公开(公告)号：US20150042329A1

公开(公告)日：2015-02-12

申请号：US13961711

申请日：2013-08-07

申请人： The Board of Trustees of the Leland Stanford Junior University

发明人： Tao ZHANG ,  Joseph Y. CHENG ,  John M. PAULY ,  Michael LUSTIG ,  Shreyas S. VASANAWALA

IPC分类号： G01R33/56

CPC分类号： G01R33/5611 ,  G01R33/56308

摘要： A method of providing dynamic magnetic resonance imaging (MRI) of an object in an MRI system is provided. A magnetic resonance excitation from the MRI system is applied to the object. A magnetic resonance signal is read out through k-space for a plurality of regions with two or three spatial dimensions and a temporal dimension, wherein the read out is pseudo-randomly undersampled in the spatial frequency dimensions and the temporal dimension providing k-space data that is pseudo-randomly undersampled in the spatial frequency dimensions and the temporal dimension. The readout data is used to create a sequential series of spatial frequency data sets by generating interpolated data in the spatial frequency dimensions and the temporal dimension. The sequential series of spatial frequency data sets is used to create temporally resolved spatial images.

摘要翻译： 提供了一种在MRI系统中提供物体的动态磁共振成像（MRI）的方法。 来自MRI系统的磁共振激励被应用于物体。 通过k空间读出具有两个或三个空间维度和时间维度的多个区域的磁共振信号，其中读出在空间频率维度中伪随机欠采样，并且提供k空间数据的时间维度 这是在空间频率维度和时间维度上伪随机欠采样的。 读出数据用于通过在空间频率维度和时间维度上产生内插数据来创建空间频率数据集的连续序列。 空间频率数据集的顺序系列用于创建时间分辨的空间图像。

公开(公告)号：US20160349346A1

公开(公告)日：2016-12-01

申请号：US14721876

申请日：2015-05-26

申请人： The Board of Trustees of the Leland Stanford Junior University

发明人： Joseph Y. CHENG ,  John M. PAULY ,  Marcus T. ALLEY ,  Shreyas S. VASANAWALA ,  Michael LUSTIG

IPC分类号： G01R33/565 ,  G01R33/48 ,  G01R33/567 ,  G01R33/563

CPC分类号： G01R33/56509 ,  G01R33/4822 ,  G01R33/56316 ,  G01R33/5676

摘要： A method for an object in a magnetic resonance image (MRI) system for providing at least one velocity indicative magnetic resonance image (MRI) with motion correction of the object is provided. Velocity encoding gradients in at least one spatial direction are provided from the MRI system. Spatial frequency data resulting from the encoding gradients are acquired through the MRI system. Image signals are provided by the MRI system. Image data resulting from the image signals are acquired through the MRI system. At least one motion corrected and velocity indicative magnetic resonance image is created from the acquired spatial frequency data and image data.

摘要翻译： 提供了一种用于提供具有对象的运动校正的至少一个速度指示性磁共振图像（MRI）的磁共振图像（MRI）系统中的对象的方法。 从MRI系统提供至少一个空间方向的速度编码梯度。 通过MRI系统获取由编码梯度产生的空间频率数据。 图像信号由MRI系统提供。 通过MRI系统获取由图像信号产生的图像数据。 从所获取的空间频率数据和图像数据创建至少一个运动校正和速度指示性磁共振图像。

公开(公告)号：US20140210469A1

公开(公告)日：2014-07-31

申请号：US14168288

申请日：2014-01-30

申请人： The Regents of the University of California ,  The Board of Trustees of the Leland Stanford Junior University

发明人： Joseph Y. CHENG ,  John M. PAULY ,  Michael LUSTIG ,  Shreyas S. VASANAWALA

IPC分类号： G01R33/565

CPC分类号： G01R33/56509

摘要： A method for providing an magnetic resonance imaging (MRI) with nonrigid motion correction of an object is provided. An MRI excitation is applied to the object. A magnetic field read out from the object using a plurality of sensor coils. Spatially localized motion estimates are obtained for each sensor coil of the plurality of sensor coils. The motion estimates are used for each sensor coil to provide motion correction.

摘要翻译： 提供了一种用于提供具有物体的非刚性运动校正的磁共振成像（MRI）的方法。 MRI激励被施加到对象。 使用多个传感器线圈从物体读出磁场。 对于多个传感器线圈的每个传感器线圈获得空间局部的运动估计。 运动估计用于每个传感器线圈以提供运动校正。

公开(公告)号：US20170234952A1

公开(公告)日：2017-08-17

申请号：US15352420

申请日：2016-11-15

申请人： The Board of Trustees of the Leland Stanford Junior University

发明人： Tao ZHANG ,  Yuxin CHEN ,  John M. PAULY ,  Shreyas S. VASANAWALA

IPC分类号： G01R33/48 ,  G01R33/561 ,  G01R33/56

CPC分类号： G01R33/4828 ,  G01R33/5601 ,  G01R33/5611 ,  G01R33/56308 ,  G01R33/56325

摘要： A method for creating a first MRI image and a second MRI image is provided. A first echo is read out. A second echo is read out. The first echo readout is used to generate a first image set, with each image pixel being a first linear combination of the first species and the second species. The second echo readout is used to generate a second image set, with each image pixel being a second linear combination of the first species and the second species. The first image set and second image set are combined to obtain a first combined image containing only the first species and a second combined image containing only the second species, comprising combining the first image set and the second image set to generate two pairs of solutions and using a mathematical optimization to choose a correct pair of solutions.

公开(公告)号：US20170146627A1

公开(公告)日：2017-05-25

申请号：US14947867

申请日：2015-11-20

申请人： The Board of Trustees of the Leland Stanford Junior University

发明人： Joseph Y. CHENG ,  Tao ZHANG ,  John M. PAULY ,  Shreyas S. VASANAWALA

IPC分类号： G01R33/563 ,  G01R33/56 ,  A61B5/026 ,  A61B5/055 ,  A61B5/00

CPC分类号： G01R33/56316 ,  A61B5/0263 ,  A61B5/055 ,  A61B5/7425 ,  G01R33/5601 ,  G01R33/561

摘要： A method for providing magnetic resonance imaging with dynamic contrast and 4D flow of a volume of an object in a magnetic resonance imaging (MRI) system is provided. Contrast agent is provided to the volume of the object. Magnetic resonance excitation from the MRI system is applied to the volume of the object. The MRI system reads out a subsample of less than 10% of spatially resolved data and velocity encoded data with respect to time. The readout subsample is used to determine both dynamic contrast and 4D flow.