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公开(公告)号:US20100034447A1
公开(公告)日:2010-02-11
申请号:US12161034
申请日:2007-01-04
申请人: Oliver Geier , Dietbert Hahn , Herbert Koestler
发明人: Oliver Geier , Dietbert Hahn , Herbert Koestler
IPC分类号: G06K9/00
CPC分类号: G01R33/5611 , G01R33/482 , G01R33/56545
摘要: In a method for magnetic resonance imaging, k-space is sampled using density weighted data acquisition or acquisition weighted data acquisition, with at least one region of k-space being intentionally undersampled with respect to the Nyquist criterion. Reconstruction of the MR image is performed using a parallel imaging method, with the influence in the reconstructed image of the missing k-space data, as a result of the undersampling, being reduced.
摘要翻译: 在用于磁共振成像的方法中,使用密度加权数据采集或采集加权数据采集来对k空间进行采样,其中k空间的至少一个区域有意地相对于奈奎斯特准则被欠采样。 使用并行成像方法进行MR图像的重建,由于欠采样的结果,丢失的k空间数据的重建图像的影响减小。
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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:US08184879B2
公开(公告)日:2012-05-22
申请号:US12161034
申请日:2007-01-04
申请人: Oliver Geier , Dietbert Hahn , Herbert Koestler
发明人: Oliver Geier , Dietbert Hahn , Herbert Koestler
CPC分类号: G01R33/5611 , G01R33/482 , G01R33/56545
摘要: In a method for magnetic resonance imaging, k-space is sampled using density weighted data acquisition or acquisition weighted data acquisition, with at least one region of k-space being intentionally undersampled with respect to the Nyquist criterion. Reconstruction of the MR image is performed using a parallel imaging method, with the influence in the reconstructed image of the missing k-space data, as a result of the undersampling, being reduced.
摘要翻译: 在用于磁共振成像的方法中,使用密度加权数据采集或采集加权数据采集来对k空间进行采样,其中k空间的至少一个区域有意地相对于奈奎斯特准则被欠采样。 使用并行成像方法进行MR图像的重建,由于欠采样的结果,丢失的k空间数据的重建图像的影响减小。
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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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