公开(公告)号：US20060233454A1

公开(公告)日：2006-10-19

申请号：US11281523

申请日：2005-11-16

申请人： Hu Cheng ,  Feng Huang

发明人： Hu Cheng ,  Feng Huang

IPC分类号： G06K9/40

CPC分类号： G01R33/56563 ,  G01R33/5608 ,  G01R33/5659 ,  G06K9/40 ,  G06T5/005 ,  G06T2207/30004

摘要： The subject invention pertains to a method of image intensity correction. The subject invention can utilize extrapolation for image intensity correction. The use of extrapolation can reduce the artifacts during intensity correction as compared to traditional methods of intensity correction. The extrapolation can be combined with, for example, homomorphic filtering methods, parametric estimation techniques, wavelet based method, and/or Gaussian smooth method, in order to reduce the artifacts generated by these methods and improve the quality of correction. The implementation of image extrapolation in accordance with a specific embodiment can utilize closest point method. The subject method can also use adaptive smoothing for image intensity correction. In an embodiment, the use of gradient weighted smoothing method can reduce, or eliminate, over-smoothing of bright spot regions. In a specific embodiment, the subject method can utilize gradient weighted partial differential equation (PDE) smoothing.

摘要翻译： 本发明涉及一种图像强度校正方法。 本发明可以利用外推图像强度校正。 与传统的强度校正方法相比，使用外推法可以减少强度校正过程中的伪影。 外推可以与例如同态滤波方法，参数估计技术，基于小波的方法和/或高斯平滑方法组合，以便减少由这些方法产生的伪像并提高校正的质量。 根据具体实施例的图像外推的实现可以利用最近的点法。 主题方法还可以使用自适应平滑来进行图像强度校正。 在一个实施例中，使用梯度加权平滑方法可以减少或消除亮点区域的过度平滑。 在具体实施例中，本方法可以利用梯度加权偏微分方程（PDE）平滑。

公开(公告)号：US20060233455A1

公开(公告)日：2006-10-19

申请号：US11405317

申请日：2006-04-17

申请人： Hu Cheng ,  Feng Huang

发明人： Hu Cheng ,  Feng Huang

IPC分类号： G06K9/40

CPC分类号： G01R33/56563 ,  G01R33/5608 ,  G01R33/5659 ,  G06K9/40 ,  G06T5/005 ,  G06T2207/30004

摘要： The subject invention pertains to a method of image intensity correction. The subject invention can utilize extrapolation for image intensity correction. The use of extrapolation can reduce the artifacts during intensity correction as compared to traditional methods of intensity correction. The extrapolation can be combined with, for example, homomorphic filtering methods, parametric estimation techniques, wavelet based method, and/or Gaussian smooth method, in order to reduce the artifacts generated by these methods and improve the quality of correction. The implementation of image extrapolation in accordance with a specific embodiment can utilize closest point method. The subject method can also use adaptive smoothing for image intensity correction. In an embodiment, the use of gradient weighted smoothing method can reduce, or eliminate, over-smoothing of bright spot regions. In a specific embodiment, the subject method can utilize gradient weighted partial differential equation (PDE) smoothing.

公开(公告)号：US20050253580A1

公开(公告)日：2005-11-17

申请号：US11128731

申请日：2005-05-13

申请人： Feng Huang ,  Hu Cheng ,  G. Duensing

发明人： Feng Huang ,  Hu Cheng ,  G. Duensing

IPC分类号： G01R33/54 ,  G01R33/56 ,  G01V3/00

CPC分类号： G01R33/54 ,  G01R33/56 ,  G01R33/5608

摘要： The subject invention pertains to a method for magnetic resonance imaging (MRI) involving the acquisition of pseudo-polar K-space data and creation of an MRI image from the pseudo-polar K-space data. In an embodiment, the subject method can incorporate a scan scheme for acquiring pseudo-polar K-space data and corresponding reconstruction technique. Advantageously, the subject method can result in reduced motion artifact in dynamic MRI with short acquisition time and short reconstruction time. In a specific embodiment, the subject method can incorporate a reconstruction method utilizing Fractional FFT in MRI. The subject method can allow the acquisition of pseudo-polar K-space data. In a specific embodiment, the acquisition of the pseudo-polar is accomplished by one shot. Other acquisition techniques can also be utilized in accordance with the subject invention. In an embodiment, the pseudo-polar K-space data can lie at the origin of K-space and on N linearly growing concentric squares, with N≦2, where the distance between adjacent concentric squares is the same as the distance from the origin to the innermost square. The K-space data on the N concentric squares are equally spaced from adjacent data points on the same square, including data points at the corners of each square.

