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公开(公告)号：US20090261825A1
公开(公告)日：2009-10-22
申请号：US12423941
申请日：2009-04-15
申请人： Jeffrey L. DUERK , Jeffrey L. Sunshine , Mark A. Griswold , Jamal J. Derakshan , Sherif G. Nour
发明人： Jeffrey L. DUERK , Jeffrey L. Sunshine , Mark A. Griswold , Jamal J. Derakshan , Sherif G. Nour
CPC分类号： G01R33/5613 , G01R33/5607 , G01R33/5614
摘要： Systems, methods, and other embodiments associated with controlling a magnetic resonance imaging (MRI) apparatus to perform a balanced steady state free precession (bSSFP) technique that includes magnetization preparation with differentiated velocity encoding and spoiling residual transverse magnetization are described. The example systems, methods, and other embodiments are also associated with acquiring a dark blood image in response to the bSSFP technique. A dark blood image is one in which NMR signal acquired from an object subjected to the bSSFP technique and magnetization preparation includes NMR signal from flowing spins and NMR signal from non-flowing spins in a desired ratio.
摘要翻译： 描述了与控制磁共振成像（MRI）装置执行平衡的稳态自由进动（bSSFP）技术相关联的系统，方法和其他实施例，其包括具有差分速度编码和破坏残余横向磁化的磁化准备。 示例系统，方法和其他实施例也与响应于bSSFP技术获取深色血液图像相关联。 深色血液图像是其中从经受bSSFP技术和磁化制备的物体获得的NMR信号包含来自流动自旋的NMR信号和来自非流动自旋的NMR信号以期望的比例。
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公开(公告)号：US08030919B2
公开(公告)日：2011-10-04
申请号：US12423941
申请日：2009-04-15
申请人： Jeffrey L. Duerk , Jeffrey L. Sunshine , Mark A. Griswold , Jamal J. Derakhshan , Sherif G. Nour
发明人： Jeffrey L. Duerk , Jeffrey L. Sunshine , Mark A. Griswold , Jamal J. Derakhshan , Sherif G. Nour
IPC分类号： G01V3/00
CPC分类号： G01R33/5613 , G01R33/5607 , G01R33/5614
摘要： Systems, methods, and other embodiments associated with controlling a magnetic resonance imaging (MRI) apparatus to perform a balanced steady state free precession (bSSFP) technique that includes magnetization preparation with differentiated velocity encoding and spoiling residual transverse magnetization are described. The example systems, methods, and other embodiments are also associated with acquiring a dark blood image in response to the bSSFP technique. A dark blood image is one in which NMR signal acquired from an object subjected to the bSSFP technique and magnetization preparation includes NMR signal from flowing spins and NMR signal from non-flowing spins in a desired ratio.
摘要翻译： 描述了与控制磁共振成像（MRI）装置执行平衡的稳态自由进动（bSSFP）技术相关联的系统，方法和其他实施例，其包括具有差分速度编码和破坏残余横向磁化的磁化准备。 示例系统，方法和其他实施例也与响应于bSSFP技术获取深色血液图像相关联。 深色血液图像是其中从经受bSSFP技术和磁化制备的物体获得的NMR信号包含来自流动自旋的NMR信号和来自非流动自旋的NMR信号以期望的比例。
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公开(公告)号：US08648593B2
公开(公告)日：2014-02-11
申请号：US13221999
申请日：2011-08-31
申请人： Jeffrey L. Duerk , Jeffrey L. Sunshine , Mark A. Griswold , Jamal J. Derakhshan , Sherif G. Nour
发明人： Jeffrey L. Duerk , Jeffrey L. Sunshine , Mark A. Griswold , Jamal J. Derakhshan , Sherif G. Nour
IPC分类号： G01V3/00
CPC分类号： G01R33/5613 , G01R33/5607 , G01R33/5614
摘要： Systems, methods, and other embodiments associated with controlling a magnetic resonance imaging (MRI) apparatus to perform a balanced steady state free precession (bSSFP) technique that includes magnetization preparation with differentiated velocity encoding and spoiling residual transverse magnetization are described. The example systems, methods, and other embodiments are also associated with acquiring a dark blood image in response to the bSSFP technique. A dark blood image is one in which NMR signal acquired from an object subjected to the bSSFP technique and magnetization preparation includes NMR signal from flowing spins and NMR signal from non-flowing spins in a desired ratio.
