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公开(公告)号：US11415655B2
公开(公告)日：2022-08-16
申请号：US15606882
申请日：2017-05-26
Inventor： Michael Salerno , Yang Yang , Li Zhao , Xiao Chen
IPC: G01R33/56 , A61B5/026 , A61B5/00 , G01R33/563 , G01R33/483 , G01R33/48 , G01R33/567
Abstract: Some aspects of the present disclosure relate a method for magnetic resonance imaging, which can include acquiring, by applying an imaging pulse sequence, magnetic resonance data associated with a region of interest of a subject. The imaging pulse sequence can include a plurality of RF pulses configured to generate a desired image contrast, and an outer-volume suppression (OVS) module to attenuate the signal outside the region of interest. The method can further include reconstructing, from the acquired magnetic resonance data, a plurality of reduced field of view (rFOV) magnetic resonance images corresponding to the region of interest.
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公开(公告)号：US10722137B2
公开(公告)日：2020-07-28
申请号：US14677915
申请日：2015-04-02
Applicant: University of Virginia Patent Foundation , The Board of Trustees of the Leland Stanford Junior University
Inventor： Samuel Fielden , Li Zhao , Wilson Miller , Xue Feng , Max Wintermark , Kim Butts Pauly , Craig H. Meyer
Abstract: Aspects of the present disclosure relate to magnetic resonance thermometry. In one embodiment, a method includes acquiring undersampled magnetic resonance data associated with an area of interest of a subject receiving focused ultrasound treatment, and reconstructing images corresponding to the area of interest based on the acquired magnetic resonance data, where the reconstructing uses Kalman filtering.
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3.发明授权Systems and methods for accelerated arterial spin labeling using compressed sensing 有权使用压缩感应加速动脉自旋标记的系统和方法公开(公告)号：US09589345B2
公开(公告)日：2017-03-07
申请号：US14870803
申请日：2015-09-30
Applicant: UNIVERSITY OF VIRGINIA PATENT FOUNDATION
Inventor： Li Zhao , Xiao Chen , Samuel W. Fielden , Frederick H. Epstein , John P. Mugler, III , Manal Nicolas-Jilwan , Max Wintermark , Craig H. Meyer
IPC: G06K9/00 , G06T7/00 , G01R33/563 , G01R33/48 , G06K9/62 , G06T11/00 , A61B5/05 , G01R33/561
CPC classification number: G06T7/0012 , G01R33/4824 , G01R33/5611 , G01R33/56366 , G06K9/6232 , G06T11/005 , G06T2207/10088 , G06T2207/30104 , G06T2211/412 , G06T2211/424
Abstract: Systems and methods for accelerated arterial spin labeling (ASL) using compressed sensing are disclosed. In one aspect, in accordance with one example embodiment, a method includes acquiring magnetic resonance data associated with an area of interest of a subject, wherein the area of interest corresponds to one or more physiological activities of the subject. The method also includes performing image reconstruction using temporally constrained compressed sensing reconstruction on at least a portion of the acquired magnetic resonance data, wherein acquiring the magnetic resonance data includes receiving data associated with ASL of the area of interest of the subject.
Abstract translation: 公开了使用压缩感测加速动脉自旋标记（ASL）的系统和方法。 在一个方面，根据一个示例性实施例，一种方法包括获取与受试者的感兴趣区域相关联的磁共振数据，其中感兴趣区域对应于受试者的一个或多个生理活动。 该方法还包括在所获取的磁共振数据的至少一部分上使用时间上受限的压缩感测重构来执行图像重建，其中获取磁共振数据包括接收与被摄体的感兴趣区域的ASL相关联的数据。
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4.发明申请RAPID 3D DYNAMIC ARTERIAL SPIN LABELING WITH A SPARSE MODEL-BASED IMAGE RECONSTRUCTION 审中-公开基于模型的图像重建的快速3D动态文字旋转标签公开(公告)号：US20170035319A1
公开(公告)日：2017-02-09
申请号：US15227825
申请日：2016-08-03
Inventor： Li Zhao , Craig Meyer
CPC classification number: A61B5/055 , A61B5/0042 , A61B5/0263 , G01R33/4826 , G01R33/5611 , G01R33/56366 , G06K2209/05
Abstract: Methods, systems, and computer-readable media for rapid 3D dynamic arterial spin labeling with a sparse model-based image reconstruction are disclosed. In one embodiment, a method includes acquiring magnetic resonance data associated with an area of interest of a subject. The magnetic resonance data includes associated with arterial spin labeling (ASL) of the area of interest. The method also includes performing image reconstruction on the acquired resonance data. The image reconstruction includes compressed sensing enforcing a model-based sparsity constraint, where the model-based sparsity constraint is based on an ASL signal prototype dictionary.
