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1. 发明申请

US20130158384A1 Systems and Methods for Magnetic Resonance Imaging 有权
标题翻译：磁共振成像系统与方法
公开(公告)号：US20130158384A1
公开(公告)日：2013-06-20
申请号：US13769917
申请日：2013-02-19
申请人： Eun-Kee Jeong , Dennis L. Parker , Kim Seong-Eun Choi , Evgueni G. Kholmovski
发明人： Eun-Kee Jeong , Dennis L. Parker , Kim Seong-Eun Choi , Evgueni G. Kholmovski
IPC分类号： A61B5/055
CPC分类号： A61B5/055 , G01R33/4806 , G01R33/5615 , G01R33/5616 , G01R33/56341 , G01R33/56509 , G01R33/56536 , G01R33/5676
摘要： Methods and apparatus for operating an MRI system is provided. The disclosure provides a diffusion-prepared driven-equilibrium preparation for an imaging volume and acquiring 3-dimensional k-space data from said prepared volume by a plurality of echoplanar readouts of stimulated echoes. An excitation radio-frequency signal and first and second inversion RF signals are provided to define a field-of-view (FOV).
摘要翻译：提供了用于操作MRI系统的方法和装置。本公开提供了用于成像体积的扩散制备的驱动平衡准备并且通过多个受激回波的回波平面读出从所述准备的体积获取三维k空间数据。激励射频信号和第一和第二反转RF信号被提供以定义视野（FOV）。

2. 发明授权

US08406849B2 Systems and methods for magnetic resonance imaging 失效
标题翻译：用于磁共振成像的系统和方法
公开(公告)号：US08406849B2
公开(公告)日：2013-03-26
申请号：US11732382
申请日：2007-04-02
申请人： Eun-Kee Jeong , Dennis L. Parker , Kim Seong-Eun Choi , Evgueni G. Kholmovski
发明人： Eun-Kee Jeong , Dennis L. Parker , Kim Seong-Eun Choi , Evgueni G. Kholmovski
IPC分类号： A61B5/05
CPC分类号： A61B5/055 , G01R33/4806 , G01R33/5615 , G01R33/5616 , G01R33/56341 , G01R33/56509 , G01R33/56536 , G01R33/5676
摘要： Methods and apparatus for operating an MRI system is provided. The disclosure provides a diffusion-prepared driven-equilibrium preparation for an imaging volume and acquiring 3-dimensional k-space data from said prepared volume by a plurality of echoplanar readouts of stimulated echoes. An excitation radio-frequency signal and first and second inversion RF signals are provided to define a field-of-view (FOV).
摘要翻译：提供了用于操作MRI系统的方法和装置。本公开提供了用于成像体积的扩散制备的驱动平衡准备并且通过多个受激回波的回波平面读出从所述准备的体积获取三维k空间数据。激励射频信号和第一和第二反转RF信号被提供以定义视野（FOV）。

3. 发明授权

US08427156B2 Systems and methods for image reconstruction of sensitivity encoded MRI data 有权
公开(公告)号：US08427156B2
公开(公告)日：2013-04-23
申请号：US12972192
申请日：2010-12-17
申请人： Evgueni G. Kholmovski , Dennis Lee Parker , Edward V. R. DiBella
发明人： Evgueni G. Kholmovski , Dennis Lee Parker , Edward V. R. DiBella
IPC分类号： G01V3/00 , A61B5/05
CPC分类号： G01R33/5611
摘要： Methods and systems in a parallel magnetic resonance imaging (MRI) system utilize sensitivity-encoded MRI data acquired from multiple receiver coils together with spatially dependent receiver coil sensitivities to generate MRI images. The acquired MRI data forms a reduced MRI data set that is undersampled in at least a phase-encoding direction in a frequency domain. The acquired MRI data and auto-calibration signal data are used to determine reconstruction coefficients for each receiver coil using a weighted or a robust least squares method. The reconstruction coefficients vary spatially with respect to at least the spatial coordinate that is orthogonal to the undersampled, phase-encoding direction(s) (e.g., a frequency encoding direction). Values for unacquired MRI data are determined by linearly combining the reconstruction coefficients with the acquired MRI data within neighborhoods in the frequency domain that depend on imaging geometry, coil sensitivity characteristics, and the undersampling factor of the acquired MRI data. An MRI image is determined from the reconstructed unacquired data and the acquired MRI data.

