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    Inherent limitation of the reduction factor in parallel imaging as a function of field strength
    1.
    发明申请
    Inherent limitation of the reduction factor in parallel imaging as a function of field strength 失效
    作为场强的函数的平行成像中的还原因子的固有限制

    公开(公告)号：US20050179433A1

    公开(公告)日：2005-08-18

    申请号：US10514437

    申请日：2003-05-12

    申请人： Florian Wiesinger ,  Klaas Pruessmann ,  Peter Boesiger

    发明人： Florian Wiesinger ,  Klaas Pruessmann ,  Peter Boesiger

    IPC分类号： G01R33/48 ,  A61B5/055 ,  G01R33/561 ,  G01V3/00

    CPC分类号： G01R33/5611

    摘要： A magnetic resonance imaging system comprises means for generating a main magnetic field with a main magnetic field strength an a plurality of magnetic resonance signal receiving positions, provided by one or more receiver antennae. The receiver antennae or coils have a spatial sensitivity profile for acquiring magnetic resonance signals at a predetermined degree of undersampling. Further means for reconstructing a magnetic resonance image from the set of undersampled magnetic resonance signals and the spatial sensitivity profiles are provided. In addition, means are provided for determining the degree of undersampling (R) in dependency of the given main field strength (B0) and the selected field-of-view (FOV).

    摘要翻译： 磁共振成像系统包括用于产生具有由一个或多个接收器天线提供的多个磁共振信号接收位置的主磁场强度的主磁场的装置。 接收器天线或线圈具有用于以预定的欠采样程度采集磁共振信号的空间灵敏度分布。 提供了用于从一组欠采样的磁共振信号重构磁共振图像和空间灵敏度分布的装置。 此外，提供了用于根据给定的主场强（B 0）和所选择的视场（FOV）来确定欠采样（R）的程度的装置。

    Prior-information-enhanced dynamic magnetic resonance imaging
    2.
    发明申请
    Prior-information-enhanced dynamic magnetic resonance imaging 失效
    先前信息增强动态磁共振成像

    公开(公告)号：US20050189942A1

    公开(公告)日：2005-09-01

    申请号：US10514438

    申请日：2003-05-09

    申请人： Jeffrey Tsao ,  Klaas Pruessmann ,  Peter Boesiger

    发明人： Jeffrey Tsao ,  Klaas Pruessmann ,  Peter Boesiger

    IPC分类号： A61B5/055 ,  G01R33/561 ,  G01V3/00

    CPC分类号： G01R33/5611 ,  G01R33/56308

    摘要： Successive magnetic resonance images are reconstructed from the respective sets of magnetic resonance signals of the dynamic series on the basis of the identified distribution of likelihood of changes and optionally the static reference image. The magnetic resonance signals are acquired by way of a receiver antennae system having a spatial sensitivity profile and in an undersampled fashion and the successive magnetic resonance images are reconstructed optionally also on the basis of the spatial sensitivity profile.

    摘要翻译： 基于所识别的变化可能性的分布和可选的静态参考图像，从动态序列的各组磁共振信号重建连续的磁共振图像。 磁共振信号通过具有空间灵敏度分布和欠采样方式的接收机天线系统获得，并且可选地还可以基于空间灵敏度分布来重构连续的磁共振图像。

    K-t blast and k-t sense magnetic resonance imaging
    3.
    发明申请
    K-t blast and k-t sense magnetic resonance imaging 有权
    K-t爆炸和k-t感测磁共振成像

    公开(公告)号：US20060208730A1

    公开(公告)日：2006-09-21

    申请号：US10563177

    申请日：2004-06-24

    申请人： Sebastian Kozerke ,  Jeffrey Tsao ,  Peter Boesiger ,  Klaas Pruessmann

    发明人： Sebastian Kozerke ,  Jeffrey Tsao ,  Peter Boesiger ,  Klaas Pruessmann

    IPC分类号： G01V3/00

    CPC分类号： G01R33/5611 ,  G01R33/5613 ,  G01R33/56308 ,  G01R33/56518

    摘要： This invention describes the combination of SSFP, a method for accelerating data acquisition, and an eddy current compensation method. This synergistic combination allows acquisition of images with high signal-to-noise ratio, high image contrast, high spatial and temporal resolutions, and good immunity against system instabilities. k-t BLAST and k-t SENSE are the preferred method for accelerating data acquisition, since they allow high acceleration factors, but other methods such as parallel imaging and reduced field-of-view imaging are also applicable. Typical applications of this invention include cine 3D cardiac imaging, and 2D real-time cardiac imaging.

