公开(公告)号：US08482280B2

公开(公告)日：2013-07-09

申请号：US12693100

申请日：2010-01-25

申请人： Donglai Huo ,  James Grant Pipe

发明人： Donglai Huo ,  James Grant Pipe

IPC分类号： G01R33/4818 ,  G01R33/4824 ,  G01R33/5611

CPC分类号： G01R33/5617 ,  G01R33/4824 ,  G01R33/5611 ,  G01R33/56341

摘要： A system and method include a computer readable storage medium having stored thereon a computer program comprising instructions which when executed by a computer cause the computer to apply a first plurality of radio frequency (RF) pulses during a first repetition time (TR) interval of a magnetic resonance (MR) pulse sequence. The instructions also cause the computer to apply a first plurality of gradient pulses and acquire the MR data during application of each gradient pulse of the first plurality of gradient pulses between an adjacent pair of RF pulses of the first plurality of RF pulses. Each gradient pulse of the first plurality of gradient pulses is configured to allow acquisition of MR data for a respective first bladelet passing through a center of k-space, wherein the first bladelets are non-parallel with each other. The instructions also cause the computer to reconstruct the acquired MR data into an image.

摘要翻译： 一种系统和方法包括其上存储有计算机程序的计算机可读存储介质，所述计算机程序包括当计算机执行时使计算机在第一重复时间（TR）间隔期间施加第一多个射频（RF）脉冲的指令， 磁共振（MR）脉冲序列。 所述指令还使得所述计算机在所述第一多个RF脉冲的相邻的一对RF脉冲之间的所述第一多个梯度脉冲的每个梯度脉冲的应用期间，施加第一多个梯度脉冲并获取MR数据。 第一多个梯度脉冲的每个梯度脉冲被配置为允许获取通过k空间的中心的相应的第一叶片的MR数据，其中第一叶片彼此不平行。 指令还使计算机将所获取的MR数据重构成图像。

公开(公告)号：US20100060280A1

公开(公告)日：2010-03-11

申请号：US12620037

申请日：2009-11-17

申请人： James Grant Pipe

发明人： James Grant Pipe

IPC分类号： G01R33/48

CPC分类号： G01R33/54 ,  G01R33/4616 ,  G01R33/56341

摘要： A system and method are provided herein for designing and transmitting RF pulses which cause a reduced off-resonance magnetization transfer saturation. An RF pulse shape may be optimized according to a set of Bloch solutions defining a desired magnetization profile. An RF pulse may be transmitted according to this optimized shape according to a k-space trajectory which traverses a high amplitude portion of the RF pulse more times than one or more low amplitude portions. In addition, a generally alternating slice select gradient may be applied during transmission of the RF pulse.

公开(公告)号：US07336073B2

公开(公告)日：2008-02-26

申请号：US11559558

申请日：2006-11-14

申请人： Sarah K. Patch ,  Michael R. Hartley ,  James Grant Pipe

发明人： Sarah K. Patch ,  Michael R. Hartley ,  James Grant Pipe

IPC分类号： G01V3/00

CPC分类号： G01R33/561

摘要： The present invention is directed to a method of MR imaging whereby a k-space blade extending through a center of k-space from a subject in motion is acquired. A high-pass convolution of the k-space blade with a reference k-space blade is then determined and converted to a δ function. In-plane motion of the subject during data acquisition of the k-space is then determined from the δ function.

摘要翻译： 本发明涉及一种MR成像方法，其中获取从运动中的被摄体延伸穿过k空间的中心的k空间刀片。 然后确定k空间刀片与参考k空间刀片的高通卷积并转换为增量函数。 然后，从delta函数确定在k空间的数据采集期间的对象的平面内运动。

公开(公告)号：US20100060279A1

公开(公告)日：2010-03-11

申请号：US12619987

申请日：2009-11-17

申请人： James Grant Pipe

发明人： James Grant Pipe

IPC分类号： G01R33/48

CPC分类号： G01R33/54 ,  G01R33/4616 ,  G01R33/56341

摘要： A system and method are provided herein for designing and transmitting RF pulses which cause a reduced off-resonance magnetization transfer saturation. An RF pulse shape may be optimized according to a set of Bloch solutions defining a desired magnetization profile. An RF pulse may be transmitted according to this optimized shape according to a k-space trajectory which traverses a high amplitude portion of the RF pulse more times than one or more low amplitude portions. In addition, a generally alternating slice select gradient may be applied during transmission of the RF pulse.

