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1.发明授权公开(公告)号：US07902823B2
公开(公告)日：2011-03-08
申请号：US12150790
申请日：2008-05-01
CPC分类号： G01R33/5611 , G01R33/56308
摘要： Example methods, apparatus, and systems associated with dynamic parallel magnetic resonance imaging (DpMRI) are presented. One example system facilitates separating data associated with a dynamic portion of a dynamic magnetic resonance image from data associated with a static portion of the dynamic magnetic resonance image. The system computes reconstruction parameters for a DpMRI reconstruction processes for both the dynamic portion of the image and the static portion of the image. The example system produces a DpMRI image based on separate reconstructions of the dynamic portion of a dynamic magnetic resonance image and the static portion of a dynamic magnetic resonance image. The separate reconstructions may depend on separate sets of reconstruction parameters and on separated static data and dynamic data.
摘要翻译： 提出了与动态并联磁共振成像（DpMRI）相关的示例方法，设备和系统。 一个示例性系统有助于将与动态磁共振图像的动态部分相关联的数据与与动态磁共振图像的静态部分相关联的数据分离。 系统为图像的动态部分和图像的静态部分计算DpMRI重建过程的重建参数。 该示例系统基于动态磁共振图像的动态部分和动态磁共振图像的静态部分的单独重建产生DpMRI图像。 单独的重建可能取决于单独的重建参数集合和分离的静态数据和动态数据。
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2.发明申请公开(公告)号：US20090092303A1
公开(公告)日：2009-04-09
申请号：US12150790
申请日：2008-05-01
IPC分类号： G06K9/00
CPC分类号： G01R33/5611 , G01R33/56308
摘要： Example methods, apparatus, and systems associated with dynamic parallel magnetic resonance imaging (DpMRI) are presented. One example system facilitates separating data associated with a dynamic portion of a dynamic magnetic resonance image from data associated with a static portion of the dynamic magnetic resonance image. The system computes reconstruction parameters for a DpMRI reconstruction processes for both the dynamic portion of the image and the static portion of the image. The example system produces a DpMRI image based on separate reconstructions of the dynamic portion of a dynamic magnetic resonance image and the static portion of a dynamic magnetic resonance image. The separate reconstructions may depend on separate sets of reconstruction parameters and on separated static data and dynamic data.
摘要翻译： 提出了与动态并联磁共振成像（DpMRI）相关的示例方法，设备和系统。 一个示例性系统有助于将与动态磁共振图像的动态部分相关联的数据与与动态磁共振图像的静态部分相关联的数据分离。 系统为图像的动态部分和图像的静态部分计算DpMRI重建过程的重建参数。 该示例系统基于动态磁共振图像的动态部分和动态磁共振图像的静态部分的单独重建产生DpMRI图像。 单独的重建可能取决于单独的重建参数集合和分离的静态数据和动态数据。
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公开(公告)号：US07940044B2
公开(公告)日：2011-05-10
申请号：US12783779
申请日：2010-05-20
申请人： Mark A. Griswold , Martin Blaimer , Felix Breuer
发明人： Mark A. Griswold , Martin Blaimer , Felix Breuer
IPC分类号： G01V3/00
CPC分类号： G01R33/5611
摘要： Example systems, methods, and apparatus associated with determining a phase-encoding direction for parallel MRI are described. One example, method includes selecting a set of projection directions along which an MRI apparatus is to apply RF energy to an object to be imaged. The method includes controlling the MRI apparatus to selecting a set of projection directions and to acquire MR signal from the object through a set of detectors. The method includes analyzing the MR signal to identify individual sensitivities for members of the set of detectors and selecting a phase-encoding direction for a pMRI session based on the individual sensitivities for the members. The method produces a concrete, tangible, and useful result by controlling the MRI apparatus to perform the pMRI session based on the selected phase-encoding direction.