4. 发明申请

US20090224759A1 SYSTEMS AND METHODS FOR RECONSTRUCTION OF SENSITIVITY ENCODED MRI DATA 有权
标题翻译：用于重建感光度编码的MRI数据的系统和方法
公开(公告)号：US20090224759A1
公开(公告)日：2009-09-10
申请号：US12414632
申请日：2009-03-30
申请人： Evgueni G. Kholmovski , Dennis Lee Parker
发明人： Evgueni G. Kholmovski , Dennis Lee Parker
IPC分类号： G01R33/20
CPC分类号： G01R33/5611
摘要： Methods and systems in a parallel magnetic resonance imaging (MRI) system utilize sensitivity-encoded MRI data acquired from multiple receiver coils together with spatially dependent receiver coil sensitivities to generate MRI images. The acquired MRI data forms a reduced MRI data set that is undersampled in at least a phase-encoding direction in a frequency domain. The acquired MRI data and auto-calibration signal data are used to determine reconstruction coefficients for each receiver coil using a weighted or a robust least squares method. The reconstruction coefficients vary spatially with respect to at least the spatial coordinate that is orthogonal to the undersampled, phase-encoding direction(s) (e.g., a frequency encoding direction). Values for unacquired MRI data are determined by linearly combining the reconstruction coefficients with the acquired MRI data within neighborhoods in the frequency domain that depend on imaging geometry, coil sensitivity characteristics, and the undersampling factor of the acquired MRI data. An MRI image is determined from the reconstructed unacquired data and the acquired MRI data.
摘要翻译：并行磁共振成像（MRI）系统中的方法和系统利用从多个接收器线圈获取的灵敏度编码的MRI数据以及空间相关的接收器线圈灵敏度来产生MRI图像。获取的MRI数据形成在频域中的至少相位编码方向上欠采样的减小的MRI数据集。所获取的MRI数据和自动校准信号数据用于使用加权或鲁棒最小二乘法来确定每个接收器线圈的重建系数。至少相对于欠采样的相位编码方向（例如，频率编码方向）正交的空间坐标，重建系数在空间上变化。通过线性组合重构系数与取决于所获取的MRI数据的成像几何，线圈灵敏度特性和欠采样因子的频域中的邻域内的获取的MRI数据来确定未查询的MRI数据的值。根据重建的无序数据和获取的MRI数据确定MRI图像。