摘要翻译： 描述了与控制磁共振成像（MRI）装置执行平衡的稳态自由进动（bSSFP）技术相关联的系统，方法和其他实施例，其包括具有差分速度编码和破坏残余横向磁化的磁化准备。 示例系统，方法和其他实施例也与响应于bSSFP技术获取深色血液图像相关联。 深色血液图像是其中从经受bSSFP技术和磁化制备的物体获得的NMR信号包含来自流动自旋的NMR信号和来自非流动自旋的NMR信号以期望的比例。
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4.发明授权Mitigating saturation artifacts associated with intersecting plane TrueFISP acquisitions through grouped reverse centric phase encoding 有权通过分组的反向中心相位编码减少与相交平面TrueFISP采集相关联的饱和伪影公开(公告)号：US08169217B2
公开(公告)日：2012-05-01
申请号：US12423952
申请日：2009-04-15
IPC分类号： G01V3/00
CPC分类号： G01R33/5613 , G01R33/4818 , G01R33/5614 , G01R33/56518
摘要： Systems methods, and other embodiments associated with acquiring intersecting TrueFISP images using grouped reverse centric phase encoding are described. One example method includes controlling an MRI apparatus to produce a TrueFISP sequence that delays acquisition of the center of k-space to reduce saturation banding artifacts. The example method also includes controlling the MRI apparatus to produce a TrueFISP sequence that reduces eddy current artifacts by grouping (e.g., pairing) lines in k-space. The method concludes by acquiring NMR signal in response to the TrueFISP sequence.
摘要翻译： 描述了使用分组反向中心相位编码获取相交的TrueFISP图像相关联的系统方法和其他实施例。 一个示例性方法包括控制MRI装置以产生延迟获取k空间的中心以减少饱和带状伪影的TrueFISP序列。 该示例性方法还包括控制MRI装置以产生通过在k空间中分组（例如，配对）线来减少涡流伪像的TrueFISP序列。 该方法通过响应于TrueFISP序列获得NMR信号得出结论。
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公开(公告)号：US20100063380A1
公开(公告)日：2010-03-11
申请号：US12283196
申请日：2008-09-10
IPC分类号： A61B5/055
CPC分类号： G01R33/5614 , A61B5/055 , G01R33/5602 , G01R33/5607 , G01R33/56333
摘要： Systems, methods, and other embodiments associated with steady state dark blood magnetic resonance imaging MRI are described. One example method includes controlling an MRI apparatus to produce a steady state pulse sequence. The example method may also include controlling the MRI apparatus to generate radio frequency (RF) energy and magnetic gradients associated with the steady state pulse sequence. The steady state pulse sequence is different from conventional steady state pulses in that it is characterized by regularly spaced slice selection excitation pulses to excite a region to be imaged in an object to be imaged using a consistent repetition time (TR), a set of readout modules, and a set of a magnetization preparation modules. A magnetization preparation module is characterized by gradients associated with imaging not being active, gradients associated with slice selection being active, and RF pulses associated with slice selection being active.