    摘要翻译： 本发明描述了SSFP的组合，用于加速数据采集的方法和涡流补偿方法。 这种协同组合允许采集具有高信噪比，高图像对比度，高空间和时间分辨率以及对系统不稳定性的良好抗扰度的图像。 k-t BLAST和k-t SENSE是加速数据采集的首选方法，因为它们允许高加速度因素，但是也可以采用其他方法，如并行成像和减小的视场成像。 本发明的典型应用包括电影3D心脏成像和2D实时心脏成像。

    System and method of magnetic resonance imaging for producing successive magnetic resonance images
    5.
    发明授权
    System and method of magnetic resonance imaging for producing successive magnetic resonance images 有权
    用于产生连续磁共振图像的磁共振成像系统和方法

    公开(公告)号：US07330027B2

    公开(公告)日：2008-02-12

    申请号：US10563177

    申请日：2004-06-24

    申请人： Sebastian Kozerke ,  Jeffrey Tsao ,  Peter Boesiger ,  Klaas Pruessmann

    发明人： Sebastian Kozerke ,  Jeffrey Tsao ,  Peter Boesiger ,  Klaas Pruessmann

    IPC分类号： G01V3/00

    CPC分类号： G01R33/5611 ,  G01R33/5613 ,  G01R33/56308 ,  G01R33/56518

    摘要： This invention describes the combination of SSFP, a method for accelerating data acquisition, and an eddy current compensation method. This synergistic combination allows acquisition of images with high signal-to-noise ratio, high image contrast, high spatial and temporal resolutions, and good immunity against system instabilities. k-t BLAST and k-t SENSE are the preferred method for accelerating data acquisition, since they allow high acceleration factors, but other methods such as parallel imaging and reduced field-of-view imaging are also applicable. Typical applications of this invention include cine 3D cardiac imaging, and 2D real-time cardiac imaging.

    摘要翻译： 本发明描述了SSFP的组合，用于加速数据采集的方法和涡流补偿方法。 这种协同组合允许采集具有高信噪比，高图像对比度，高空间和时间分辨率以及对系统不稳定性的良好抗扰度的图像。 k-t BLAST和k-t SENSE是加速数据采集的首选方法，因为它们允许高加速度因素，但是还可以采用其他方法，如并行成像和减少的视场成像。 本发明的典型应用包括电影3D心脏成像和2D实时心脏成像。

    Magnetic resonance imaging method
    7.
    发明申请
    Magnetic resonance imaging method 审中-公开
    磁共振成像方法

    公开(公告)号：US20050192497A1

    公开(公告)日：2005-09-01

    申请号：US10514326

    申请日：2003-05-12

    申请人： Jeffrey Tsao ,  Klaas Pruessmann ,  Peter Boesiger

    发明人： Jeffrey Tsao ,  Klaas Pruessmann ,  Peter Boesiger

    IPC分类号： A61B5/055 ,  G01R33/56 ,  G01R33/561 ,  A61B5/05

    CPC分类号： G01R33/5611 ,  G01R33/5608

    摘要： In SENSitivity Encoding (SENSE), the reconstructed images are susceptible to amplified noise and/or artifacts if the underlying matrix inversion procedure is ill-conditioned. In this work, we propose to firstly apply the conventional SENSE algorithm to obtain an initial estimate. This initial estimate undergoes filtering to improve the signal-to-noise ratio. Then, it is fed back to the reconstruction as a reference image to estimate the amount of aliasing that may arise from regularization. We derive the optimal regularized solution that minimizes the weighted sum of artifact and noise power.