摘要翻译： 描述了与确定并行MRI的相位编码方向相关联的示例系统，方法和装置。 一个示例性方法包括选择一组投影方向，MRI设备将沿着该方向将RF能量应用于要成像的对象。 该方法包括控制MRI装置选择一组投影方向，并通过一组检测器从对象获取MR信号。 该方法包括分析MR信号以识别该组检测器的成员的个体灵敏度，并且基于成员的个体灵敏度来选择pMRI会话的相位编码方向。 该方法通过控制MRI装置基于所选择的相位编码方向执行pMRI会话来产生具体的，有形的和有用的结果。
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公开(公告)号：US07652474B2
公开(公告)日：2010-01-26
申请号：US12151025
申请日：2008-05-02
IPC分类号： G01V3/00
CPC分类号： G01R33/5611
摘要： Example systems, methods, and apparatus associated with conjugate symmetry in parallel imaging are provided. One example method includes controlling a parallel magnetic resonance imaging (pMRI) apparatus to acquire a first magnetic resonance (MR) signal from a first point in k-space using a phased array of receiving coils. The method also includes identifying a second point in k-space that is related to the first point by a conjugate symmetry relation. The relation may be, for example, a reflection, a rotation, and so on. The method also includes determining a second MR signal associated with the second point based, at least in part, on the first MR signal and the conjugate symmetry relation and then reconstructing an MR image based, at least in part, on both the first MR signal and the second MR signal.
摘要翻译： 提供了与并行成像中共轭对称性相关联的示例系统，方法和设备。 一个示例性方法包括控制并联磁共振成像（pMRI）装置，以使用接收线圈的相控阵列从k空间中的第一点获取第一磁共振（MR）信号。 该方法还包括通过共轭对称关系识别与第一点相关的k空间中的第二点。 该关系可以是例如反射，旋转等。 该方法还包括至少部分地基于第一MR信号和共轭对称关系确定与第二点相关联的第二MR信号，并且然后至少部分地基于第一MR信号和共轭对称关系重建MR图像 和第二MR信号。
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公开(公告)号：US20080278160A1
公开(公告)日：2008-11-13
申请号：US12150839
申请日：2008-05-01
申请人： Mark A. Griswold , Martin Blaimer
发明人： Mark A. Griswold , Martin Blaimer
IPC分类号： G01R33/54
CPC分类号： G01R33/5611
摘要： Example systems, methods, and apparatus facilitate providing a k-space line that is missing in an under-sampled time frame. The missing line is computed by applying a GRAPPA-operator to a known k-space line in the under-sampled time frame. One example method includes controlling a dynamic parallel magnetic resonance imaging (DpMRI) apparatus to acquire a first under-sampled time interleaved frame having at least one first k-space line and controlling the DpMRI apparatus to acquire a second under-sampled time interleaved frame having at least one second k-space line that neighbors the first k-space line. The method includes assembling a reference data set from the first under-sampled time frame and the second under-sampled time frame and then determining the GRAPPA-operator from neighboring k-space lines in the reference data set.
摘要翻译： 示例系统，方法和装置有助于提供在欠采样时间帧内丢失的k空间线。 通过将GRAPPA运算符应用到欠采样时间帧中的已知k空间线来计算缺失线。 一个示例性方法包括控制动态并行磁共振成像（DpMRI）装置以获取具有至少一个第一k空间线的第一欠采样时间交织帧，并且控制DpMRI装置获取第二欠采样时间交织帧，其具有 与第一k空间线相邻的至少一个第二k空间线。 该方法包括从第一欠采样时间帧和第二欠采样时间帧组合参考数据集，然后从参考数据集中的相邻k空间线确定GRAPPA算子。
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6.发明授权Dynamic pMRI using GRAPPA-operator with under-sampled time interleaved frames 有权使用具有欠采样时间交织帧的GRAPPA算子的动态pMRI公开(公告)号：US07863893B2
公开(公告)日：2011-01-04
申请号：US12150839
申请日：2008-05-01
申请人： Mark A. Griswold , Martin Blaimer
发明人： Mark A. Griswold , Martin Blaimer
IPC分类号： G01V3/00
CPC分类号： G01R33/5611
摘要： Example systems, methods, and apparatus facilitate providing a k-space line that is missing in an under-sampled time frame. The missing line is computed by applying a GRAPPA-operator to a known k-space line in the under-sampled time frame. One example method includes controlling a dynamic parallel magnetic resonance imaging (DpMRI) apparatus to acquire a first under-sampled time interleaved frame having at least one first k-space line and controlling the DpMRI apparatus to acquire a second under-sampled time interleaved frame having at least one second k-space line that neighbors the first k-space line. The method includes assembling a reference data set from the first under-sampled time frame and the second under-sampled time frame and then determining the GRAPPA-operator from neighboring k-space lines in the reference data set.
