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1. 发明授权

US09594146B2 Trajectory correction method and apparatus for k-space data in magnetic resonance imaging 有权
标题翻译：磁共振成像中k空间数据的轨迹校正方法和装置
公开(公告)号：US09594146B2
公开(公告)日：2017-03-14
申请号：US13927376
申请日：2013-06-26
申请人： De He Weng , Qiong Zhang
发明人： De He Weng , Qiong Zhang
IPC分类号： G01R35/00 , G01R33/565 , G01R33/48
CPC分类号： G01R35/005 , G01R33/482 , G01R33/4822 , G01R33/4824 , G01R33/565
摘要： In a trajectory correction method and apparatus for k-space data points in magnetic resonance imaging, a magnetic resonance data acquisition unit is operated to execute a sampling sequence to obtain k-space to be corrected. Empirical points are selected used to divide k-space to be corrected into a central region and a peripheral region. The trajectories of the data points in the central region and the peripheral region are corrected and the sampling sequence is executed again, with the corrected trajectories, to obtain corrected k-space.
摘要翻译：在用于磁共振成像中的k空间数据点的轨迹校正方法和装置中，操作磁共振数据获取单元以执行采样序列以获得要校正的k空间。经验点被选择用于将要校正的k空间划分为中心区域和外围区域。校正中心区域和外围区域中的数据点的轨迹，并且利用校正的轨迹再次执行采样序列，以获得校正的k空间。

2. 发明申请

US20140005969A1 TRAJECTORY CORRECTION METHOD AND APPARATUS FOR K-SPACE DATA IN MAGNETIC RESONANCE IMAGING 有权
标题翻译：磁共振成像中K空间数据的轨迹校正方法和装置
公开(公告)号：US20140005969A1
公开(公告)日：2014-01-02
申请号：US13927376
申请日：2013-06-26
申请人： De He Weng , Qiong Zhang
发明人： De He Weng , Qiong Zhang
IPC分类号： G01R35/00 , G01R33/48
CPC分类号： G01R35/005 , G01R33/482 , G01R33/4822 , G01R33/4824 , G01R33/565
摘要： In a trajectory correction method and apparatus for k-space data points in magnetic resonance imaging, a magnetic resonance data acquisition unit is operated to execute a sampling sequence to obtain k-space to be corrected. Empirical points are selected used to divide k-space to be corrected into a central region and a peripheral region. The trajectories of the data points in the central region and the peripheral region are corrected and the sampling sequence is executed again, with the corrected trajectories, to obtain corrected k-space.
摘要翻译：在用于磁共振成像中的k空间数据点的轨迹校正方法和装置中，操作磁共振数据获取单元以执行采样序列以获得要校正的k空间。经验点被选择用于将要校正的k空间划分为中心区域和外围区域。校正中心区域和外围区域中的数据点的轨迹，并且利用校正的轨迹再次执行采样序列，以获得校正的k空间。

3. 发明授权

US09390476B2 Magnetic resonance imaging method and device achieving water/fat separation 有权
标题翻译：磁共振成像方法和设备实现水/脂肪分离
公开(公告)号：US09390476B2
公开(公告)日：2016-07-12
申请号：US13927359
申请日：2013-06-26
申请人： De He Weng
发明人： De He Weng
IPC分类号： G06K9/00 , G06T5/00 , G01R33/565 , G01R33/48 , G01R33/561
CPC分类号： G06T5/001 , G01R33/4824 , G01R33/4828 , G01R33/5617 , G01R33/56509
摘要： In a magnetic resonance imaging method and apparatus for water/fat separation, a turbo spin echo BLADE (TSE BLADE) artifact correction sequence is executed to acquire original data for an in-phase image and original data for an opposite-phase image, and an in-phase image on the basis of the original data for the in-phase image and an opposite-phase image on the basis of the original data for the in-phase image and the original data for the opposite-phase image are reconstructed. Water and fat images are calculated on the basis of the reconstructed in-phase image and opposite-phase image. By using a TSE BLADE sequence to acquire k-space data, the advantage of the BLADE sequence of being insensitive to rigid body motion and pulsation is inherently present, thereby reducing sensitivity to motion artifacts while improving the image signal-to-noise ratio.
摘要翻译：在用于水/脂分离的磁共振成像方法和装置中，执行涡旋自旋回波BLADE（TSE BLADE）伪像校正序列以获取用于反相图像的同相图像的原始数据和原始数据，并且基于用于同相图像的原始数据和基于同相图像的原始数据和反相图像的原始数据的反相图像的同相图像被重构。基于重建的同相图像和反相图像计算水和脂肪图像。通过使用TSE BLADE序列来获取k空间数据，BLADE序列对刚体运动和脉动不敏感的优点固有地存在，从而降低对运动伪影的敏感性，同时改善图像信噪比。