5. 发明授权

US07884604B2 Systems and methods for reconstruction of sensitivity encoded MRI data 有权
标题翻译：用于图像重建的灵敏度编码MRI数据的系统和方法
公开(公告)号：US07884604B2
公开(公告)日：2011-02-08
申请号：US12414632
申请日：2009-03-30
申请人： Evgueni G. Kholmovski , Dennis Lee Parker
发明人： Evgueni G. Kholmovski , Dennis Lee Parker
IPC分类号： G01V3/00 , A61B5/05
CPC分类号： G01R33/5611
摘要： Methods and systems in a parallel magnetic resonance imaging (MRI) system utilize sensitivity-encoded MRI data acquired from multiple receiver coils together with spatially dependent receiver coil sensitivities to generate MRI images. The acquired MRI data forms a reduced MRI data set that is undersampled in at least a phase-encoding direction in a frequency domain. The acquired MRI data and auto-calibration signal data are used to determine reconstruction coefficients for each receiver coil using a weighted or a robust least squares method. The reconstruction coefficients vary spatially with respect to at least the spatial coordinate that is orthogonal to the undersampled, phase-encoding direction(s) (e.g., a frequency encoding direction). Values for unacquired MRI data are determined by linearly combining the reconstruction coefficients with the acquired MRI data within neighborhoods in the frequency domain that depend on imaging geometry, coil sensitivity characteristics, and the undersampling factor of the acquired MRI data. An MRI image is determined from the reconstructed unacquired data and the acquired MRI data.
摘要翻译：并行磁共振成像（MRI）系统中的方法和系统利用从多个接收器线圈获取的灵敏度编码的MRI数据以及空间相关的接收器线圈灵敏度来产生MRI图像。获取的MRI数据形成在频域中的至少相位编码方向上欠采样的减小的MRI数据集。所获取的MRI数据和自动校准信号数据用于使用加权或鲁棒最小二乘法来确定每个接收器线圈的重建系数。至少相对于欠采样的相位编码方向（例如，频率编码方向）正交的空间坐标，重建系数在空间上变化。通过线性组合重构系数与取决于所获取的MRI数据的成像几何，线圈灵敏度特性和欠采样因子的频域中的邻域内的获取的MRI数据来确定未查询的MRI数据的值。根据重建的无序数据和获取的MRI数据确定MRI图像。

6. 发明授权

US07511495B2 Systems and methods for image reconstruction of sensitivity encoded MRI data 有权
标题翻译：用于图像重建的灵敏度编码MRI数据的系统和方法
公开(公告)号：US07511495B2
公开(公告)日：2009-03-31
申请号：US11412073
申请日：2006-04-25
申请人： Evgueni G. Kholmovski , Dennis Lee Parker , Edward V. R. Dibella
发明人： Evgueni G. Kholmovski , Dennis Lee Parker , Edward V. R. Dibella
IPC分类号： G01V3/00
CPC分类号： G01R33/5611
摘要： Methods and systems in a parallel magnetic resonance imaging (MRI) system utilize sensitivity-encoded MRI data acquired from multiple receiver coils together with spatially dependent receiver coil sensitivities to generate MRI images. The acquired MRI data forms a reduced MRI data set that is undersampled in at least a phase-encoding direction in a frequency domain. The acquired MRI data and auto-calibration signal data are used to determine reconstruction coefficients for each receiver coil using a weighted or a robust least squares method. The reconstruction coefficients vary spatially with respect to at least the spatial coordinate that is orthogonal to the undersampled, phase-encoding direction(s) (e.g., a frequency encoding direction). Values for unacquired MRI data are determined by linearly combining the reconstruction coefficients with the acquired MRI data within neighborhoods in the frequency domain that depend on imaging geometry, coil sensitivity characteristics, and the undersampling factor of the acquired MRI data. An MRI image is determined from the reconstructed unacquired data and the acquired MRI data.
摘要翻译：并行磁共振成像（MRI）系统中的方法和系统利用从多个接收器线圈获取的灵敏度编码的MRI数据以及空间相关的接收器线圈灵敏度来产生MRI图像。获取的MRI数据形成在频域中的至少相位编码方向上欠采样的减小的MRI数据集。所获取的MRI数据和自动校准信号数据用于使用加权或鲁棒最小二乘法来确定每个接收器线圈的重建系数。至少相对于欠采样的相位编码方向（例如，频率编码方向）正交的空间坐标，重建系数在空间上变化。通过线性组合重构系数与取决于所获取的MRI数据的成像几何，线圈灵敏度特性和欠采样因子的频域中的邻域内的获取的MRI数据来确定未查询的MRI数据的值。根据重建的无序数据和获取的MRI数据确定MRI图像。

