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    MR imaging method with motion compensation
    1.
    发明授权
    MR imaging method with motion compensation 失效
    具有运动补偿的MR成像方法

    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。

    FLIP ANGLE IMAGING WITH IMPROVED B1 MAPPING FOR MULTI-RF TRANSMIT SYSTEMS
    2.
    发明申请
    FLIP ANGLE IMAGING WITH IMPROVED B1 MAPPING FOR MULTI-RF TRANSMIT SYSTEMS 有权
    具有改进的用于多射频发射系统的B1映射的翻转角成像

    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。

    Accelerated B1 mapping
    4.
    发明授权
    Accelerated B1 mapping 有权
    加速B1映射

    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）。

    Virtual coil emulation in parallel transmission MRI
    5.
    发明授权
    Virtual coil emulation in parallel transmission MRI 有权

    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.

    Flip angle imaging with improved B1 mapping for multi-RF transmit systems
    6.
    发明授权
    Flip angle imaging with improved B1 mapping for multi-RF transmit systems 有权
    用于多射频发射系统的改进B1映射的倒角成像

    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。

    MR IMAGING WITH EXTENDED FIELD OF VIEW
    7.
    发明申请
    MR IMAGING WITH EXTENDED FIELD OF VIEW 有权
    成像与扩展视野

    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。

    MRI OF A CONTINUOUSLY MOVING OBJECT INVOLVING MOTION COMPENSATION
    8.
    发明申请
    MRI OF A CONTINUOUSLY MOVING OBJECT INVOLVING MOTION COMPENSATION 审中-公开
    涉及运动补偿的连续移动对象的MRI

    公开(公告)号：US20090177076A1

    公开(公告)日：2009-07-09

    申请号：US12296936

    申请日：2007-04-05

    申请人： Bernd Aldefeld ,  Peter Boernert ,  Jochen Keupp ,  Johan Samuel Van Den Brink

    发明人： Bernd Aldefeld ,  Peter Boernert ,  Jochen Keupp ,  Johan Samuel Van Den Brink

    IPC分类号： A61B5/05

    CPC分类号： G01R33/56375 ,  G01R33/56383 ,  G01R33/56509 ,  G01R33/5673 ,  G01R33/5676

    摘要： A magnetic resonance examination system has an object carrier (14) to move an object to be examined relative to the field of view. A monitoring system (33) monitors examination circumstances under which magnetic resonance signals are acquired from the object within the field of view. In particular the monitoring system monitors the degree of physiological motion in the patient to be examined. A velocity control system (32) to control the velocity of the movement of the object relative to the field of view and to control the velocity on the basis of the monitored examination circumstances, i.e. the degree of physiological motion.

    摘要翻译： 磁共振检查系统具有用于相对于视场移动待检查物体的物体载体（14）。 监视系统（33）监视从视野内的物体获取磁共振信号的检查情况。 特别地，监测系统监测待检查患者的生理运动程度。 一种速度控制系统（32），用于控制物体相对于视场的移动速度，并且基于所监视的检查情况即生理运动的程度来控制速度。