4. 发明申请

US20110267054A1 MAGNETIC RESONANCE IMAGING WATER-FAT SEPARATION METHOD 有权
标题翻译：磁共振成像水分离方法
公开(公告)号：US20110267054A1
公开(公告)日：2011-11-03
申请号：US13097311
申请日：2011-04-29
申请人： Qiang He , De He Weng
发明人： Qiang He , De He Weng
IPC分类号： G01R33/44
CPC分类号： A61B5/055 , G01R33/4824 , G01R33/4828
摘要： A magnetic resonance imaging (MRI) water-fat separation method includes acquiring in-phase image raw measurement data and out-of-phase image raw measurement data with an MRI device, reconstructing an in-phase image and an out-of-phase image according to a system matrix and the raw measurement data using the penalty function regularized iterative reconstruction method, and calculating water and fat images according to the in-phase image and the out-of-phase image. The use of the penalty function regularized iterative method eliminates the need for k-space raw measurement data with a 100% sampling rate, thereby reducing the MRI scan time, shortening the entire imaging time, and improving the efficiency of the MRI device.
摘要翻译：磁共振成像（MRI）水分离方法包括用MRI装置获取同相图像原始测量数据和异相图像原始测量数据，重建同相图像和异相图像根据系统矩阵和使用惩罚函数正则化迭代重建方法的原始测量数据，并根据同相图像和异相图像计算水和脂肪图像。使用惩罚函数正则化迭代方法消除了对具有100％采样率的k空间原始测量数据的需要，从而减少MRI扫描时间，缩短整个成像时间，并提高MRI设备的效率。

5. 发明申请

US20110181280A1 METHOD AND SYSTEM FOR ECHO PLANAR IMAGING 有权
标题翻译： ECHO平面图像的方法和系统
公开(公告)号：US20110181280A1
公开(公告)日：2011-07-28
申请号：US12908026
申请日：2010-10-20
申请人： De He Weng
发明人： De He Weng
IPC分类号： G01R33/44
CPC分类号： G01R33/5616 , G01R33/56536 , G01R33/56554 , G01R33/56563
摘要： In a method and system for echo planar imaging, after having applied a radiofrequency pulse and a slice selection gradient, continuous readout gradients alternating between positive and negative are applied and a phase encoding gradient is applied before starting each readout gradient. A slice selection gradient is applied at the same time as applying the phase encoding gradient. Scanning signals are collected during the duration of the readout gradients. Image reconstruction is implemented based on the scanning signals to obtain a scanned image.
摘要翻译：在用于回波平面成像的方法和系统中，在应用射频脉冲和切片选择梯度之后，施加在正和负之间交替的连续读出梯度，并且在开始每个读出梯度之前应用相位编码梯度。在应用相位编码梯度的同时应用切片选择梯度。在读出梯度的持续时间内收集扫描信号。基于扫描信号实现图像重建以获得扫描图像。