7. 发明申请

US20090087057A1 METHOD AND SYSTEM FOR MOTION CORRECTION IN IMAGING SYSTEMS 有权
标题翻译：成像系统运动校正的方法与系统
公开(公告)号：US20090087057A1
公开(公告)日：2009-04-02
申请号：US12190287
申请日：2008-08-12
申请人： Dennis Lee Parker , Evgueni G. Kholmovski
发明人： Dennis Lee Parker , Evgueni G. Kholmovski
IPC分类号： G06K9/03
CPC分类号： G01R33/56509 , G01R33/561 , G01R33/5611 , G06T5/003 , G06T5/10 , G06T5/50 , G06T7/20 , G06T2207/10088 , G06T2207/20056 , G06T2207/20201 , G06T2207/30004
摘要： A method, a system, and a computer-readable medium are provided which perform motion correction of image data. A first set of data and a second set of data of k-space data of an object to be imaged are received. The first set of data and the second set of data include a plurality of phase encoded lines that encompass the object to be imaged. The first set of data correlates with the second set of data. A cross-correlation is calculated by multiplying the first set of data and the second set of data in k-space. A value of the motion of the object to be imaged that occurred between acquisition of the first set of data and acquisition of the second set of data is calculated using the cross-correlation. The second set of data is corrected using the calculated value to remove the motion. The correction process is repeated until the k-space data is completely processed.
摘要翻译：提供了执行图像数据的运动校正的方法，系统和计算机可读介质。接收要成像的对象的k空间数据的第一组数据和第二组数据。第一组数据和第二组数据包括包含待成像对象的多个相位编码线。第一组数据与第二组数据相关。通过将第一组数据和第二组数据乘以k空间来计算互相关。使用互相关来计算在获取第一组数据和获取第二组数据之间发生的待成像对象的运动的值。第二组数据使用计算值进行修正以消除运动。重复校正处理直到k空间数据被完全处理。

8. 发明授权

US07429862B2 PPA MRT method and apparatus with scaled contribution of k-space data to the reconstructed image 有权
标题翻译： PPA MRT方法和装置，其具有k空间数据对重建图像的贡献
公开(公告)号：US07429862B2
公开(公告)日：2008-09-30
申请号：US11406573
申请日：2006-04-18
申请人： Evgueni G. Kholmovski , Stephan Kannengiesser
发明人： Evgueni G. Kholmovski , Stephan Kannengiesser
IPC分类号： G01V3/00
CPC分类号： G01R33/5611
摘要： In a PPA MRT method and apparatus, a selected region of k-space containing respective portions of some of the incomplete, measured data lines and respective portions of some of the complete, reconstructed data lines is designated. For each data line in the selected region, a level of the noise therein is identified. For each reconstructed, complete data line in the selected region, a scaling factor is calculated that is dependent on the noise level in that reconstructed, complete data line and the noise level in at least one neighboring incomplete, measured data line in the selected region. The scaling factor is then applied to the reconstructed, complete data line in question, so that the contribution of that line to the overall reconstructed image is adjusted according to the scaling factor. The scaling factor can be limited dependent on where the selected region is located in k-space.
摘要翻译：在PPA MRT方法和装置中，指定包含一些不完整测量数据线的各部分的k空间的选定区域以及一些完整的重建数据线的相应部分。对于所选区域中的每个数据线，识别其中的噪声水平。对于所选区域中的每个重建的完整数据线，计算取决于该重建的完整数据线中的噪声电平和所选区域中的至少一个相邻不完整测量数据线中的噪声电平的缩放因子。然后将缩放因子应用于所讨论的重建的完整数据线，使得根据缩放因子来调整该线对整个重建图像的贡献。缩放因子可以根据所选择的区域在k空间中的位置进行限制。

