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。

公开(公告)号：US20120169337A1

公开(公告)日：2012-07-05

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

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。

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。

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。

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。

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。

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。

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。

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。

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。