摘要翻译： 描述与稳态暗血液磁共振成像MRI相关联的系统，方法和其它实施方案。 一个示例性方法包括控制MRI装置以产生稳态脉冲序列。 该示例性方法还可以包括控制MRI设备以产生与稳态脉冲序列相关联的射频（RF）能量和磁梯度。 稳态脉冲序列与常规稳态脉冲不同，其特征在于规则间隔的切片选择激励脉冲，以使用一致的重复时间（TR）来激发待成像对象中要成像的区域，一组读出 模块和一组磁化准备模块。 磁化准备模块的特征在于与成像不相关的梯度，与切片选择相关的梯度是有效的，以及与切片选择相关联的RF脉冲是有效的。
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公开(公告)号：US08208986B2
公开(公告)日：2012-06-26
申请号：US12283196
申请日：2008-09-10
IPC分类号： A61B5/05
CPC分类号： G01R33/5614 , A61B5/055 , G01R33/5602 , G01R33/5607 , G01R33/56333
摘要： Systems, methods, and other embodiments associated with steady state dark blood magnetic resonance imaging MRI are described. One example method includes controlling an MRI apparatus to produce a steady state pulse sequence. The example method may also include controlling the MRI apparatus to generate radio frequency (RF) energy and magnetic gradients associated with the steady state pulse sequence. The steady state pulse sequence is different from conventional steady state pulses in that it is characterized by regularly spaced slice selection excitation pulses to excite a region to be imaged in an object to be imaged using a consistent repetition time (TR), a set of readout modules, and a set of a magnetization preparation modules. A magnetization preparation module is characterized by gradients associated with imaging not being active, gradients associated with slice selection being active, and RF pulses associated with slice selection being active.
摘要翻译： 描述与稳态暗血液磁共振成像MRI相关联的系统，方法和其它实施方案。 一个示例性方法包括控制MRI装置以产生稳态脉冲序列。 该示例性方法还可以包括控制MRI设备以产生与稳态脉冲序列相关联的射频（RF）能量和磁梯度。 稳态脉冲序列与常规稳态脉冲不同，其特征在于规则间隔的切片选择激励脉冲，以使用一致的重复时间（TR）来激发待成像物体中要被成像的区域，一组读出 模块和一组磁化准备模块。 磁化准备模块的特征在于与成像不相关的梯度，与切片选择相关的梯度是有效的，以及与切片选择相关联的RF脉冲是有效的。
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公开(公告)号：US07652475B2
公开(公告)日：2010-01-26
申请号：US12151027
申请日：2008-05-02
IPC分类号： G01V3/00
CPC分类号： G01R33/54 , G01R33/5613
摘要： Example methods and apparatus control ratios between a maximum gradient amplitude (MGA) of a readout lobe (GREAD) in a Cartesian continuous sampling read gradient (CSRG) and an MGA of a dephase lobe (GDEPHASE) in the CSRG and an MGA of a rephase lobe (GREPHASE) in the CSRG, where the direction of GREAD is opposite to the direction of GDEPHASE, and GREPHASE. One example method includes controlling an MR apparatus to produce a CS gradient where GREAD and GDEPHASE correspond to the first ratio and where GREAD and GREPHASE correspond to the second ratio. One example method includes controlling the MR apparatus to acquire an MR signal in response to the CS gradient. The MR signal is acquired during the read lobe and during a portion of the dephase lobe and/or the rephase lobe. The method includes selectively altering the ratios based on an SNR ratio associated with the MR signal.
摘要翻译： 在笛卡尔连续采样读数梯度（CSRG）中的读出瓣（GREAD）的最大梯度幅度（MGA）和CSRG中的去相位突变（GDEPHASE）的MGA和重新形成的MGA之间的示例性方法和装置控制比 （GREPHASE）在CSRG中，GREAD的方向与GDEPHASE的方向相反，GREPHASE。 一个示例性方法包括控制MR装置以产生CS梯度，其中GREAD和GDEPHASE对应于第一比率，并且其中GREAD和GREPHASE对应于第二比率。 一个示例性方法包括控制MR装置以响应于CS梯度来获取MR信号。 在读波段期间以及在去相位波瓣和/或重新振荡波瓣的一部分期间获取MR信号。 该方法包括基于与MR信号相关联的SNR比选择性地改变比率。
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8.发明申请公开(公告)号：US20090261827A1
公开(公告)日：2009-10-22
申请号：US12423952
申请日：2009-04-15
IPC分类号： G01R33/44
CPC分类号： G01R33/5613 , G01R33/4818 , G01R33/5614 , G01R33/56518
摘要： Systems methods, and other embodiments associated with acquiring intersecting TrueFISP images using grouped reverse centric phase encoding are described. One example method includes controlling an MRI apparatus to produce a TrueFISP sequence that delays acquisition of the center of k-space to reduce saturation banding artifacts. The example method also includes controlling the MRI apparatus to produce a TrueFISP sequence that reduces eddy current artifacts by grouping (e.g., pairing) lines in k-space. The method concludes by acquiring NMR signal in response to the TrueFISP sequence.
