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1. 发明授权

US09316711B2 System and method for accelerated magnetic resonance imaging using spectral sensitivity 有权
标题翻译：使用光谱灵敏度加速磁共振成像的系统和方法
公开(公告)号：US09316711B2
公开(公告)日：2016-04-19
申请号：US13568511
申请日：2012-08-07
申请人： Scott B Reeder , Matthew R Smith , Nathan S Artz
发明人： Scott B Reeder , Matthew R Smith , Nathan S Artz
IPC分类号： G01R33/561 , G01R33/44
CPC分类号： G01R33/445 , G01R33/561
摘要： A system and method for accelerated magnetic resonance imaging (MRI) using spectral sensitivity information are provided. The MRI system is used to acquire k-space data from a subject that when positioned in the main magnetic field of the MRI system causes inhomogeneities in the main magnetic field. Spectral sensitivity information is derived from the acquired k-space data. In general, the spectral sensitivity information relates specific resonance frequencies to distinct spatial locations in the main magnetic field of the MRI system. One or more images of the subject may be reconstructed from the acquired k-space data using the produced spectral sensitivity information to spatially encode the acquired k-space data. By using the spectral sensitivity information to provide spatial-encoding, the data acquisition can be accelerated, for example, by undersampling k-space. In addition, using the provided system and method, clinically viable images can be obtained in the presence of severe off-resonance.
摘要翻译：提供了使用光谱灵敏度信息的用于加速磁共振成像（MRI）的系统和方法。 MRI系统用于从受检者获取k空间数据，当位于MRI系统的主磁场中时，会导致主磁场的不均匀性。光谱灵敏度信息是从所获取的k空间数据导出的。通常，光谱灵敏度信息将特定共振频率与MRI系统的主磁场中的不同空间位置相关联。可以使用所产生的光谱灵敏度信息，从所获取的k空间数据中重构对象的一个或多个图像，以对所获取的k空间数据进行空间编码。通过使用光谱灵敏度信息来提供空间编码，可以例如通过对k空间进行欠采样来加速数据采集。另外，使用提供的系统和方法，可以在存在严重的非共振的情况下获得临床上可行的图像。

2. 发明授权

US08957681B2 System and method for magnetic resonance imaging water-fat separation with full dynamic range using in-phase images 有权
标题翻译：使用同相图像的全动态范围的磁共振成像水脂分离系统和方法
公开(公告)号：US08957681B2
公开(公告)日：2015-02-17
申请号：US13400343
申请日：2012-02-20
申请人： Diego Hernando , Scott B Reeder
发明人： Diego Hernando , Scott B Reeder
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/5615
摘要： A magnetic resonance imaging (“MRI”) system and method for producing an image of a subject with the MRI system in which signal contributions of water and fat are separated are provided. A plurality of in-phase echoes formed at a plurality of different echo times are sampled to acquire k-space data. The in-phase echoes include signal contributions from water and fat that are in-phase with each other. The signal contributions from water and fat are then separated by fitting only those echo signals that are in-phase echo signals to a signal model that models a fat spectrum as including multiple resonance peaks. From these signal contributions, an image of the subject depicting a desired amount of signal contribution from water and a desired amount of signal contribution is produced.
摘要翻译：提供了一种磁共振成像（“MRI”）系统和用于产生具有分离了水分和脂肪的信号贡献的MRI系统的受试者的图像的方法。在多个不同回波时间形成的多个同相回波被采样以获取k空间数据。同相回波包括彼此同相的来自水和脂肪的信号贡献。然后通过仅将那些作为同相回波信号的回波信号与仅将脂肪谱模拟成包含多个共振峰的信号模型分离，从而分离水和脂肪的信号。根据这些信号贡献，产生描绘从水中所需量的信号贡献和所需量的信号贡献的被摄体的图像。

3. 发明授权

US08373415B2 Method for separating magnetic resonance imaging signals using spectral distinction of species 有权
标题翻译：使用物种的光谱区分分离磁共振成像信号的方法
公开(公告)号：US08373415B2
公开(公告)日：2013-02-12
申请号：US12761231
申请日：2010-04-15
申请人： Scott B Reeder , Huanzhou Yu
发明人： Scott B Reeder , Huanzhou Yu
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/5615 , G01R33/56563
摘要： A method for producing an image of a subject with a magnetic resonance imaging (MRI) system in which a signal contribution of a chemical species is depicted and a signal contribution of another chemical species is substantially separated is provided. For example, the provided method is applicable for water-fat separation. Spectral differences between at least two different chemical species are exploited to produce a weighting map that depicts the likelihood that one chemical species being depicted as another. A weighting map that characterizes the smoothness of a field map variation is also produced. These weighting maps are utilized to produce a correct field map estimate, such that a robust separation of the signal contributions of the at least two chemical species can be performed.
摘要翻译：提供了一种利用其中描绘了化学物质的信号贡献并且另一种化学物质的信号贡献基本上分离的磁共振成像（MRI）系统来产生受试者的图像的方法。例如，所提供的方法适用于水脂分离。利用至少两种不同化学物质之间的光谱差异来产生加权图，其描绘了一种化学物种被描绘为另一种的可能性。还产生了表征场映射变化的平滑度的权重映射。这些加权图用于产生正确的场映射估计，使得可以执行至少两种化学物质的信号贡献的鲁棒分离。

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