Abstract translation: 公开了用于基于稀疏模型的图像重建的用于快速3D动态动脉自旋标记的方法，系统和计算机可读介质。 在一个实施例中，一种方法包括获取与受试者的感兴趣区域相关联的磁共振数据。 磁共振数据包括与感兴趣区域的动脉自旋标记（ASL）相关联。 该方法还包括对获取的共振数据执行图像重构。 图像重构包括强制基于模型的稀疏约束的压缩感知，其中基于模型的稀疏约束基于ASL信号原型字典。
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公开(公告)号：US20160098835A1
公开(公告)日：2016-04-07
申请号：US14870803
申请日：2015-09-30
Applicant: UNIVERSITY OF VIRGINIA PATENT FOUNDATION
Inventor： Li Zhao , Xiao Chen , Samuel W. Fielden , Frederick H. Epstein , John P. Mugler, III , Manal Nicolas-Jilwan , Max Wintermark , Craig H. Meyer
IPC: G06T7/00 , G01R33/48 , G01R33/563 , G06T11/00 , G06K9/62
CPC classification number: G06T7/0012 , G01R33/4824 , G01R33/5611 , G01R33/56366 , G06K9/6232 , G06T11/005 , G06T2207/10088 , G06T2207/30104 , G06T2211/412 , G06T2211/424
Abstract: Systems and methods for accelerated arterial spin labeling (ASL) using compressed sensing are disclosed. In one aspect, in accordance with one example embodiment, a method includes acquiring magnetic resonance data associated with an area of interest of a subject, wherein the area of interest corresponds to one or more physiological activities of the subject. The method also includes performing image reconstruction using temporally constrained compressed sensing reconstruction on at least a portion of the acquired magnetic resonance data, wherein acquiring the magnetic resonance data includes receiving data associated with ASL of the area of interest of the subject.
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Patent Agency Ranking
6.发明申请SYSTEMS AND METHODS FOR IMAGE RECONSTRUCTION USING VARIABLE-DENSITY SPIRAL TRAJECTORY 有权使用可变密度螺旋纹理进行图像重建的系统和方法公开(公告)号：US20150316630A1
公开(公告)日：2015-11-05
申请号：US14677877
申请日：2015-04-02
Applicant: University of Virginia Patent Foundation
Inventor： Li Zhao , Craig H. Meyer
IPC: G01R33/48
CPC classification number: G01R33/5611 , G01R33/4818 , G01R33/4824
Abstract: Some aspects of the present disclosure relate image reconstruction using a variable-density spiral trajectory. An exemplary method for image reconstruction includes acquiring MR data, which includes determining a multi-level undersampling pattern based on sampling distance and probability functions, and determining a desired variable-density spiral trajectory based on the undersampling pattern. Acquiring the MR data also includes generating spiral gradient waveforms based on the desired trajectory, and tracing a variable-density spiral trajectory using the spiral gradient waveforms. After tracing, the MR data can be sub-sampled based on the variable-density spiral trajectory. The method also includes reconstructing one or more images based on the acquired MR data.
