公开(公告)号：US20230346244A1

公开(公告)日：2023-11-02

申请号：US18295826

申请日：2023-04-04

Applicant: GE Precision Healthcare LLC

Inventor： Yanchun Zheng ,  Kun Wang

IPC: A61B5/055 ,  G16H40/63

CPC classification number: A61B5/055 ,  G16H40/63 ,  G16H30/20

Abstract: A magnetic resonance imaging system includes a processor. The processor is configured to acquire a variation of a first system state parameter during a scanning process of the magnetic resonance imaging system, determine, according to the variation of the first system state parameter, a variation of a second system state parameter on the basis of a function relationship between the first system state parameter and the second system state parameter, and correct the magnetic resonance imaging system on the basis of the variation of at least one of the first system state parameter and the second system state parameter.

公开(公告)号：US11540788B2

公开(公告)日：2023-01-03

申请号：US17074849

申请日：2020-10-20

Applicant: GE Precision Healthcare LLC

Inventor： Qingyu Dai ,  Qilin Lu ,  Yaan Ge ,  Kun Wang ,  Longqing Wang

IPC: G06K9/00 ,  A61B6/04 ,  G06N3/02 ,  A61B6/00 ,  G06T7/70 ,  G06T7/00

Abstract: Embodiments of the present invention provide a method for identifying a body position of a detection object in medical imaging, a medical imaging system, and a computer-readable storage medium. The method comprises: receiving an image group by a trained deep learning network, the image group comprising a plurality of pre-scan images in a plurality of directions obtained by pre-scanning a detection object; and outputting body position information of the detection object by the deep learning network.

公开(公告)号：US20220278705A1

公开(公告)日：2022-09-01

申请号：US17580967

申请日：2022-01-21

Applicant: GE Precision Healthcare LLC

Inventor： Weiman Jiang ,  Fan Yang ,  Kun Wang

IPC: H04B1/3827

Abstract: In the present invention, provided are a magnetic resonance imaging system, a method for determining a SAR value of a magnetic resonance imaging system, and a computer-readable storage medium. The system comprises a radio-frequency transmitting coil, configured to receive radio-frequency power from a radio-frequency transmitting link and transmit radio-frequency power required for imaging to a scanned object. The system further comprises a reflection coefficient determining module, a resistance value determining module, and a SAR value determining module. The reflection coefficient determining module is configured to acquire a frequency response of a first input reflection coefficient of the radio-frequency transmitting coil when having no load and a frequency response of a second input reflection coefficient thereof when having the scanned object. The resistance value determining module is configured to determine a resistance value of the radio-frequency transmitting coil on the basis of the frequency response of the first input reflection coefficient, and determine a parallel resistance value of the radio-frequency transmitting coil and the scanned object on the basis of the frequency response of the second input reflection coefficient. The SAR value determining module is configured to calculate a SAR value of the scanned object on the basis of the resistance value of the radio-frequency transmitting coil and the parallel resistance value.

公开(公告)号：US20220026509A1

公开(公告)日：2022-01-27

申请号：US17305912

申请日：2021-07-16

Applicant: GE Precision Healthcare LLC

Inventor： Fan Yang ,  Yanchun Zheng ,  Kun Wang

IPC: G01R33/28 ,  G01R33/54

Abstract: The present invention provides a monitoring method and device for a magnetic resonance imaging system, and a magnetic resonance imaging system. The monitoring method comprises: acquiring a whole body specific absorption rate of a subject under examination; acquiring a ratio between a local region specific absorption rate and the whole body specific absorption rate of the subject under examination on the basis of current parameter information of a local coupling coil in the magnetic resonance imaging system; and calculating the local region specific absorption rate of the subject under examination on the basis of the ratio between the local region specific absorption rate and the whole body specific absorption rate, and the whole body specific absorption rate.

公开(公告)号：US20210123993A1

公开(公告)日：2021-04-29

申请号：US17065058

申请日：2020-10-07

Applicant: GE Precision Healthcare LLC

Inventor： Longqing Wang ,  Weinan Tang ,  Kun Wang ,  Hongbin Wang ,  Yongchuan Lai ,  Jiabin Yao

IPC: G01R33/24 ,  G01R33/54 ,  G01R33/483

Abstract: Embodiments of the present invention provide a magnetic resonance imaging method and system and a computer-readable storage medium. The method comprises: performing pre-scanning, wherein a first sequence and a second sequence are separately performed on a plurality of slices; in the first sequence, two echoes are continuously obtained to respectively obtain first image data and second image data having a first phase offset; in the second sequence, two echoes are continuously obtained to respectively obtain third image data and fourth image data having a second phase offset, the first phase offset and the second phase offset having opposite directions but the same angle; obtaining a plurality of radio-frequency field maps respectively corresponding to the plurality of slices based on the first image data and the second image data, and obtaining a plurality of static magnetic field maps respectively corresponding to the plurality of slices based on at least one of the following two groups: a first image and a third image, and a second image and a fourth image; and calculating formal scanning parameters suitable for a corresponding slice based on at least one of the following two components: each radio-frequency field map, and a corresponding static magnetic field map.