9. 发明授权

US08155389B2 Method and system for motion correction in imaging systems 有权
标题翻译：成像系统中运动校正的方法和系统
公开(公告)号：US08155389B2
公开(公告)日：2012-04-10
申请号：US12190287
申请日：2008-08-12
申请人： Dennis Lee Parker , Evgueni G. Kholmovski
发明人： Dennis Lee Parker , Evgueni G. Kholmovski
IPC分类号： G06K9/00
CPC分类号： G01R33/56509 , G01R33/561 , G01R33/5611 , G06T5/003 , G06T5/10 , G06T5/50 , G06T7/20 , G06T2207/10088 , G06T2207/20056 , G06T2207/20201 , G06T2207/30004
摘要： A method, a system, and a computer-readable medium are provided which perform motion correction of image data. A first set of data and a second set of data of k-space data of an object to be imaged are received. The first set of data and the second set of data include a plurality of phase encoded lines that encompass the object to be imaged. The first set of data correlates with the second set of data. A cross-correlation is calculated by multiplying the first set of data and the second set of data in k-space. A value of the motion of the object to be imaged that occurred between acquisition of the first set of data and acquisition of the second set of data is calculated using the cross-correlation. The second set of data is corrected using the calculated value to remove the motion. The correction process is repeated until the k-space data is completely processed.
摘要翻译：提供了执行图像数据的运动校正的方法，系统和计算机可读介质。接收要成像的对象的k空间数据的第一组数据和第二组数据。第一组数据和第二组数据包括包含待成像对象的多个相位编码线。第一组数据与第二组数据相关。通过将第一组数据和第二组数据乘以k空间来计算互相关。使用互相关来计算在获取第一组数据和获取第二组数据之间发生的待成像对象的运动的值。第二组数据使用计算值进行修正以消除运动。重复校正处理直到k空间数据被完全处理。

10. 发明申请

US20110084693A1 SYSTEMS AND METHODS FOR IMAGE RECONSTRUCTION OF SENSITIVITY ENCODED MRI DATA 有权
标题翻译：用于图像重建的灵敏度编码的MRI数据的系统和方法
公开(公告)号：US20110084693A1
公开(公告)日：2011-04-14
申请号：US12972192
申请日：2010-12-17
申请人： Evgueni G. Kholmovski , Dennis Lee Parker
发明人： Evgueni G. Kholmovski , Dennis Lee Parker
IPC分类号： G01R33/44
CPC分类号： G01R33/5611
摘要： Methods and systems in a parallel magnetic resonance imaging (MRI) system utilize sensitivity-encoded MRI data acquired from multiple receiver coils together with spatially dependent receiver coil sensitivities to generate MRI images. The acquired MRI data forms a reduced MRI data set that is undersampled in at least a phase-encoding direction in a frequency domain. The acquired MRI data and auto-calibration signal data are used to determine reconstruction coefficients for each receiver coil using a weighted or a robust least squares method. The reconstruction coefficients vary spatially with respect to at least the spatial coordinate that is orthogonal to the undersampled, phase-encoding direction(s) (e.g., a frequency encoding direction). Values for unacquired MRI data are determined by linearly combining the reconstruction coefficients with the acquired MRI data within neighborhoods in the frequency domain that depend on imaging geometry, coil sensitivity characteristics, and the undersampling factor of the acquired MRI data. An MRI image is determined from the reconstructed unacquired data and the acquired MRI data.
摘要翻译：并行磁共振成像（MRI）系统中的方法和系统利用从多个接收器线圈获取的灵敏度编码的MRI数据以及空间相关的接收器线圈灵敏度来产生MRI图像。获取的MRI数据形成在频域中的至少相位编码方向上欠采样的减小的MRI数据集。所获取的MRI数据和自动校准信号数据用于使用加权或鲁棒最小二乘法来确定每个接收器线圈的重建系数。至少相对于欠采样的相位编码方向（例如，频率编码方向）正交的空间坐标，重建系数在空间上变化。通过线性组合重构系数与取决于所获取的MRI数据的成像几何，线圈灵敏度特性和欠采样因子的频域中的邻域内的获取的MRI数据来确定未查询的MRI数据的值。根据重建的无序数据和获取的MRI数据确定MRI图像。

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