6. 发明授权

US07664541B2 Multi-channel magnetic resonance imaging reconstruction method for water-fat separation 失效
标题翻译：用于水脂分离的多通道磁共振成像重建方法
公开(公告)号：US07664541B2
公开(公告)日：2010-02-16
申请号：US11363918
申请日：2006-02-28
申请人： Jian Min Wang , De He Weng
发明人： Jian Min Wang , De He Weng
IPC分类号： A61B5/05 , G01V3/00
CPC分类号： A61B5/4869 , G01R33/4828
摘要： In a multi-channel magnetic resonance imaging reconstruction method for water-fat separation, one in-phase image and two opposed-phase images are acquired with multiple reception coils in respective channels. The sensitivity distribution of the coils of the respective channels is calculated. The images of respective channels are merged dependent on the sensitivity distribution. A phase difference between the two opposed-phase images is calculated. At lease one characteristic region of the in-phase image is detected, which is used as a criterion for phase correction. The phases of the opposed-phase images are corrected and images of water and fat are calculated. The method provides stable and reliable imaging, has a short reconstruction time and also solves the problem that images of water and fat may be exchanged.
摘要翻译：在用于水脂分离的多通道磁共振成像重建方法中，在相应通道中采用多个接收线圈获取一个同相图像和两个相对相位图像。计算各个通道的线圈的灵敏度分布。根据灵敏度分布合并各个通道的图像。计算两个相对相位图像之间的相位差。检测到同相图像的至少一个特征区域，其用作相位校正的标准。校正相对相图像的相位，并计算水和脂肪的图像。该方法提供稳定可靠的成像，缩短重建时间，解决了水和脂肪图像可以交换的问题。

7. 发明授权

US08890526B2 Method and apparatus for making distinction in a magnetic resonance imaging water-fat image 有权
标题翻译：用于在磁共振成像水脂肪图像中区分的方法和装置
公开(公告)号：US08890526B2
公开(公告)日：2014-11-18
申请号：US13339660
申请日：2011-12-29
申请人： De He Weng
发明人： De He Weng
IPC分类号： G01R33/48 , G01R33/34 , A61B5/00 , A61B5/055
CPC分类号： A61B5/055 , A61B5/4872 , A61B5/4875
摘要： In a method and an apparatus for making a distinction in a magnetic resonance imaging water-fat image, three echoes are acquired without phase encoding as a reference scan, a reference water-fat image projection is calculated in the phase encoding direction using the reference scan, a complete water-fat image projection is calculated in the phase encoding direction according to a water image and a fat image obtained by a three-point Dixon method, a correlation between the reference water-fat image projection and the complete water-fat image projection is calculated to obtain at least two correlated values, and the maximum correlated value is acquired therefrom, so as to determine the type of said image calculated by using the three-point Dixon method.
摘要翻译：在用于区分磁共振成像水脂图像的方法和装置中，获取三个回波而无需相位编码作为参考扫描，使用参考扫描在相位编码方向上计算参考水脂肪图像投影根据通过三点式Dixon方法获得的水图像和脂肪图像，参照水脂肪图像投影和完整的水脂图像之间的相关性，在相位编码方向上计算完整的水脂肪图像投影计算投影以获得至少两个相关值，并从其获取最大相关值，以便确定通过使用三点Dixon方法计算的所述图像的类型。

8. 发明申请

US20140003694A1 MAGNETIC RESONANCE IMAGING METHOD AND DEVICE ACHIEVING WATER/FAT SEPARATION 有权
标题翻译：磁共振成像方法和实现水/脂肪分离的装置
公开(公告)号：US20140003694A1
公开(公告)日：2014-01-02
申请号：US13927359
申请日：2013-06-26
申请人： De He Weng
发明人： De He Weng
IPC分类号： G06T5/00
CPC分类号： G06T5/001 , G01R33/4824 , G01R33/4828 , G01R33/5617 , G01R33/56509
摘要： In a magnetic resonance imaging method and apparatus for water/fat separation, a turbo spin echo BLADE (TSE BLADE) artifact correction sequence is executed to acquire original data for an in-phase image and original data for an opposite-phase image, and an in-phase image on the basis of the original data for the in-phase image and an opposite-phase image on the basis of the original data for the in-phase image and the original data for the opposite-phase image are reconstructed. Water and fat images are calculated on the basis of the reconstructed in-phase image and opposite-phase image. By using a TSE BLADE sequence to acquire k-space data, the advantage of the BLADE sequence of being insensitive to rigid body motion and pulsation is inherently present, thereby reducing sensitivity to motion artifacts while improving the image signal-to-noise ratio.
摘要翻译：在用于水/脂分离的磁共振成像方法和装置中，执行涡旋自旋回波BLADE（TSE BLADE）伪像校正序列以获取用于反相图像的同相图像的原始数据和原始数据，并且基于用于同相图像的原始数据和基于同相图像的原始数据和反相图像的原始数据的反相图像的同相图像被重构。基于重建的同相图像和反相图像计算水和脂肪图像。通过使用TSE BLADE序列来获取k空间数据，BLADE序列对刚体运动和脉动不敏感的优点固有地存在，从而降低对运动伪影的敏感性，同时改善图像信噪比。