摘要翻译： 示例系统，方法和装置有助于提供在欠采样时间帧内丢失的k空间线。 通过将GRAPPA运算符应用到欠采样时间帧中的已知k空间线来计算缺失线。 一个示例性方法包括控制动态并行磁共振成像（DpMRI）装置以获取具有至少一个第一k空间线的第一欠采样时间交织帧，并且控制DpMRI装置获取第二欠采样时间交织帧，其具有 与第一k空间线相邻的至少一个第二k空间线。 该方法包括从第一欠采样时间帧和第二欠采样时间帧组合参考数据集，然后从参考数据集中的相邻k空间线确定GRAPPA算子。
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公开(公告)号：US07741843B2
公开(公告)日：2010-06-22
申请号：US12150848
申请日：2008-05-01
申请人： Mark A. Griswold , Martin Blaimer , Felix Breuer
发明人： Mark A. Griswold , Martin Blaimer , Felix Breuer
IPC分类号： G01V3/00
CPC分类号： G01R33/5611
摘要： Example systems, methods, and apparatus associated with determining a phase-encoding direction for parallel MRI are described. One example, method includes selecting a set of projection directions along which an MRI apparatus is to apply RF energy to an object to be imaged. The method includes controlling the MRI apparatus to selecting a set of projection directions and to acquire MR signal from the object through a set of detectors. The method includes analyzing the MR signal to identify individual sensitivities for members of the set of detectors and selecting a phase-encoding direction for a pMRI session based on the individual sensitivities for the members. The method produces a concrete, tangible, and useful result by controlling the MRI apparatus to perform the pMRI session based on the selected phase-encoding direction.
摘要翻译： 描述了与确定并行MRI的相位编码方向相关联的示例系统，方法和装置。 一个示例性方法包括选择一组投影方向，MRI设备将沿着该方向向待成像对象施加RF能量。 该方法包括控制MRI装置选择一组投影方向，并通过一组检测器从对象获取MR信号。 该方法包括分析MR信号以识别该组检测器的成员的个体灵敏度，并且基于成员的个体灵敏度来选择pMRI会话的相位编码方向。 该方法通过控制MRI装置基于所选择的相位编码方向执行pMRI会话来产生具体的，有形的和有用的结果。
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公开(公告)号：US20080290868A1
公开(公告)日：2008-11-27
申请号：US12150848
申请日：2008-05-01
申请人： Mark A. Griswold , Martin Blaimer , Felix Breuer
发明人： Mark A. Griswold , Martin Blaimer , Felix Breuer
IPC分类号： G01R33/54 , G01R33/483
CPC分类号： G01R33/5611
摘要： Example systems, methods, and apparatus associated with determining a phase-encoding direction for parallel MRI are described. One example, method includes selecting a set of projection directions along which an MRI apparatus is to apply RF energy to an object to be imaged. The method includes controlling the MRI apparatus to selecting a set of projection directions and to acquire MR signal from the object through a set of detectors. The method includes analyzing the MR signal to identify individual sensitivities for members of the set of detectors and selecting a phase-encoding direction for a pMRI session based on the individual sensitivities for the members. The method produces a concrete, tangible, and useful result by controlling the MRI apparatus to perform the pMRI session based on the selected phase-encoding direction.