公开(公告)号：US20240183921A1

公开(公告)日：2024-06-06

申请号：US18529200

申请日：2023-12-05

Applicant: GE Precision Healthcare LLC

Inventor： Yaan Ge ,  Liyuan Jin ,  Kun Wang ,  Qingyu Dai ,  Shan Gao

IPC: G01R33/56 ,  G01R33/385 ,  G06T11/00

CPC classification number: G01R33/5608 ,  G01R33/385 ,  G06T11/005

Abstract: Embodiments of the present invention disclose a magnetic resonance system, a magnetic resonance image correction method, and a magnetic resonance imaging method. The magnetic resonance image correction method comprises: separately obtaining main magnetic field intensity distribution information and gradient magnetic field information of a magnetic resonance system, the gradient magnetic field information comprising one or more among X-axis gradient magnetic field information, Y-axis gradient magnetic field information, and Z-axis gradient magnetic field information; obtaining a first correction coefficient based on the main magnetic field intensity distribution information; obtaining, based on one or more among the X-axis gradient magnetic field information, the Y-axis gradient magnetic field information, and the Z-axis gradient magnetic field information, one or more corresponding second correction coefficients; and, correcting image data obtained by means of the magnetic resonance system based on the first correction coefficient and the one or more second correction coefficients.

公开(公告)号：US20230314541A1

公开(公告)日：2023-10-05

申请号：US18182857

申请日：2023-03-13

Applicant: GE Precision Healthcare LLC

Inventor： Liyuan Jin ,  Yaan Ge ,  Qingyu Dai ,  Kun Wang

IPC: G01R33/56

CPC classification number: G01R33/5608

Abstract: A method for determining a radio frequency power compensation parameter includes: using a plurality of scan sequences to scan a phantom in a plurality of slice positions by using a plurality of excitation frequencies; acquiring a plurality of magnetic resonance signals from the phantom corresponding to the plurality of slice positions and the plurality of excitation frequencies; and determining, according to the plurality of magnetic resonance signals, radio frequency power compensation parameters corresponding to respective slice positions in a three-dimensional space at respective excitation frequencies.

公开(公告)号：US20230036285A1

公开(公告)日：2023-02-02

申请号：US17844288

申请日：2022-06-20

Applicant: GE Precision Healthcare LLC

Inventor： Fuqiang Chen ,  Kun Wang ,  Bohao Li ,  Liya Ma

IPC: G06T5/50 ,  G06T7/00 ,  G06T5/00 ,  G06T7/70 ,  G01R33/56 ,  A61B5/055 ,  A61B5/00

Abstract: Provided in the present invention are a magnetic resonance imaging system and method, and a computer-readable storage medium. The method comprises: performing a medical scan of a subject and acquiring a first medical image having a first noise interference artifact, and performing an additional scan of the subject to acquire a second medical image, wherein the second medical image has a second noise interference artifact, and the location mapping of the second noise interference artifact in the first medical image is symmetrical to the location of the first noise interference artifact relative to a pixel center of the first medical image; and performing synthesis-related processing on the first medical image and the second medical image to acquire a post-processed image with reduced noise interference artifacts.

公开(公告)号：US20220381864A1

公开(公告)日：2022-12-01

申请号：US17738219

申请日：2022-05-06

Applicant: GE Precision Healthcare LLC

Inventor： Yaan Ge ,  Liya Ma ,  Sheng Tong ,  Qingyu Dai ,  Kun Wang

IPC: G01R33/567

Abstract: The present application provides a breathing and motion monitoring method for an MRI system, an MRI system and method, and a storage medium. The MRI includes a scanner, a controller, and a signal processor. The scanner includes a radio-frequency transmit chain and a radio-frequency transmit coil, and an object under detection is positioned relative to the radio-frequency transmit coil. The controller is configured to control the scanner to perform a scanning sequence on the object under detection to acquire image data. The scanning sequence includes a radio-frequency excitation stage, a signal acquisition stage, and an idle stage. In the radio-frequency excitation stage, the radio-frequency transmit chain transmits a first radio-frequency pulse to the radio-frequency transmit coil. The signal processor is configured to acquire scattering parameters of the radio-frequency transmit coil in real time, wherein in the radio-frequency excitation stage, a first radio-frequency power signal detected on a line between the radio-frequency transmit chain and the radio-frequency transmit coil is acquired in real time, and the scattering parameters are acquired on the basis of the signal; and at least one of breathing information and motion information of the object under detection is acquired on the basis of the scattering parameters.

公开(公告)号：US20210298628A1

公开(公告)日：2021-09-30

申请号：US17202180

申请日：2021-03-15

Applicant: GE Precision Healthcare LLC

Inventor： Liyuan Jin ,  Yaan Ge ,  Qilin Lu ,  Qingyu Dai ,  Kun Wang

IPC: A61B5/055 ,  G01R33/54 ,  G01R33/44

Abstract: Embodiments of the present invention provide a magnetic resonance scanning method and system and a computer-readable storage medium. The method comprises: when an imaging volume of an object is at a current position, performing a current imaging scan on the imaging volume based on a predicted overall BO field map at the current position.