摘要翻译： 本文提供的系统和方法用于设计和发射导致减小的非共振磁化传递饱和度的RF脉冲。 RF脉冲形状可以根据限定所需磁化分布的Bloch解决方案进行优化。 RF脉冲可以根据该优化的形状根据穿过RF脉冲的高幅度部分的k空间轨迹比一个或多个低振幅部分更多次发送。 此外，可以在RF脉冲的传输期间施加通常交替的切片选择梯度。

公开(公告)号：US20070236216A1

公开(公告)日：2007-10-11

申请号：US11695694

申请日：2007-04-03

申请人： James Grant Pipe

发明人： James Grant Pipe

IPC分类号： G01V3/00

CPC分类号： G01R33/54 ,  G01R33/4616 ,  G01R33/56341

摘要： A system and method are provided herein for designing and transmitting RF pulses which cause a reduced off-resonance magnetization transfer saturation. An RF pulse shape may be optimized according to a set of Bloch solutions defining a desired magnetization profile. An RF pulse may be transmitted according to this optimized shape according to a k-space trajectory which traverses a high amplitude portion of the RF pulse more times than one or more low amplitude portions. In addition, a generally alternating slice select gradient may be applied during transmission of the RF pulse.

摘要翻译： 本文提供的系统和方法用于设计和发射导致减小的非共振磁化传递饱和度的RF脉冲。 RF脉冲形状可以根据限定所需磁化分布的Bloch解决方案进行优化。 RF脉冲可以根据该优化的形状根据穿过RF脉冲的高幅度部分的k空间轨迹比一个或多个低振幅部分更多次发送。 此外，可以在RF脉冲的传输期间施加通常交替的切片选择梯度。

公开(公告)号：US20160061924A1

公开(公告)日：2016-03-03

申请号：US14781659

申请日：2014-04-01

申请人： James Grant PIPE

发明人： James Grant Pipe

IPC分类号： G01R33/565 ,  G06T7/00 ,  G06T11/00 ,  G01R33/48

CPC分类号： G01R33/56509 ,  G01R33/4818 ,  G01R33/4824 ,  G06T7/0012 ,  G06T7/11 ,  G06T11/006 ,  G06T2207/10088

摘要： Described here are systems and methods for estimating bulk rotation and translation of an imaged subject between different blades in a PROPELLER MRI or similar sequence. Correlations between unique pairs of blades are calculated and the relative shift values that maximize the correlation between each pair of blades are identified as relative shift values to be applied for motion correction. Using this method, no reference blade is required, nor does a computationally expensive iterative process need to be performed.

摘要翻译： 这里描述的是用于在PROPELLER MRI或类似序列中估计不同叶片之间的成像对象的体旋转和平移的系统和方法。 计算独特的叶片对之间的相关性，并且将每对叶片之间的相关性最大化的相对偏移值标识为要用于运动校正的相对偏移值。 使用这种方法，不需要参考刀片，也不需要执行计算上昂贵的迭代过程。

公开(公告)号：US20100188085A1

公开(公告)日：2010-07-29

申请号：US12693100

申请日：2010-01-25

申请人： Donglai Huo ,  James Grant Pipe

发明人： Donglai Huo ,  James Grant Pipe

IPC分类号： G01R33/48

CPC分类号： G01R33/5617 ,  G01R33/4824 ,  G01R33/5611 ,  G01R33/56341

摘要： A system and method include a computer readable storage medium having stored thereon a computer program comprising instructions which when executed by a computer cause the computer to apply a first plurality of radio frequency (RF) pulses during a first repetition time (TR) interval of a magnetic resonance (MR) pulse sequence. The instructions also cause the computer to apply a first plurality of gradient pulses and acquire the MR data during application of each gradient pulse of the first plurality of gradient pulses between an adjacent pair of RF pulses of the first plurality of RF pulses. Each gradient pulse of the first plurality of gradient pulses is configured to allow acquisition of MR data for a respective first bladelet passing through a center of k-space, wherein the first bladelets are non-parallel with each other. The instructions also cause the computer to reconstruct the acquired MR data into an image.