摘要翻译： 描述了与确定并行MRI的相位编码方向相关联的示例系统，方法和装置。 一个示例性方法包括选择一组投影方向，MRI设备将沿着该方向向待成像对象施加RF能量。 该方法包括控制MRI装置选择一组投影方向，并通过一组检测器从对象获取MR信号。 该方法包括分析MR信号以识别该组检测器的成员的个体灵敏度，并且基于成员的个体灵敏度来选择pMRI会话的相位编码方向。 该方法通过控制MRI装置基于所选择的相位编码方向执行pMRI会话来产生具体的，有形的和有用的结果。
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公开(公告)号：US20080278161A1
公开(公告)日：2008-11-13
申请号：US12151025
申请日：2008-05-02
IPC分类号： G01R33/54
CPC分类号： G01R33/5611
摘要： Example systems, methods, and apparatus associated with conjugate symmetry in parallel imaging are provided. One example method includes controlling a parallel magnetic resonance imaging (pMRI) apparatus to acquire a first magnetic resonance (MR) signal from a first point in k-space using a phased array of receiving coils. The method also includes identifying a second point in k-space that is related to the first point by a conjugate symmetry relation. The relation may be, for example, a reflection, a rotation, and so on. The method also includes determining a second MR signal associated with the second point based, at least in part, on the first MR signal and the conjugate symmetry relation and then reconstructing an MR image based, at least in part, on both the first MR signal and the second MR signal.
摘要翻译： 提供了与并行成像中共轭对称性相关联的示例系统，方法和设备。 一个示例性方法包括控制并联磁共振成像（pMRI）装置，以使用接收线圈的相控阵列从k空间中的第一点获取第一磁共振（MR）信号。 该方法还包括通过共轭对称关系识别与第一点相关的k空间中的第二点。 该关系可以是例如反射，旋转等。 该方法还包括至少部分地基于第一MR信号和共轭对称关系来确定与第二点相关联的第二MR信号，然后至少部分地基于第一MR信号和共轭对称关系重建MR图像 和第二MR信号。
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公开(公告)号：US08368398B2
公开(公告)日：2013-02-05
申请号：US12685696
申请日：2010-01-12
IPC分类号： G01V3/00
CPC分类号： G01R33/5611 , G01R33/4824
摘要： Example systems, methods, and apparatus control a pMRI apparatus to produce a pulse sequence having an extended acquisition window, and overlapping phase-encoding gradients and read gradients. One example method controls a pMRI apparatus to produce a trajectory having Cartesian and non-Cartesian segments that sample in a manner that satisfies the Nyquist criterion in at least one region of a volume to be imaged. The pMRI apparatus is controlled to apply radio frequency energy to the volume according to the pulse sequence and following the trajectory and to acquire MR signal from the volume in response to the application of the RF energy. The MR signal includes a first component associated with the Cartesian segment of the trajectory and a second component associated with the non-Cartesian segment of the trajectory. The example method includes calibrating a reconstruction process using Nyquist-satisfying data from the second component.
摘要翻译： 示例系统，方法和装置控制pMRI装置以产生具有扩展采集窗口的脉冲序列，以及重叠的相位编码梯度和读取梯度。 一个示例性方法控制pMRI装置以产生具有笛卡尔和非笛卡尔分段的轨迹，其以满足待成像体积的至少一个区域中的奈奎斯特准则的方式进行采样。 控制pMRI装置根据脉冲序列并跟随轨迹将射频能量施加到体积，并响应于RF能量的应用从体积获取MR信号。 MR信号包括与轨迹的笛卡尔段相关联的第一分量和与轨迹的非笛卡尔段相关联的第二分量。 示例性方法包括使用来自第二组件的奈奎斯特满足数据校准重建过程。
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