Abstract translation: 本公开的一些方面涉及使用可变密度螺旋轨迹的图像重建。 用于图像重建的示例性方法包括获取MR数据，其包括基于采样距离和概率函数来确定多级欠采样模式，以及基于所述欠采样模式来确定期望的可变密度螺旋轨迹。 获取MR数据还包括基于期望的轨迹生成螺旋梯度波形，以及使用螺旋梯度波形跟踪可变密度螺旋轨迹。 跟踪后，MR数据可以基于可变密度螺旋轨迹进行子采样。 该方法还包括基于获取的MR数据重建一个或多个图像。
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公开(公告)号：US10561337B2
公开(公告)日：2020-02-18
申请号：US15227825
申请日：2016-08-03
Applicant: University of Virginia Patent Foundation
Inventor： Li Zhao , Craig Meyer
IPC: A61B5/055 , A61B5/026 , A61B5/00 , G01R33/563 , G01R33/561 , G01R33/48
Abstract: Methods, systems, and computer-readable media for rapid 3D dynamic arterial spin labeling with a sparse model-based image reconstruction are disclosed. In one embodiment, a method includes acquiring magnetic resonance data associated with an area of interest of a subject. The magnetic resonance data includes associated with arterial spin labeling (ASL) of the area of interest. The method also includes performing image reconstruction on the acquired resonance data. The image reconstruction includes compressed sensing enforcing a model-based sparsity constraint, where the model-based sparsity constraint is based on an ASL signal prototype dictionary.
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公开(公告)号：US20170343635A1
公开(公告)日：2017-11-30
申请号：US15606882
申请日：2017-05-26
Inventor： Michael Salerno , Yang Yang , Li Zhao , Xiao Chen
CPC classification number: G01R33/5601 , A61B5/0013 , A61B5/0044 , A61B5/0263 , A61B2576/023 , G01R33/4826 , G01R33/4838 , G01R33/5602 , G01R33/56366 , G01R33/5673
Abstract: Some aspects of the present disclosure relate a method for magnetic resonance imaging, which can include acquiring, by applying an imaging pulse sequence, magnetic resonance data associated with a region of interest of a subject. The imaging pulse sequence can include a plurality of RF pulses configured to generate a desired image contrast, and an outer-volume suppression (OVS) module to attenuate the signal outside the region of interest. The method can further include reconstructing, from the acquired magnetic resonance data, a plurality of reduced field of view (rFOV) magnetic resonance images corresponding to the region of interest.
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9.发明申请公开(公告)号：US20150282719A1
公开(公告)日：2015-10-08
申请号：US14677891
申请日：2015-04-02
Applicant: University of Virginia Patent Foundation
Inventor： Samuel Fielden , Li Zhao , Max Wintermark , Craig H. Meyer
CPC classification number: A61B5/0263 , A61B5/0042 , A61B5/055 , A61B6/5229 , A61B2576/026
Abstract: Aspects of the present disclosure relate to systems and methods for medical imaging that incorporate prior knowledge. Some aspects relate to incorporating prior knowledge using a non-local means filter. Some aspects relate to incorporating prior knowledge for improved perfusion imaging, such as those incorporating arterial spin labeling.
Abstract translation: 本公开的方面涉及包含先前知识的用于医学成像的系统和方法。 一些方面涉及使用非本地平均值过滤器来结合先验知识。 一些方面涉及结合用于改善灌注成像的现有知识，例如并入动脉自旋标记的那些。
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公开(公告)号：US11647915B2
公开(公告)日：2023-05-16
申请号：US14677891
申请日：2015-04-02
Applicant: University of Virginia Patent Foundation
Inventor： Samuel Fielden , Li Zhao , Max Wintermark , Craig H. Meyer
CPC classification number: A61B5/0263 , A61B5/0042 , A61B5/055 , A61B6/5229 , A61B2576/026
Abstract: Aspects of the present disclosure relate to systems and methods for medical imaging that incorporate prior knowledge. Some aspects relate to incorporating prior knowledge using a non-local means filter. Some aspects relate to incorporating prior knowledge for improved perfusion imaging, such as those incorporating arterial spin labeling.
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