12

申请号：US13000386

申请日：2009-06-18

申请人： Peter Boernert ,  Jochen Keupp ,  Peter Koken ,  Kay Nehrke

发明人： Peter Boernert ,  Jochen Keupp ,  Peter Koken ,  Kay Nehrke

IPC分类号： A61B5/055

CPC分类号： G01R33/56375 ,  G01R33/56383

摘要： Magnetic resonance examination system comprises displaceable carrier for supporting an object to be examined. The carrier can be moved over a two dimensional area. The magnetic resonance examination system is configured to acquire sets of magnetic resonance signals from the object for various positions of the carrier in the two dimensional area.

摘要翻译： 磁共振检查系统包括用于支撑被检查物体的可移位载体。 载体可以在二维区域上移动。 磁共振检查系统被配置为从二维区域中的载体的各个位置获取来自物体的磁共振信号。

公开(公告)号：US09797973B2

公开(公告)日：2017-10-24

申请号：US13000386

申请日：2009-06-18

申请人： Peter Boernert ,  Jochen Keupp ,  Peter Koken ,  Kay Nehrke

发明人： Peter Boernert ,  Jochen Keupp ,  Peter Koken ,  Kay Nehrke

IPC分类号： A61B5/00 ,  G01R33/563

CPC分类号： G01R33/56375 ,  G01R33/56383

摘要： Magnetic resonance examination system comprises displaceable carrier for supporting an object to be examined. The carrier can be moved over a two dimensional area. The magnetic resonance examination system is configured to acquire sets of magnetic resonance signals from the object for various positions of the carrier in the two dimensional area.

公开(公告)号：US08890524B2

公开(公告)日：2014-11-18

申请号：US13260580

申请日：2010-04-01

申请人： Peter Boernert ,  Ingmar Graesslin ,  Kay Nehrke

发明人： Peter Boernert ,  Ingmar Graesslin ,  Kay Nehrke

IPC分类号： G01R33/48 ,  G01R33/34 ,  G01R33/565 ,  G01R33/28 ,  G01R33/3415 ,  G01R33/561 ,  G01R33/54

CPC分类号： G01R33/3415 ,  G01R33/288 ,  G01R33/543 ,  G01R33/5612 ,  G01R33/5659

摘要： When generating an MR image using a multi-channel transmit coil arrangement, SAR is reduced by employing a number of different RF pulses in a single scan. Each RF pulse exhibits a different performance and/or accuracy, resulting in different RF pulse-specific SAR values. As a result, the RF pulses differ slightly in actual excitation pattern, B1 waveform and/or k-space trajectory, etc. The average SAR over a single scan is thus reduced compared to a fixed RF pulse, without compromising image quality.

摘要翻译： 当使用多通道发射线圈装置产生MR图像时，通过在单次扫描中采用多个不同的RF脉冲来减小SAR。 每个RF脉冲表现出不同的性能和/或精度，导致不同的RF脉冲特定SAR值。 结果，RF脉冲在实际激励模式，B1波形和/或k空间轨迹等方面略有差异。与固定的RF脉冲相比，单次扫描的平均SAR相比降低，而不影响图像质量。

公开(公告)号：US08736265B2

公开(公告)日：2014-05-27

申请号：US13063472

申请日：2009-09-10

申请人： Peter Boernert ,  Peter Koken ,  Kay Nehrke ,  Ulrich Katscher ,  Ingmar Graesslin

发明人： Peter Boernert ,  Peter Koken ,  Kay Nehrke ,  Ulrich Katscher ,  Ingmar Graesslin

IPC分类号： G01R33/34

CPC分类号： G01R33/583 ,  G01R33/246 ,  G01R33/3415 ,  G01R33/4838 ,  G01R33/5612 ,  G01R33/5659 ,  G01R33/586

摘要： The invention relates to a method of acquiring MRI image data comprising the following steps: performing a 3-dimensional B1 mapping of a first volume using a first voxel size, selecting an MRI protocol, performing the B1-shim in accordance with the MRI protocol, performing the MRI protocol to acquire MRI imaging data of a second volume using a second voxel size, wherein the first voxel size is larger than the second voxel size, wherein the first volume is larger than the second volume, and wherein the second volume is contained within the first volume.

摘要翻译： 本发明涉及一种获取MRI图像数据的方法，包括以下步骤：使用第一体素大小执行第一体积的3维B1映射，选择MRI协议，根据MRI协议执行B1-垫片， 执行MRI协议以使用第二体素尺寸获取第二体积的MRI成像数据，其中所述第一体素大小大于所述第二体素大小，其中所述第一体积大于所述第二体积，并且其中所述第二体积被包含 在第一卷内。