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1. 发明申请

US20120025826A1 Method For Reducing Artifacts In Magnetic Resonance Imaging 有权
标题翻译：磁共振成像中减少人造物的方法
公开(公告)号：US20120025826A1
公开(公告)日：2012-02-02
申请号：US13263608
申请日：2010-04-13
申请人： Xiaohong Joe Zhou , Novena A. Rangwala
发明人： Xiaohong Joe Zhou , Novena A. Rangwala
IPC分类号： G01R33/48
CPC分类号： G01R33/56518 , G01R33/4833 , G01R33/5617 , G01R33/56563 , G01R33/56572
摘要： Disclosed are methods for magnetic resonance imaging (MRI) that reduce the appearance of fast spin echo cups artifacts using a slice-titting gradient. In particular, the excited image slice is titted relative to the image slice selected by the refocusing RF pulse.
摘要翻译：公开了使用切割梯度减少快速自旋回波杯伪像的外观的磁共振成像（MRI）的方法。特别地，相对于由重聚焦RF脉冲选择的图像切片，激发图像切片。

2. 发明授权

US08847594B2 Method for reducing artifacts in magnetic resonance imaging 有权
标题翻译：降低磁共振成像中伪像的方法
公开(公告)号：US08847594B2
公开(公告)日：2014-09-30
申请号：US13263608
申请日：2010-04-13
申请人： Xiaohong Joe Zhou , Novena A. Rangwala
发明人： Xiaohong Joe Zhou , Novena A. Rangwala
IPC分类号： G01R33/48 , G01R33/565 , G01R33/483 , G01R33/561
CPC分类号： G01R33/56518 , G01R33/4833 , G01R33/5617 , G01R33/56563 , G01R33/56572
摘要： Disclosed are methods for magnetic resonance imaging (MRI) that reduce the appearance of artifacts in a final image. Also provided are a computer readable medium comprising instructions that when executed by a CPU results in the reduction of artifacts in a magnetic resonance image, and an MRI apparatus comprising the computer readable medium. Also disclosed is a data processing method that provides further reduction of residual artifacts in a magnetic resonance image. The disclosed methods provide a simple and effective approach to ameliorate various artifacts in virtually any type of MRI scanners.
摘要翻译：公开了用于减少最终图像中伪影出现的磁共振成像（MRI）的方法。还提供了一种包括指令的计算机可读介质，所述指令当由CPU执行时导致减少磁共振图像中的伪像，以及包括计算机可读介质的MRI装置。还公开了一种数据处理方法，其进一步减少磁共振图像中的残余伪像。所公开的方法提供了简单有效的方法来改善几乎任何类型的MRI扫描仪中的各种伪像。

3. 发明申请

US20130147478A1 Magnetic Resonance Imaging Using Steering-Propeller 有权
标题翻译：使用转向螺旋桨的磁共振成像
公开(公告)号：US20130147478A1
公开(公告)日：2013-06-13
申请号：US13695159
申请日：2011-04-29
申请人： Xiaohong Joe Zhou
发明人： Xiaohong Joe Zhou
IPC分类号： G01R33/44 , G01R33/28
CPC分类号： G01R33/44 , G01R33/28 , G01R33/4824 , G01R33/5617
摘要： A GRASE-type PROPELLER sequence called Steer-PROP is disclosed. This sequence exploits a serious of steer blips together with rewinding gradient pulse to traverse k-space. Steer-PROP improves the scan time by a factor of 3 or higher compared to FSE-PROPELLER, provides improved robustness to off-resonance effects compared to EPI-PROPELLER, and addresses a long-standing phase correction problem inherent to GRASE based sequences. Steer-PROP also enables intra-blade, inter-blade, and inter-shot phase errors to be separately determined and independently corrected.
摘要翻译：公开了称为Steer-PROP的GRASE型PROPELLER序列。该序列利用严重的转向抖动以及倒带梯度脉冲来遍历k空间。与FSE-PROPELLER相比，Steer-PROP将扫描时间提高了3倍或更高，与EPI-PROPELLER相比，提供了非共振效应的改进的鲁棒性，并且解决了基于GRASE的序列固有的长期相位校正问题。 Steer-PROP还可以单独确定和独立地校正刀片内，刀片间和插补相位误差。

