公开(公告)号：US20160307301A1

公开(公告)日：2016-10-20

申请号：US15097530

申请日：2016-04-13

申请人： The Board of Trustees of The University of Illinois

发明人： Xiaohong Joe Zhou ,  Yi Sui

IPC分类号： G06T5/00 ,  G06T7/00

CPC分类号： G01R33/4836 ,  G01R33/5602 ,  G01R33/5608 ,  G01R33/5616

摘要： Representative methods and systems are disclosed for reducing image distortion or increasing spatial resolution in echo planar magnetic resonance imaging. In representative embodiments, a targeted field of view (FOV) image is divided into segments, with each segment having a predetermined overlap region with an adjacent segment, such as in a phase-encoding direction. Image data is acquired for each segment, sequentially or simultaneously, using a reduced phase-encoding FOV with a 2D radiofrequency (RF) excitation pulse, and rotated and scaled magnetic field gradients. The 2D RF excitation pulse may also be modulated, such as onto a plurality of different carrier frequencies, for simultaneous acquisition of multiple segments in the same imaging plane. Using the spatial response of the 2D RF excitation pulse, the acquired image data for each segment of the plurality of segments is combined to generate a combined magnetic resonance image having the targeted field of view.

摘要翻译： 公开了用于减少图像失真或增加回波平面磁共振成像中的空间分辨率的代表性方法和系统。 在代表性实施例中，目标视场（FOV）图像被划分成段，其中每个段具有与相邻段（例如在相位编码方向）上的预定重叠区域。 使用具有2D射频（RF）激励脉冲的减少相位编码的FOV以及旋转和缩放的磁场梯度，对于每个段，顺序地或同时地获取图像数据。 2D RF激励脉冲也可以被调制，例如到多个不同的载波频率上，以便在同一成像平面中同时采集多个段。 使用2D RF激励脉冲的空间响应，将所获取的多个段的每个段的图像数据组合以产生具有目标视场的组合磁共振图像。

公开(公告)号：US12000917B2

公开(公告)日：2024-06-04

申请号：US17423729

申请日：2020-01-21

申请人： The Board of Trustees of the University of Illinois

发明人： Xiaohong Joe Zhou ,  Zheng Zhong ,  Meryem Muge Karaman

IPC分类号： G01V3/00 ,  G01R33/48 ,  G01R33/56 ,  G01R33/561 ,  G01R33/567 ,  G06F7/58 ,  H04L9/06 ,  H04L9/32 ,  H04L9/00

CPC分类号： G01R33/4824 ,  G01R33/5608 ,  G01R33/5611 ,  G01R33/5616 ,  G01R33/5673 ,  G06F7/588 ,  H04L9/0662 ,  H04L9/3239 ,  H04L9/3247 ,  H04L9/50

摘要： A system and method for producing a series of time-resolved magnetic resonance (MR) images is set forth. The system can perform method steps of encoding spatial information into an MRI signal by manipulating a phase of the MRI signal within an MRI system, generating and outputting a phase-encoded MRI signal over time by digitizing a plurality of time points in the MRI signal, repeating the generating and outputting step for a plurality of phase-encoded signals, each phase-encoded signal in synchrony with a trigger, producing a plurality of digitized time points, and reconstructing a series of time resolved MR images, each image of the series of MR images at one specific time point selected from the plurality of digitized time points for each phase-encoded step. Each image in the series of time-resolved MR images corresponding to a specific time point in a cyclic event.

公开(公告)号：US09797970B2

公开(公告)日：2017-10-24

申请号：US15097530

申请日：2016-04-13

申请人： The Board of Trustees of The University of Illinois

发明人： Xiaohong Joe Zhou ,  Yi Sui

IPC分类号： G06K9/00 ,  G01R33/483 ,  G01R33/56 ,  G01R33/561

CPC分类号： G01R33/4836 ,  G01R33/5602 ,  G01R33/5608 ,  G01R33/5616

摘要： Representative methods and systems are disclosed for reducing image distortion or increasing spatial resolution in echo planar magnetic resonance imaging. In representative embodiments, a targeted field of view (FOV) image is divided into segments, with each segment having a predetermined overlap region with an adjacent segment, such as in a phase-encoding direction. Image data is acquired for each segment, sequentially or simultaneously, using a reduced phase-encoding FOV with a 2D radiofrequency (RF) excitation pulse, and rotated and scaled magnetic field gradients. The 2D RF excitation pulse may also be modulated, such as onto a plurality of different carrier frequencies, for simultaneous acquisition of multiple segments in the same imaging plane. Using the spatial response of the 2D RF excitation pulse, the acquired image data for each segment of the plurality of segments is combined to generate a combined magnetic resonance image having the targeted field of view.

公开(公告)号：US20240295620A1

公开(公告)日：2024-09-05

申请号：US18573518

申请日：2022-06-27

申请人： THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS

发明人： Xiaohong Joe Zhou ,  Kaibao Sun

IPC分类号： G01R33/483 ,  G01R33/48 ,  G01R33/561 ,  G01R33/563

CPC分类号： G01R33/4835 ,  G01R33/4806 ,  G01R33/4822 ,  G01R33/4836 ,  G01R33/5611 ,  G01R33/5616 ,  G01R33/56341

摘要： The present disclosure provides technologies that allow reduced field of view or fast imaging with reduced image distortion. The first technique capitalizes on the benefit of reduced field of view imaging for full field of view coverage. The second technique allows achieves high resolution 3D images in a focused region. These techniques are expected to have applications for cancer imaging, neuro imaging, and other biomedical imaging areas.