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1.发明授权Self-calibration methods for parallel imaging and multipoint water-fat separation methods 有权用于平行成像和多点水脂分离方法的自校准方法公开(公告)号：US07486074B2
公开(公告)日：2009-02-03
申请号：US11738340
申请日：2007-04-20
申请人： Charles A. McKenzie , Anja Brau , Huanzhou Yu , Scott B. Reeder , Jean H. Brittain , Ann Shimakawa
发明人： Charles A. McKenzie , Anja Brau , Huanzhou Yu , Scott B. Reeder , Jean H. Brittain , Ann Shimakawa
IPC分类号： G01V3/00
CPC分类号： G01R33/5611 , G01R33/4828 , G01R33/5607
摘要： A method for generating a self-calibrating parallel multiecho magnetic resonance image is provided. A magnetic resonance imaging excitation is applied. A first echo at a first echo time in a first pattern is acquired. A second echo at a second echo time different from the first echo phase in a second pattern different from the first pattern is acquired. The acquired first echo and acquired second echo are used to generate an image in an image pattern, wherein none of the acquired echoes for generating the image have the same pattern as the image pattern.
摘要翻译： 提供了一种用于产生自校准并联多环磁共振图像的方法。 应用磁共振成像激励。 获取第一模式中的第一回波时间的第一回波。 在与第一图案不同的第二图案中与第一回波相位不同的第二回波时间获得第二回波。 获取的第一回波和获取的第二回波用于产生图像图案中的图像，其中用于生成图像的所获取的回波都不具有与图像图案相同的图案。
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2.发明授权Sliding window reconstruction and phase/field map updating for dynamic chemical shift imaging 有权动态化学位移成像的滑动窗口重建和相位/场地图更新公开(公告)号：US07486073B2
公开(公告)日：2009-02-03
申请号：US11738347
申请日：2007-04-20
IPC分类号： G01V3/00
CPC分类号： G01R33/5617 , G01R33/4828
摘要： A method for generating dynamic magnetic resonance images is provided. A cyclical magnetic resonance imaging excitation is applied for a plurality of cycles at a cycle rate. A plurality of magnetic resonance image echoes is acquired for each cycle. A plurality of frames of images is generated from the acquired plurality of magnetic resonance echoes at a frame rate that is at least twice the cycle rate, wherein each frame of the plurality of frames is generated from a plurality of echoes and wherein some of the plurality of frames are generated from magnetic resonance image echoes of adjacent cycles.
摘要翻译： 提供了一种用于产生动态磁共振图像的方法。 周期磁共振成像激励以循环速率施加多个周期。 对于每个周期获取多个磁共振图像回波。 从所获取的多个磁共振回波以至少为循环速率的两倍的帧速率产生多个图像帧，其中，多个帧中的每个帧由多个回波生成，并且其中多个帧中的一些 的帧由相邻周期的磁共振图像回波产生。
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公开(公告)号：US07592810B2
公开(公告)日：2009-09-22
申请号：US11738339
申请日：2007-04-20
IPC分类号： G01V3/00
CPC分类号： G01R33/4828
摘要： A method for generating a magnetic resonance images is provided. A first species signal for a first species is generated from magnetic resonance data. A second signal is generated from the magnetic resonance data. The first species signal is combined with the second signal to provide a recombined image. The recombined image may be displayed.
摘要翻译： 提供了一种用于产生磁共振图像的方法。 从磁共振数据产生第一物种的第一物种信号。 从磁共振数据产生第二信号。 第一物种信号与第二信号组合以提供重组图像。 可以显示重新组合的图像。
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4.发明授权Maximum likelihood estimator in the presence of non-identically distributed noise for decomposition of chemical species in MRI 有权在存在不均匀分布的噪声用于MRI中化学物质分解的情况下的最大似然估计量公开(公告)号：US07592807B2
公开(公告)日：2009-09-22
申请号：US11738343
申请日：2007-04-20
IPC分类号： G01V3/00
CPC分类号： G01R33/5611 , G01R33/4828 , G01R33/5608 , G01R33/5615
摘要： A method of separating signals from at least two species in a body using echo-coherent time magnetic resonance imaging is provided. A plurality of echo signals is acquired at acquisition times optimized based on the noise properties of images with different variance with possibly correlated noise resulting in possibly asymmetrically positioned images with respect to an echo time. The plurality of echo signals is combined iteratively by using a maximum likelihood decomposition algorithm for non-identically distributed noise.
摘要翻译： 提供了使用回波相干时间磁共振成像从身体中的至少两个物种分离信号的方法。 在基于具有不同方差的图像的噪声属性优化的采集时间获取多个回波信号，可能的相关噪声导致相对于回波时间可能不对称地定位的图像。 通过使用用于非相同分布的噪声的最大似然分解算法来迭代地组合多个回波信号。
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5.发明授权公开(公告)号：US07468605B2
公开(公告)日：2008-12-23
申请号：US11738350
申请日：2007-04-20
IPC分类号： G01V3/00
CPC分类号： G01N24/08 , G01R33/4828 , G01R33/50
摘要： A method for generating a magnetic resonance image is provided. A magnetic resonance imaging excitation is applied for a plurality of cycles at a cycle rate. A plurality of magnetic resonance image echoes is acquired for each cycle. A decay map is estimated from the plurality of magnetic resonance image echoes for each cycle. The estimated decay map is used to generate an image for at least two different species.
