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    COMPRESSED SENSING MR IMAGE RECONSTRUCTION USING CONSTRAINT FROM PRIOR ACQUISITION
    2.
    发明申请
    COMPRESSED SENSING MR IMAGE RECONSTRUCTION USING CONSTRAINT FROM PRIOR ACQUISITION 有权
    使用来自先前收购的约束的压缩感测MR图像重建

    公开(公告)号：US20140009156A1

    公开(公告)日：2014-01-09

    申请号：US14006244

    申请日：2012-02-28

    申请人： Mariya Ivanova Doneva ,  Stefanie Remmele ,  Peter Bornert ,  Peter Mazurkewitz ,  Julien Senegas ,  Jochen Keupp ,  Kay Nehrke

    发明人： Mariya Ivanova Doneva ,  Stefanie Remmele ,  Peter Bornert ,  Peter Mazurkewitz ,  Julien Senegas ,  Jochen Keupp ,  Kay Nehrke

    IPC分类号： G01R33/56

    CPC分类号： G01R33/56 ,  G01R33/4824 ,  G01R33/5608 ,  G01R33/5611 ,  G01R33/56509

    摘要： The invention relates to a method of MR imaging of at least a portion of a body (10) of a patient placed in an examination volume of a MR device (1), the method comprising the steps of: subjecting the portion of the body (10) to a first imaging sequence for acquiring a first signal data set (21); subjecting the portion of the body (10) to a second imaging sequence for acquiring a second signal data set (23), wherein the imaging parameters of the second imaging sequence differ from the imaging parameters of the first imaging sequence; reconstructing a MR image from the second signal data set (23) by means of regularization using the first signal data set (21) as prior information. Moreover, the invention relates to a MR device (1) and to a computer program for a MR device (1).

    摘要翻译： 本发明涉及放置在MR装置（1）的检查体积中的患者的身体（10）的至少一部分的MR成像方法，该方法包括以下步骤：对身体的部分（ 10）到用于获取第一信号数据集（21）的第一成像序列; 使所述身体（10）的所述部分经受第二成像序列以获取第二信号数据集（23），其中所述第二成像序列的成像参数与所述第一成像序列的成像参数不同; 通过使用第一信号数据集（21）的正则化作为先前信息，从第二信号数据集（23）重建MR图像。 此外，本发明涉及MR设备（1）和用于MR设备（1）的计算机程序。

    MR IMAGING WITH EXTENDED FIELD OF VIEW
    3.
    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。

    MR method for generating navigator pulses
    5.
    发明授权
    MR method for generating navigator pulses 失效
    用于产生导航器脉冲的MR方法

    公开(公告)号：US06777935B2

    公开(公告)日：2004-08-17

    申请号：US10306600

    申请日：2002-11-27

    申请人： Kay Nehrke ,  Peter Börnert

    发明人： Kay Nehrke ,  Peter Börnert

    IPC分类号： G01V300

    CPC分类号： G01R33/5676

    摘要： The invention relates to an MR method in which a navigator pulse is generated to excite a nuclear magnetization in a spatially limited volume by at least one RF pulse and at least two gradient magnetic fields having gradients which extend differently in respect of time and space. After the navigator pulse excitation, at least one MR signal is received from the volume in conjunction with a further gradient magnetic field for evaluation. In order to enhance the navigator pulse, a variation in time is imposed on the gradient magnetic fields in order to generate at least two MR signals which correspond to an excitation in the k space along mutually offset trajectories. The MR signals are combined.