4. 发明授权

US09612307B2 Reducing artifacts in magnetic resonance images acquired using propeller echo planar imaging 有权
公开(公告)号：US09612307B2
公开(公告)日：2017-04-04
申请号：US14113044
申请日：2012-04-23
申请人： Xiaohong Joe Zhou
发明人： Xiaohong Joe Zhou
IPC分类号： G01R33/565 , G01R33/48 , G01R33/561
CPC分类号： G01R33/565 , G01R33/4824 , G01R33/5616 , G01R33/56518 , G01R33/56554 , G01R33/56572
摘要： In PROPELLER utilizing EPI k-space sampling, phase errors arising primarily from eddy currents can considerably degrade image quality. The phase errors include spatially constant phase errors, spatially linear phase errors, and oblique phase errors. Methods to measure and correct for these phase errors are disclosed. Two or three reference scans are acquired, each reference scan being mutually orthogonal along the orthogonal physical gradient axes in a MRI system. A spatially constant phase error and a spatially linear phase error are determined from each of the reference scans for each relevant physical gradient axis. These phase errors can be used to predict the constant, linear, and oblique phase errors in each blade of an EPI PROPELLER k-space data set. With the known phase errors for each blade, constant, linear, and/or oblique phase correction is applied prior to or during PROPELLER image reconstruction, producing an image with substantially reduced artifacts.

5. 发明授权

US09645211B2 Magnetic resonance imaging using steering-propeller 有权
公开(公告)号：US09645211B2
公开(公告)日：2017-05-09
申请号：US13695159
申请日：2011-04-29
申请人： Xiaohong Joe Zhou
发明人： Xiaohong Joe Zhou
IPC分类号： G01R33/44 , G01R33/28 , G01R33/48 , G01R33/561
CPC分类号： G01R33/44 , G01R33/28 , G01R33/4824 , G01R33/5617
摘要： A GRASE-type PROPELLER sequence called Steer-PROP is disclosed. This sequence exploits a serious of steer blips together with rewinding gradient pulse to traverse k-space. Steer-PROP improves the scan time by a factor of 3 or higher compared to FSE-PROPELLER, provides improved robustness to off-resonance effects compared to EPI-PROPELLER, and addresses a long-standing phase correction problem inherent to GRASE based sequences. Steer-PROP also enables intra-blade, inter-blade, and inter-shot phase errors to be separately determined and independently corrected.

6. 发明申请

US20140111203A1 REDUCING ARTIFACTS IN MAGNETIC RESONANCE IMAGES ACQUIRED USING PROPELLER ECHO PLANAR IMAGING 有权
标题翻译：减少使用螺旋桨ECHO平面成像获得的磁共振图像中的人物
公开(公告)号：US20140111203A1
公开(公告)日：2014-04-24
申请号：US14113044
申请日：2012-04-23
申请人： Xiaohong Joe Zhou
发明人： Xiaohong Joe Zhou
IPC分类号： G01R33/565
CPC分类号： G01R33/565 , G01R33/4824 , G01R33/5616 , G01R33/56518 , G01R33/56554 , G01R33/56572
摘要： In PROPELLER utilizing EPI k-space sampling, phase errors arising primarily from eddy currents can considerably degrade image quality. The phase errors include spatially constant phase errors, spatially linear phase errors, and oblique phase errors. Methods to measure and correct for these phase errors are disclosed. Two or three reference scans are acquired, each reference scan being mutually orthogonal along the orthogonal physical gradient axes in a MRI system. A spatially constant phase error and a spatially linear phase error are determined from each of the reference scans for each relevant physical gradient axis. These phase errors can be used to predict the constant, linear, and oblique phase errors in each blade of an EPI PROPELLER k-space data set. With the known phase errors for each blade, constant, linear, and/or oblique phase correction is applied prior to or during PROPELLER image reconstruction, producing an image with substantially reduced artifacts.
摘要翻译：在使用EPI k空间采样的PROPELLER中，主要由涡流引起的相位误差会显着降低图像质量。相位误差包括空间恒定相位误差，空间线性相位误差和斜相位误差。公开了测量和校正这些相位误差的方法。获取两个或三个参考扫描，每个参考扫描在MRI系统中沿着正交物理梯度轴相互正交。从每个相关物理梯度轴的每个参考扫描确定空间上恒定的相位误差和空间线性相位误差。这些相位误差可用于预测EPI PROPELLER k空间数据集的每个叶片中的常数，线性和倾斜相位误差。利用每个叶片的已知相位误差，在PROPELLER图像重建之前或期间施加恒定，线性和/或倾斜相位校正，产生具有显着减少的伪影的图像。

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