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11. 发明授权

US08717025B2 Method and system for echo planar imaging with slice selection also occurring concurrently with phase encoding, during readout 有权
标题翻译：回波平面成像与切片选择的方法和系统也与读取期间的相位编码同时进行
公开(公告)号：US08717025B2
公开(公告)日：2014-05-06
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： G01R33/561 , G01R33/565
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。

12. 发明授权

US08692551B2 Magnetic resonance imaging water-fat separation method 有权
标题翻译：磁共振成像水脂分离法
公开(公告)号：US08692551B2
公开(公告)日：2014-04-08
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： G01V3/00
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，从而减少了MRI扫描时间，缩短了整个成像时间，并提高了MRI设备的效率。

13. 发明申请

US20110274331A1 MAGNETIC RESONANCE IMAGING METHOD FOR ACHIEVING WATER-FAT SEPARATION 审中-公开
标题翻译：用于实现水分离的磁共振成像方法
公开(公告)号：US20110274331A1
公开(公告)日：2011-11-10
申请号：US13097245
申请日：2011-04-29
申请人： De He Weng
发明人： De He Weng
IPC分类号： G06K9/00
CPC分类号： G01R33/4824 , G01R33/4828
摘要： A magnetic resonance imaging method for achieving water-fat separation; the method includes utilizing BLADE trajectories to collect the original data of one in-phase image and the original data of two out-of-phase images; reconstructing the in-phase image on the basis of the original data of the in-phase image, and utilizing the original data of the in-phase image to perform phase correction on the original data of the out-of-phase images, and reconstructing the out-of-phase images; and calculating the images of water and fat on the basis of the in-phase image and the out-of-phase images. Since the BLADE trajectory is used to acquire the k-space data, it provides the advantages that the BLADE trajectories are insensitive to the motion and pulsation of a rigid body, reduce the degree of sensitivity to motion artifacts, and also improve the images' signal-to-noise ratio.
摘要翻译：用于实现水分离的磁共振成像方法; 该方法包括利用BLADE轨迹收集一个同相图像的原始数据和两个异相图像的原始数据; 基于同相图像的原始数据重构同相图像，并利用同相图像的原始数据对异相图像的原始数据进行相位校正，并重建异相图像; 并基于同相图像和异相图像计算水分和脂肪的图像。由于BLADE轨迹用于获取k空间数据，因此它提供了BLADE轨迹对刚体的运动和脉动不敏感的优点，降低了对运动伪像的敏感度，并且还改善了图像的信号噪声比。

14. 发明申请

US20110267057A1 DYNAMIC FREQUENCY DRIFT CORRECTION METHOD IN MAGNETIC RESONANCE IMAGING 有权
标题翻译：动态谐波成像中的动态频率干扰校正方法
公开(公告)号：US20110267057A1
公开(公告)日：2011-11-03
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
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。

15. 发明授权

US08023705B2 Method for reconstructing image from echo planar imaging sequence 失效
标题翻译：从回波平面成像序列重建图像的方法
公开(公告)号：US08023705B2
公开(公告)日：2011-09-20
申请号：US11863509
申请日：2007-09-28
申请人： De He Weng , Wei Jun Zhang
发明人： De He Weng , Wei Jun 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。

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