9. 发明申请

US20080089570A1 METHOD FOR RECONSTRUCTING IMAGE FROM ECHO PLANAR IMAGING SEQUENCE 失效
标题翻译：从ECHO平面图像序列重构图像的方法
公开(公告)号：US20080089570A1
公开(公告)日：2008-04-17
申请号：US11863509
申请日：2007-09-28
申请人： De He Weng , Wei Zhang
发明人： De He Weng , Wei Zhang
IPC分类号： G06K9/00
CPC分类号： G01R33/5615 , G01R33/5616 , G01R33/56554
摘要： In a method for reconstructing an image from an echo planar imaging sequence, the echo planar imaging sequence is used to obtain multi-line k-space data from a subject and the multi-line k-space data are divided into odd line data and even line data. Fourier transform is performed on the odd line data and on the even line data separately to obtain corresponding amplitude images. The amplitude images obtained is this manner are added to produce the final image. The method effectively eliminates N/2 artifacts by over-sampling in the phase direction. By image reconstruction being carried out separately on the odd line data and even line data of k-space data and then integrating the images, the method effectively avoids the problem of the image signal loss caused by the mutual cancellation of the odd line data and even line data.
摘要翻译：在从回波平面成像序列重建图像的方法中，使用回波平面成像序列来从对象获得多行k空间数据，并且多行k空间数据被划分为奇数行数据和甚至线数据。对奇数行数据和偶数行数据进行傅里叶变换，以获得相应的幅度图像。获得的振幅图像被加入以产生最终图像。该方法通过在相位方向过采样有效地消除N / 2伪像。通过对奇数行数据和k空间数据的偶数行数据分别执行图像重建，然后对图像进行积分，该方法有效地避免了由奇数行数据的相互抵消引起的图像信号丢失的问题，甚至线数据。

10. 发明授权

US08907673B2 Dynamic frequency drift correction method in magnetic resonance imaging 有权
标题翻译：磁共振成像中的动态频率漂移校正方法
公开(公告)号：US08907673B2
公开(公告)日：2014-12-09
申请号：US13097270
申请日：2011-04-29
申请人： Qiang He , De He Weng , Xiao Dong Zhou
发明人： Qiang He , De He Weng , Xiao Dong Zhou
IPC分类号： G01R33/48 , G01R33/565
CPC分类号： G01R33/56563 , G01R33/4828
摘要： For magnetic resonance imaging (MRI), a dynamic frequency drift correction method for binomial water excitation method includes collecting the reference one-dimensional navigation signal by an MRI device; acquiring one current one-dimensional navigation signal after scanning N images, wherein N is a positive integer; calculating the frequency drift according to the reference one-dimensional navigation signal and the current one-dimensional navigation signal; calculating and setting the initial phase of the next radio frequency signal by the MRI device according to the frequency drift. The method provides real-time calculation of the main magnetic field frequency drift according to the one-dimensional navigation signal during the scanning period and corrects the phase of the radio frequency signal to ensure that the direction of the gradient field is always perpendicular to the plane formed by the spinning of fat protons, so there is only water signal remaining after excitation so that water images can be obtained.
摘要翻译：对于磁共振成像（MRI），用于二项式水激励方法的动态频率漂移校正方法包括通过MRI装置收集参考一维导航信号; 在扫描N个图像之后获取一个当前的一维导航信号，其中N是正整数; 根据参考一维导航信号和当前的一维导航信号计算频率漂移; 根据频率漂移，由MRI装置计算和设定下一个射频信号的初始相位。该方法根据扫描周期内的一维导航信号实时计算主磁场频率漂移，校正射频信号的相位，确保梯度场方向始终垂直于平面通过脂肪质子的旋转形成，所以在激发后只剩下水信号，从而可以获得水图像。

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