    摘要翻译： 本发明涉及一种MR方法，其中产生导航脉冲以通过至少一个RF脉冲激励空间有限体积中的核磁化，并且至少两个梯度磁场具有相对于时间和空间不同地延伸的梯度。 在导航器脉冲激励之后，至少一个MR信号与另外一个用于评估的梯度磁场一起从该体积中接收。 为了增强导航脉冲，对梯度磁场施加时间变化，以便产生对应于相互偏移轨迹的k空间中的激励的至少两个MR信号。 MR信号被组合。

    MR method for generating MR signal corresponding to k-space excitations along mutually offset trajectories
    6.
    发明授权
    MR method for generating MR signal corresponding to k-space excitations along mutually offset trajectories 失效
    MR方法，用于沿着相互偏移的轨迹产生对应于k空间激励的MR信号

    公开(公告)号：US06573719B2

    公开(公告)日：2003-06-03

    申请号：US09728111

    申请日：2000-12-01

    申请人： Kay Nehrke ,  Peter Börnert

    发明人： Kay Nehrke ,  Peter Börnert

    IPC分类号： G01V300

    CPC分类号： G01R33/5676

    摘要： The invention relates to an MR method in which a navigator pulse is generated to excite a nuclear magnetization in a spatially limited volume by at least one RF pulse and at least two gradient magnetic fields having gradients which extend differently in respect of time and space. After the navigator pulse excitation, at least one MR signal is received from the volume in conjunction with a further gradient magnetic field for evaluation. In order to enhance the navigator pulse, a variation in time is imposed on the gradient magnetic fields in order to generate at least two MR signals which correspond to an excitation in the k space along mutually offset trajectories. The MR signals are combined.

    摘要翻译： 本发明涉及一种MR方法，其中产生导航脉冲以通过至少一个RF脉冲激励空间有限体积中的核磁化，并且至少两个梯度磁场具有相对于时间和空间不同地延伸的梯度。 在导航器脉冲激励之后，至少一个MR信号与另外一个用于评估的梯度磁场一起从该体积中接收。 为了增强导航脉冲，对梯度磁场施加时间变化，以便产生对应于相互偏移轨迹的k空间中的激励的至少两个MR信号。 MR信号被组合。

    Virtual coil emulation in parallel transmission MRI
    7.
    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
    8.
    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 using multi-channel RF excitation
    10.
    发明授权
    MR imaging using multi-channel RF excitation 有权
    MR成像采用多通道RF激发

    公开(公告)号：US08938281B2

    公开(公告)日：2015-01-20

    申请号：US13496085

    申请日：2010-09-27

    申请人： Miha Fuderer ,  Thomas Hendrik Rozijn ,  Ulrich Katscher ,  Kay Nehrke ,  Paul Royston Harvey

    发明人： Miha Fuderer ,  Thomas Hendrik Rozijn ,  Ulrich Katscher ,  Kay Nehrke ,  Paul Royston Harvey

    IPC分类号： A61B5/05 ,  G01R33/561 ,  G01R33/565

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

    摘要： The invention relates to a magnetic resonance imaging apparatus including an array of two or more RF antennas for transmitting RF pulses to and receiving MR signals from a subject positioned in an examination volume, and where the RF antennas have spatial transmit and receive sensitivity profiles. The apparatus is configured to control the temporal succession, the phase, and the amplitude of the RF feeding of each individual RF antenna. The apparatus is also configured to determine the phases and amplitudes from the spatial transmit sensitivity profiles of the RF antennas, and reconstruct a MR image from a combination of the received MR signals received via the individual RF antennas and from the spatial receive sensitivity profiles of the RF antennas. Further, the apparatus is configured to determine the spatial transmit sensitivity profiles of the RF antennas from the spatial receive sensitivity profiles of the RF antennas, or vice versa.

    摘要翻译： 本发明涉及一种磁共振成像设备，包括两个或更多个RF天线的阵列，用于将RF脉冲发送到定位在检查体积中的被摄体并接收MR信号，并且其中RF天线具有空间发射和接收灵敏度分布。 该装置被配置为控制每个单独RF天线的RF馈送的时间连续性，相位和幅度。 该装置还被配置为根据RF天线的空间发射灵敏度分布来确定相位和振幅，并且从经由各个RF天线接收的接收的MR信号和从RF天线的空间接收灵敏度分布的组合重建MR图像 射频天线。 此外，该装置被配置为根据RF天线的空间接收灵敏度分布来确定RF天线的空间发射灵敏度分布，反之亦然。