摘要翻译： 一种系统和方法包括其上存储有计算机程序的计算机可读存储介质，所述计算机程序包括当计算机执行时使计算机在第一重复时间（TR）间隔期间施加第一多个射频（RF）脉冲的指令， 磁共振（MR）脉冲序列。 所述指令还使得所述计算机在所述第一多个RF脉冲的相邻的一对RF脉冲之间的所述第一多个梯度脉冲的每个梯度脉冲的应用期间，施加第一多个梯度脉冲并获取MR数据。 第一多个梯度脉冲的每个梯度脉冲被配置为允许获取通过k空间的中心的相应的第一叶片的MR数据，其中第一叶片彼此不平行。 指令还使计算机将所获取的MR数据重构成图像。

公开(公告)号：US07635977B2

公开(公告)日：2009-12-22

申请号：US11695694

申请日：2007-04-03

申请人： James Grant Pipe

发明人： James Grant Pipe

IPC分类号： G01V3/00

CPC分类号： G01R33/54 ,  G01R33/4616 ,  G01R33/56341

摘要： A system and method are provided herein for designing and transmitting RF pulses which cause a reduced off-resonance magnetization transfer saturation. An RF pulse shape may be optimized according to a set of Bloch solutions defining a desired magnetization profile. An RF pulse may be transmitted according to this optimized shape according to a k-space trajectory which traverses a high amplitude portion of the RF pulse more times than one or more low amplitude portions. In addition, a generally alternating slice select gradient may be applied during transmission of the RF pulse.

摘要翻译： 本文提供的系统和方法用于设计和发射导致减小的非共振磁化传递饱和度的RF脉冲。 RF脉冲形状可以根据限定所需磁化分布的Bloch解决方案进行优化。 RF脉冲可以根据该优化的形状根据穿过RF脉冲的高幅度部分的k空间轨迹比一个或多个低振幅部分更多次发送。 此外，可以在RF脉冲的传输期间施加通常交替的切片选择梯度。

公开(公告)号：US09933505B2

公开(公告)日：2018-04-03

申请号：US14781659

申请日：2014-04-01

申请人： James Grant Pipe

发明人： James Grant Pipe

IPC分类号： G01R33/565 ,  G06T11/00 ,  G01R33/48 ,  G06T7/00 ,  G06T7/11

CPC分类号： G01R33/56509 ,  G01R33/4818 ,  G01R33/4824 ,  G06T7/0012 ,  G06T7/11 ,  G06T11/006 ,  G06T2207/10088

摘要： Described here are systems and methods for estimating bulk rotation and translation of an imaged subject between different blades in a PROPELLER MRI or similar sequence. Correlations between unique pairs of blades are calculated and the relative shift values that maximize the correlation between each pair of blades are identified as relative shift values to be applied for motion correction. Using this method, no reference blade is required, nor does a computationally expensive iterative process need to be performed.

公开(公告)号：US08022702B2

公开(公告)日：2011-09-20

申请号：US12620037

申请日：2009-11-17

申请人： James Grant Pipe

发明人： James Grant Pipe

IPC分类号： G01V3/00

CPC分类号： G01R33/54 ,  G01R33/4616 ,  G01R33/56341

摘要： A system and method are provided herein for designing and transmitting RF pulses which cause a reduced off-resonance magnetization transfer saturation. An RF pulse shape may be optimized according to a set of Bloch solutions defining a desired magnetization profile. An RF pulse may be transmitted according to this optimized shape according to a k-space trajectory which traverses a high amplitude portion of the RF pulse more times than one or more low amplitude portions. In addition, a generally alternating slice select gradient may be applied during transmission of the RF pulse.

摘要翻译： 本文提供的系统和方法用于设计和发射导致减小的非共振磁化传递饱和度的RF脉冲。 RF脉冲形状可以根据限定所需磁化分布的Bloch解决方案进行优化。 RF脉冲可以根据该优化的形状根据穿过RF脉冲的高幅度部分的k空间轨迹比一个或多个低振幅部分更多次发送。 此外，可以在RF脉冲的传输期间施加通常交替的切片选择梯度。