摘要翻译： 提供了一种用于产生磁共振图像的方法。 磁共振成像激励以循环速率施加多个周期。 对于每个周期获取多个磁共振图像回波。 对于每个周期，从多个磁共振图像回波估计衰减图。 估计的衰减图用于生成至少两种不同物种的图像。
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6.发明授权公开(公告)号：US07741842B2
公开(公告)日：2010-06-22
申请号：US11738352
申请日：2007-04-20
IPC分类号： G01V3/00
CPC分类号： G01R33/5611 , G01R33/5616 , G01R33/5617 , G01R33/56527
摘要： A method for generating a calibrated parallel magnetic resonance image is provided in a manifestation of the invention. A magnetic resonance imaging excitation is applied. A plurality of echoes at different echo times (TE) is acquired. The acquired plurality of echoes from different echo times is used to create a chemical shift corrected calibration map.
摘要翻译： 在本发明的表现中提供了用于产生校准的并联磁共振图像的方法。 应用磁共振成像激励。 获取不同回波时间（TE）的多个回波。 使用从不同回波时间获取的多个回波来创建化学位移校正校准图。
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7.发明申请公开(公告)号：US20080275329A1
公开(公告)日：2008-11-06
申请号：US11800374
申请日：2007-05-04
申请人： Scott B. Reeder , Reed Busse , Jean H. Brittain
发明人： Scott B. Reeder , Reed Busse , Jean H. Brittain
IPC分类号： A61B5/055
CPC分类号： G01R33/56341
摘要： A preparatory pulse sequence is applied prior to an imaging pulse sequence during a diffusion-weighted MRI scan. The preparatory pulse sequence diffusion weights the longitudinal magnetization using a gradient waveform that is first moment nulled to reduce image artifacts caused by patient motion.
摘要翻译： 在扩散加权MRI扫描期间，在成像脉冲序列之前应用预备脉冲序列。 准备脉冲序列扩散使用一个梯度波形对纵向磁化进行加权，该波形首先被归零，以减少由患者运动引起的图像伪影。
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8.发明授权公开(公告)号：US07804299B2
公开(公告)日：2010-09-28
申请号：US11800374
申请日：2007-05-04
申请人： Scott B. Reeder , Reed Busse , Jean H. Brittain
发明人： Scott B. Reeder , Reed Busse , Jean H. Brittain
IPC分类号： G01V3/00
CPC分类号： G01R33/56341
摘要： A preparatory pulse sequence is applied prior to an imaging pulse sequence during a diffusion-weighted MRI scan. The preparatory pulse sequence diffusion weights the longitudinal magnetization using a gradient waveform that is first moment nulled to reduce image artifacts caused by patient motion.
摘要翻译： 在扩散加权MRI扫描期间，在成像脉冲序列之前应用预备脉冲序列。 准备脉冲序列扩散使用一个梯度波形对纵向磁化进行加权，该波形首先被归零，以减少由患者运动引起的图像伪影。
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9.发明授权Homodyne reconstruction of water and fat images based on iterative decomposition of MRI signals 有权基于MRI信号的迭代分解的水和脂肪图像的零差重建公开(公告)号：US07298144B2
公开(公告)日：2007-11-20
申请号：US11253825
申请日：2005-10-18
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/5608
摘要： Homodyne image reconstruction is combined with an iterative decomposition of water and fat from MR signals obtained from a partial k-space signal acquisition in order to maximize the resolution of calculated water and fat images. The method includes asymmetrical acquisition of under-sampled MRI data, obtaining low resolution images, and then estimating a magnetic field map and phase maps of water and fat image signals from the low resolution images. The acquired data is again filtered and Fourier transformed to obtain an estimate of combined fat and water signals using the estimated magnetic field map and phase maps. Water and fat images are then estimated from which phases of the water and fat images are determined. The real parts of the water and fat images are then used in calculating water and fat images using a homodyne process.
摘要翻译： 将零差图像重建与从部分k空间信号采集获得的MR信号的水和脂肪的迭代分解相结合，以便最大化计算出的水和脂肪图像的分辨率。 该方法包括对采样不全的MRI数据进行不对称采集，获得低分辨率图像，然后从低分辨率图像中估计出水分和脂肪图像信号的磁场图和相位图。 所获取的数据再次被滤波和傅里叶变换，以使用估计的磁场图和相位图来获得组合的脂肪和水信号的估计。 然后估计水和脂肪图像，从而确定水和脂肪图像的哪个阶段。 然后将水和脂肪图像的真实部分用于使用零差过程计算水和脂肪图像。
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10.发明申请METHOD FOR SEPARATING MAGNETIC RESONANCE IMAGING SIGNALS USING SPECTRAL DISTINCTION OF SPECIES 有权使用光谱分析物种分离磁共振成像信号的方法公开(公告)号：US20110254547A1
公开(公告)日：2011-10-20
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： G01R33/48
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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