摘要翻译： 本发明涉及一种用于磁共振成像（MRI）的方法，其涉及从伪极坐标K空间数据获取伪极坐标K空间数据和创建MRI图像。 在一个实施例中，本发明方法可以包括用于获取伪极坐标K空间数据和对应的重建技术的扫描方案。 有利地，本方法可以导致动态MRI中的运动伪影减少，获取时间短和重建时间短。 在一个具体实施例中，本发明方法可以结合利用MRI中的分数FFT的重建方法。 主题方法可以允许获取伪极化K空间数据。 在具体实施例中，伪极性的获取通过一次镜头来实现。 根据本发明也可以使用其他采集技术。 在一个实施例中，伪极化K空间数据可以位于K空间的原点和N个线性增长的同心平方上，其中N <= 2，其中相邻同心正方形之间的距离与距离 起源于最内层的广场。 N个同心圆弧上的K空间数据与同一平方的相邻数据点相等间隔，包括每个正方形角的数据点。

公开(公告)号：US20070088211A1

公开(公告)日：2007-04-19

申请号：US11452605

申请日：2006-06-13

申请人： Hu Cheng ,  Qun Zhao ,  William Edelstein ,  G. Duensing

发明人： Hu Cheng ,  Qun Zhao ,  William Edelstein ,  G. Duensing

IPC分类号： A61B5/05

CPC分类号： A61B5/055

摘要： The subject invention relates to a method and apparatus for producing stimulated MRI data. In an embodiment, a remote-controlled “smart phantom” can produce simulated data. The simulated data can be acquired from a MRI system. The subject device can generate control signals and send the generated control signals to secondary coils/probes placed in the subject smart phantom. The control signals determine the current flow in the secondary coils/probes, which act as local spin magnetization amplifiers and thus produce regions of variable contrast to noise ratio. The control signals can be generated with various parameters, such as BOLD models, different levels of contrast-to-noise ratio (CNR), signal intensities, and physiological signals. Comparisons can be made with the widely-used simulated data by computers. Validation of the subject smart phantom can be performed with both theoretical analysis and data of human subjects.

摘要翻译： 本发明涉及用于产生刺激的MRI数据的方法和装置。 在一个实施例中，远程控制的“智能幻影”可以产生模拟数据。 可以从MRI系统获取模拟数据。 主体装置可以产生控制信号，并将产生的控制信号发送到放置在主体智能幻影中的次级线圈/探头。 控制信号确定次级线圈/探头中的电流，其作为局部自旋磁化放大器，从而产生可变对比度噪声比的区域。 控制信号可以用诸如BOLD模型，不同等级的对比噪声比（CNR），信号强度和生理信号等各种参数产生。 可以用计算机广泛使用的模拟数据进行比较。 可以通过理论分析和人类受试者的数据进行主体智能幻影的验证。

公开(公告)号：US07215122B2

公开(公告)日：2007-05-08

申请号：US10957822

申请日：2004-10-04

申请人： Qun Zhao ,  G. Randy Duensing ,  Hu Cheng ,  William A. Edelstein

发明人： Qun Zhao ,  G. Randy Duensing ,  Hu Cheng ,  William A. Edelstein

IPC分类号： G01V3/00

CPC分类号： G01R33/32 ,  G01R33/4806 ,  G01R33/58

摘要： The subject invention relates to a method and apparatus for producing stimulated MRI data. In an embodiment, a remote-controlled “smart phantom” can produce simulated data. The simulated data can be acquired from a MRI system. The subject device can generate control signals and send the generated control signals to secondary coils/probes placed in the subject smart phantom. The control signals determine the current flow in the secondary coils/probes, which act as local spin magnetization amplifiers and thus produce regions of variable contrast to noise ratio. The control signals can be generated with various parameters, such as BOLD models, different levels of contrast-to-noise ratio (CNR), signal intensities, and physiological signals. Comparisons can be made with the widely-used simulated data by computers. Validation of the subject smart phantom can be performed with both theoretical analysis and data of human subjects.