    摘要翻译： 在灵敏度编码（SENSE）中，如果潜在的矩阵求逆过程受到病态的影响，则重建的图像对放大的噪声和/或伪像敏感。 在这项工作中，我们提出首先应用传统的SENSE算法来获得初始估计。 该初始估计经过滤波以提高信噪比。 然后，将其作为参考图像反馈给重建，以估计正规化可能产生的混叠量。 我们推导出最小化伪像和噪声功率的加权和的最优正则化解。

    Magnetic resonance imaging method with accelerated data acquisition
    8.
    发明申请
    Magnetic resonance imaging method with accelerated data acquisition 有权
    磁共振成像方法加速数据采集

    公开(公告)号：US20050174113A1

    公开(公告)日：2005-08-11

    申请号：US10514337

    申请日：2003-05-08

    申请人： Jeffrey Tsao ,  Klaas Pruessmann ,  Peter Boesiger

    发明人： Jeffrey Tsao ,  Klaas Pruessmann ,  Peter Boesiger

    IPC分类号： G01R33/54 ,  A61B5/055 ,  G01R33/48 ,  G01R33/561 ,  G01V3/00

    CPC分类号： G01R33/5611 ,  G01R33/56308

    摘要： A method of dynamic magnetic resonance imaging comprising acquiring undersampled magnetic resonance signels for successive temporal time slots. In a space spanned by geometrical space and temporal frequency and on the basic of a priori information the aliased difference magnetic resonance data which are gained by subtracting for respective k-space sampling positions data of a baseline magnetic resonance image from the undersampled magnetic resonance signals are decomposed into difference data which essentially pertain to individual spatial positions at individual time slots.

    摘要翻译： 一种动态磁共振成像方法，包括获取用于连续时间时隙的欠采样磁共振信号。 在由几何空间和时间频率跨越的空间中，并且在先验信息的基础上，通过从欠采样的磁共振信号中减去相应k空间采样位置数据的基线磁共振图像获得的混叠差分磁共振数据是 分解为差异数据，其基本上与各个时隙上的个体空间位置相关。

    Inherent limitation of the reduction factor in parallel imaging as a function of field strength
    9.
    发明授权
    Inherent limitation of the reduction factor in parallel imaging as a function of field strength 失效
    作为场强的函数的平行成像中的还原因子的固有限制

    公开(公告)号：US07061238B2

    公开(公告)日：2006-06-13

    申请号：US10514437

    申请日：2003-05-12

    申请人： Florian Wiesinger ,  Klaas Paul Pruessmann ,  Peter Boesiger

    发明人： Florian Wiesinger ,  Klaas Paul Pruessmann ,  Peter Boesiger

    IPC分类号： G01V3/00

    CPC分类号： G01R33/5611

    摘要： A magnetic resonance imaging system comprises means for generating a main magnetic field with a main magnetic field strength an a plurality of magnetic resonance signal receiving positions, provided by one or more receiver antennae. The receiver antennae or coils have a spatial sensitivity profile for acquiring magnetic resonance signals at a predetermined degree of undersampling. Further means for reconstructing a magnetic resonance image from the set of undersampled magnetic resonance signals and the spatial sensitivity profiles are provided. In addition, means are provided for determining the degree of undersampling (R) in dependency of the given main field strength (B0) and the selected field-of-view (FOV).

    摘要翻译： 磁共振成像系统包括用于产生具有由一个或多个接收器天线提供的多个磁共振信号接收位置的主磁场强度的主磁场的装置。 接收器天线或线圈具有用于以预定的欠采样程度采集磁共振信号的空间灵敏度分布。 提供了用于从一组欠采样的磁共振信号重构磁共振图像和空间灵敏度分布的装置。 此外，提供了用于根据给定的主场强（B 0）和所选择的视场（FOV）来确定欠采样（R）的程度的装置。