摘要翻译： 描述了使用分组反向中心相位编码获取相交的TrueFISP图像相关联的系统方法和其他实施例。 一个示例性方法包括控制MRI装置以产生延迟获取k空间的中心以减少饱和带状伪影的TrueFISP序列。 该示例性方法还包括控制MRI装置以产生通过在k空间中分组（例如，配对）线来减少涡流伪像的TrueFISP序列。 该方法通过响应于TrueFISP序列获得NMR信号得出结论。
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公开(公告)号：US20080278162A1
公开(公告)日：2008-11-13
申请号：US12151027
申请日：2008-05-02
IPC分类号： G01R33/54
CPC分类号： G01R33/54 , G01R33/5613
摘要： Example methods and apparatus control ratios between a maximum gradient amplitude (MGA) of a readout lobe (GREAD) in a Cartesian continuous sampling read gradient (CSRG) and an MGA of a dephase lobe (GDEPHASE) in the CSRG and an MGA of a rephase lobe (GREPHASE) in the CSRG, where the direction of GREAD is opposite to the direction of GDEPHASE, and GREPHASE. One example method includes controlling an MR apparatus to produce a CS gradient where GREAD and GDEPHASE correspond to the first ratio and where GREAD and GREPHASE correspond to the second ratio. One example method includes controlling the MR apparatus to acquire an MR signal in response to the CS gradient. The MR signal is acquired during the read lobe and during a portion of the dephase lobe and/or the rephase lobe. The method includes selectively altering the ratios based on an SNR ratio associated with the MR signal.
摘要翻译： 笛卡尔连续采样读取梯度（CSRG）中的读出磁鼓的最大梯度振幅（MGA）与分离叶片的MGA（G
对应于第二比例。 一个示例性方法包括控制MR装置以响应于CS梯度来获取MR信号。 在读波段期间以及在去相位波瓣和/或重新振荡波瓣的一部分期间获取MR信号。 该方法包括基于与MR信号相关联的SNR比选择性地改变比率。 -
公开(公告)号：US07301342B2
公开(公告)日：2007-11-27
申请号：US11106870
申请日：2005-04-15
IPC分类号： G01V3/00
CPC分类号： G01R33/56 , G01R33/4824 , G01R33/5608 , G01R33/5611
摘要： Systems, methodologies, media, and other embodiments associated with improving MRI scan times and mitigating the effects of aliasing artifacts when the Nyquist data sampling threshold is not satisfied are described. One exemplary method embodiment includes producing an oscillating phase encoding gradient during a readout phase, where the gradient facilitates acquiring data from multiple phase encoding lines during a single readout phase. The exemplary method embodiment may also include reconstructing an image from the data acquired from two or more phase encoding lines.
摘要翻译： 描述了当奈奎斯特数据采样阈值不满足时，与改进MRI扫描时间和减轻混叠伪影的影响相关联的系统，方法，介质和其他实施例。 一个示例性方法实施例包括在读出阶段期间产生振荡相位编码梯度，其中梯度有助于在单个读出阶段期间从多个相位编码线获取数据。 示例性方法实施例还可以包括从从两个或多个相位编码线获取的数据重建图像。
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