摘要翻译： 本发明涉及一种用于产生模拟MRI数据的方法和装置。 在一个实施例中，远程控制的“智能幻影”可以产生模拟数据。 可以从MRI系统获取模拟数据。 主体装置可以产生控制信号，并将产生的控制信号发送到放置在主体智能幻影中的次级线圈/探头。 控制信号确定次级线圈/探头中的电流，其作为局部自旋磁化放大器，从而产生可变对比度噪声比的区域。 控制信号可以用诸如BOLD模型，不同等级的对比噪声比（CNR），信号强度和生理信号等各种参数产生。 可以用计算机广泛使用的模拟数据进行比较。 可以通过理论分析和人类受试者的数据进行主体智能幻影的验证。

公开(公告)号：US20050110490A1

公开(公告)日：2005-05-26

申请号：US10957822

申请日：2004-10-04

申请人： Qun Zhao ,  G. Duensing ,  Hu Cheng ,  William Edelstein

发明人： Qun Zhao ,  G. Duensing ,  Hu Cheng ,  William Edelstein

IPC分类号： G01R33/32 ,  G01R33/58 ,  G01V3/00 ,  A61B5/05

CPC分类号： G01R33/32 ,  G01R33/4806 ,  G01R33/58

摘要： The subject invention relates to a method and apparatus for producing stimulated MRI data. In an embodiment, a remote-controlled “smart phantom” can produce simulated data. The simulated data can be acquired from a MRI system. The subject device can generate control signals and send the generated control signals to secondary coils/probes placed in the subject smart phantom. The control signals determine the current flow in the secondary coils/probes, which act as local spin magnetization amplifiers and thus produce regions of variable contrast to noise ratio. The control signals can be generated with various parameters, such as BOLD models, different levels of contrast-to-noise ratio (CNR), signal intensities, and physiological signals. Comparisons can be made with the widely-used simulated data by computers. Validation of the subject smart phantom can be performed with both theoretical analysis and data of human subjects.

摘要翻译： 本发明涉及一种用于产生模拟MRI数据的方法和装置。 在一个实施例中，远程控制的“智能幻影”可以产生模拟数据。 可以从MRI系统获取模拟数据。 主体装置可以产生控制信号，并将产生的控制信号发送到放置在主体智能幻影中的次级线圈/探头。 控制信号确定次级线圈/探头中的电流，其作为局部自旋磁化放大器，从而产生可变对比度噪声比的区域。 控制信号可以用诸如BOLD模型，不同等级的对比噪声比（CNR），信号强度和生理信号等各种参数产生。 可以用计算机广泛使用的模拟数据进行比较。 可以通过理论分析和人类受试者的数据进行主体智能幻影的验证。

公开(公告)号：US5918702A

公开(公告)日：1999-07-06

申请号：US856150

申请日：1997-05-14

申请人： Bao Cheng ,  Hu Cheng

发明人： Bao Cheng ,  Hu Cheng

IPC分类号： B05C17/005 ,  F16N3/12 ,  F16N11/02 ,  F16N21/00

CPC分类号： F16N11/02 ,  B05C17/00569 ,  F16N3/12

摘要： A grease gun device includes a cock body having a piston cylinder and a slot joint. The piston cylinder also includes a seal washer opening and an outlet opening spatially disposed from the seal washer opening. A piston is reciprocatingly engaged in the piston cylinder for moving grease from the slot joint to the outlet opening, wherein a valve mechanism selectively allows grease from the piston cylinder to pass through the outlet opening. A grease supply barrel having a grease opening is engaged with the cock body to supply grease to the piston cylinder, and a sealed piston closes the other end of the grease supply barrel. A jacket is mounted about the grease barrel and connected with the cock body, wherein the diameter of an outermost periphery of the grease barrel is less than an inside diameter of the jacket, such that the grease barrel does not overlap the jacket. A rear cover engages the far end of the jacket. In use, moving the piston in a first direction in the piston cylinder pushes grease through the outlet opening, and moving the piston in a second direction in the piston cylinder induces a vacuum pressure in the piston cylinder, which moves grease from the grease barrel, through the slot joint, and into the piston cylinder. A seal washer disposed in the seal washer opening sealingly engages the piston and helps maintain the vacuum pressure in the piston cylinder.

摘要翻译： 油枪装置包括具有活塞气缸和狭槽接头的旋塞体。 活塞气缸还包括密封垫圈开口和从密封垫圈开口空间设置的出口开口。 活塞往复接合在活塞缸中，用于将油脂从槽接头移动到出口，其中阀机构选择性地允许来自活塞缸的油脂通过出口。 具有油脂开口的润滑脂供给筒与旋塞体接合以向活塞气缸供给润滑脂，并且密封活塞封闭供油筒的另一端。 护套安装在油脂筒周围并与旋塞阀体连接，其中油脂筒的最外周的直径小于护套的内径，使得油脂桶不与外套重叠。 后盖接合护套的远端。 在使用中，在活塞缸中沿着第一方向移动活塞通过出口开启润滑脂，并且使活塞沿活塞气缸的第二方向移动，使得活塞气缸中的真空压力从油脂筒移动， 通过槽缝，进入活塞缸。 设置在密封垫圈开口中的密封垫圈密封地接合活塞并帮助维持活塞缸中的真空压力。