公开(公告)号：US20190178967A1

公开(公告)日：2019-06-13

申请号：US16212889

申请日：2018-12-07

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jia Guo ,  Yongchuan Lai ,  Xuan Liu

IPC: G01R33/567 ,  G01R33/56

Abstract: Embodiments of the present invention provide a motion tracking method for MR imaging, comprising: exciting an imaging volume of a detected object; shifting a frequency of an FID signal generated by the imaging volume relative to a center frequency as a position of the imaging volume changes; acquiring the FID signal and calculating a frequency shift of the acquired FID signal relative to the center frequency for multiple times; and obtaining a motion trajectory of the detected object in accordance with a change of the frequency shift as a function of time.

公开(公告)号：US20190004135A1

公开(公告)日：2019-01-03

申请号：US16020656

申请日：2018-06-27

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jia Guo ,  Yongchuan Lai ,  Tongzhou Wang ,  Hongbin Wang

IPC: G01R33/54 ,  G01R33/48 ,  G01R33/00

Abstract: Methods and apparatuses for processing MR signal are disclosed herein. An exemplary method comprises: when acquired K-space signals are amplified, assigning a first amplification gain to signals within a first signal region in the K space, and assigning a second amplification gain to signals within a second signal region in the K space.

公开(公告)号：US20170061615A1

公开(公告)日：2017-03-02

申请号：US15252721

申请日：2016-08-31

Applicant: General Electric Company

Inventor： Jia Guo ,  Yongchuan Lai ,  Xiaocheng Wei ,  Yi Hu

IPC: G06T7/00 ,  A61B5/00 ,  A61B5/055

CPC classification number: A61B5/4561 ,  A61B5/055 ,  A61B5/447 ,  A61B2576/00 ,  G06T7/73 ,  G06T2207/10081 ,  G06T2207/10088 ,  G06T2207/30196

Abstract: The present invention provides an image identification method, a magnetic resonance imaging method and an imaging apparatus. Said imaging apparatus comprises: a scanning device configured to scan a target object to obtain projection images of the target object along different directions; a processing unit configured to process the obtained projection images to obtain posture feature information of the target object; a posture determining unit configured to determine a posture of the target object according to the obtained posture feature information. Therefore, the posture of the target object may be automatically recognized during the imaging, and thus the imaging operation is simplified, improving efficiency and reliability of the imaging operation.

Abstract translation: 本发明提供一种图像识别方法，磁共振成像方法和成像装置。 所述成像装置包括：扫描装置，被配置为扫描目标对象以获得沿着不同方向的目标对象的投影图像; 处理单元，被配置为处理所获得的投影图像以获得所述目标对象的姿势特征信息; 姿势确定单元，被配置为根据获得的姿势特征信息来确定目标对象的姿势。 因此，可以在成像期间自动识别目标物体的姿势，因此简化了成像操作，提高了成像操作的效率和可靠性。

公开(公告)号：US11002817B2

公开(公告)日：2021-05-11

申请号：US16212889

申请日：2018-12-07

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jia Guo ,  Yongchuan Lai ,  Xuan Liu

IPC: G01R33/60 ,  G01R33/567 ,  G01R33/56

Abstract: Embodiments of the present invention provide a motion tracking method for MR imaging, comprising: exciting an imaging volume of a detected object; shifting a frequency of an FID signal generated by the imaging volume relative to a center frequency as a position of the imaging volume changes; acquiring the FID signal and calculating a frequency shift of the acquired FID signal relative to the center frequency for multiple times; and obtaining a motion trajectory of the detected object in accordance with a change of the frequency shift as a function of time.

公开(公告)号：US10799183B2

公开(公告)日：2020-10-13

申请号：US16183631

申请日：2018-11-07

Applicant: General Electric Company

Inventor： Nan Cao ,  Yongchuan Lai ,  Shiyu Li ,  Ting Zhang

IPC: A61B5/00 ,  G01R33/56 ,  G01R33/54 ,  A61B5/055 ,  G06T7/00 ,  G06T7/73

Abstract: Various methods and systems are provided for scanning an image subject along a scan axis. The method includes stitching sectional datasets acquired from different anatomical sections of the image subject based on locations of a landmark in the sectional datasets.

公开(公告)号：US10768252B2

公开(公告)日：2020-09-08

申请号：US16169533

申请日：2018-10-24

Applicant: General Electric Company

Inventor： Lisha Nie ,  Yongchuan Lai ,  Xuan Liu

IPC: G01R33/24 ,  G01R33/48 ,  G01R33/561

Abstract: Various methods and systems are provided for acquiring k-space data for magnetic resonance imaging. In one example, after applying a phase encoding gradient, the k-space data of a phase angle is acquired while applying a frequency encoding gradient. An amplitude of the phase encoding gradient and a duration of the phase encoding gradient determined based on each and every of a phase angle of the phase encoding line and a duration of the frequency encoding gradient.

公开(公告)号：US10690742B2

公开(公告)日：2020-06-23

申请号：US16361913

申请日：2019-03-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Lisha Nie ,  Yongchuan Lai ,  Tongzhou Wang ,  Tengfei Wang

IPC: G01R33/58 ,  G01R33/385 ,  G01R33/48 ,  G01R33/54 ,  G01R33/56

Abstract: Methods and apparatuses for calibrating a center frequency of MR and an MRI system are disclosed herein. An exemplary method comprises applying a first set of gradient fields, receiving data information acquired by an RF coil and generating a first image; applying a second set of gradient fields in directions different than those of the first set of gradient fields, receiving data information acquired by the RF coil and generating a second image; calculating a shift of the center frequency based on the first image and the second image; and correcting the center frequency based on the shift of the center frequency.

公开(公告)号：US20170059681A1

公开(公告)日：2017-03-02

申请号：US15252727

申请日：2016-08-31

Applicant: General Electric Company

Inventor： Yongchuan Lai ,  Moran Wei ,  Xiaoxi Mao

IPC: G01R33/561 ,  G01R33/563 ,  G01R33/385

CPC classification number: G01R33/56341 ,  G01R33/3852

Abstract: The present invention provides an apparatus and method for controlling a pulse sequence of a magnetic resonance (MR) imaging system, the MR imaging system comprising a radio frequency magnetic field coil and a gradient magnetic field coil, the apparatus for controlling a pulse sequence of the MR imaging system comprising a radio frequency driving unit and a gradient driving unit. The gradient driving unit is used for applying a first motion probing gradient (MPG) pulse and a second MPG pulse to the gradient magnetic field coil successively. The radio frequency driving unit is used for applying a radio frequency excitation pulse to the radio frequency magnetic field coil before the first MPG pulse is applied, and for applying a first 90-degree radio frequency refocusing pulse, a 180-degree radio frequency refocusing pulse and a second 90-degree radio frequency refocusing pulse to the radio frequency magnetic field coil successively between a time when the first MPG pulse is applied and a time when the second MPG pulse is applied.

Abstract translation: 本发明提供了一种用于控制磁共振（MR）成像系统的脉冲序列的装置和方法，该MR成像系统包括射频磁场线圈和梯度磁场线圈，该装置用于控制脉冲序列 MR成像系统包括射频驱动单元和梯度驱动单元。 梯度驱动单元用于连续地向梯度磁场线圈施加第一运动探测梯度（MPG）脉冲和第二MPG脉冲。 射频驱动单元用于在施加第一MPG脉冲之前向射频磁场线圈施加射频激励脉冲，并且用于施加第一90度射频重聚焦脉冲，180度射频重聚焦脉冲 以及在施加第一MPG脉冲的时间和施加第二MPG脉冲的时间之间，连续向射频磁场线圈施加第二90度射频再聚焦脉冲。

公开(公告)号：US20200138382A1

公开(公告)日：2020-05-07

申请号：US16183631

申请日：2018-11-07

Applicant: General Electric Company

Inventor： Nan Cao ,  Yongchuan Lai ,  Shiyu Li ,  Ting Zhang

IPC: A61B5/00 ,  G01R33/56 ,  G01R33/54 ,  A61B5/055 ,  G06T7/00 ,  G06T7/73

Abstract: Various methods and systems are provided for scanning an image subject along a scan axis. The method includes stitching sectional datasets acquired from different anatomical sections of the image subject based on locations of a landmark in the sectional datasets.

公开(公告)号：US20200132793A1

公开(公告)日：2020-04-30

申请号：US16169533

申请日：2018-10-24

Applicant: General Electric Company

Inventor： Lisha Nie ,  Yongchuan Lai ,  Xuan Liu

IPC: G01R33/48 ,  G01R33/561

Abstract: Various methods and systems are provided for acquiring k-space data for magnetic resonance imaging. In one example, after applying a phase encoding gradient, the k-space data of a phase angle is acquired while applying a frequency encoding gradient. An amplitude of the phase encoding gradient and a duration of the phase encoding gradient determined based on each and every of a phase angle of the phase encoding line and a duration of the frequency encoding gradient.