Patents by Inventor Yongchuan Lai

Yongchuan Lai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240410963
    Abstract: Embodiments of the present application provide a magnetic resonance scanning and imaging method, and a magnetic resonance imaging system. The method includes: determining a pulse to be adjusted in a scan sequence, the pulse to be adjusted including a first radio-frequency pulse and a first gradient pulse applied along with the first radio-frequency pulse; determining an adjustment factor based on the first gradient pulse and a minimum repetition time related to a specific absorption rate of radio-frequency energy; adjusting the scan sequence based on the adjustment factor; and, using the adjusted scan sequence, performing a diagnostic scan on a site to be examined, to obtain a magnetic resonance image.
    Type: Application
    Filed: June 7, 2024
    Publication date: December 12, 2024
    Inventors: Lei Gao, Hanbei Zhang, Wei Chang, Huijing Zhou, Yongchuan Lai
  • Publication number: 20240353516
    Abstract: A magnetic resonance scanning and imaging method and a magnetic resonance imaging system are provided. The method includes: performing a reference scan on a site to be examined, acquiring reference scan data corresponding to a portion of slice positions among a plurality of slice positions, and generating, according to the reference scan data, a phase correction coefficient corresponding to each slice position among the plurality of slice positions; and performing, according to the phase correction coefficients, a diagnostic scan on the site to be examined to acquire a magnetic resonance image.
    Type: Application
    Filed: April 18, 2024
    Publication date: October 24, 2024
    Inventors: Lei Gao, Yongchuan Lai
  • Publication number: 20240345195
    Abstract: A magnetic resonance imaging system and method is provided. The magnetic resonance imaging method comprises: in a single signal acquisition, applying a plurality of diffusion-weighted imaging sequences in a plurality of diffusion directions, respectively, to acquire a plurality of k-space data sets. Each diffusion-weighted imaging sequence comprising a pre-dephasing gradient pulse and a plurality of phase encoding gradient pulses applied after the pre-dephasing gradient pulse, and the pre-dephasing gradient pulses in the plurality of diffusion-weighted imaging sequences, when sorted according to area values, successively having a first standard area difference determined on the basis of the number of the plurality of diffusion directions. The method further includes performing data fusion processing on the plurality of k-space data sets in the single signal acquisition to obtain a magnetic resonance image.
    Type: Application
    Filed: April 10, 2024
    Publication date: October 17, 2024
    Inventors: Lei Gao, Yongchuan Lai
  • Patent number: 12105170
    Abstract: A magnetic resonance imaging method, a magnetic resonance imaging system, and a computer-readable storage medium are provided. The magnetic resonance imaging method comprises: acquiring a plurality of portions of a k-space by using a plurality of sets of imaging sequences to obtain a plurality of k-space data sets, each set of imaging sequences comprising a pre-dephasing gradient pulse and a plurality of phase encoding gradients applied after the pre-dephasing gradient pulse, wherein the pre-dephasing gradient pulses in the plurality of sets of imaging sequences have a standard area difference in order when sorted according to the sizes of area values, and the standard area difference is 2/N of the area of any phase encoding gradient, where N is the number of sets of the plurality of sets of imaging sequences; respectively reconstructing a magnetic resonance image from each of the plurality of k-space data sets; and processing the plurality of k-space data sets to obtain a magnetic resonance image.
    Type: Grant
    Filed: November 17, 2022
    Date of Patent: October 1, 2024
    Assignee: GE Precision Healthcare LLC
    Inventors: Lei Gao, Yongchuan Lai
  • Publication number: 20240298912
    Abstract: A magnetic resonance scanning and imaging method, and a magnetic resonance imaging system is presented. The method includes: according to a first correspondence between a blood flow rate and a spatial saturation band parameter, determining a first spatial saturation band parameter corresponding to a blood flow rate of a site to be examined; and by using a scan sequence related to the first spatial saturation band parameter, scanning the site to be examined, to acquire a magnetic resonance image of the site to be examined.
    Type: Application
    Filed: March 6, 2024
    Publication date: September 12, 2024
    Inventors: Ting Zhang, Yongchuan Lai, Wei Chang, Teresa Weng, Jia Guo
  • Patent number: 12044760
    Abstract: A magnetic resonance imaging system and method, and a computer-readable storage medium are provided. The magnetic resonance imaging method includes: acquiring a plurality of k-space data sets by using a plurality of imaging sequences, each imaging sequence comprising a pre-phase-dispersion gradient pulse and a plurality of phase encoding gradients applied after the pre-phase-dispersion gradient pulse, wherein the pre-phase-dispersion gradient pulses of the plurality of imaging sequences have a standard area difference therebetween when ordered according to area values; respectively reconstructing magnetic resonance images from the respective k-space data sets; and averaging amplitudes of the magnetic resonance images to generate a magnetic resonance image of an average amplitude.
    Type: Grant
    Filed: November 17, 2022
    Date of Patent: July 23, 2024
    Assignee: GE Precision Healthcare LLC
    Inventors: Lei Gao, Hua Li, Xuan Liu, Yongchuan Lai, Jiabin Yao
  • Patent number: 12045956
    Abstract: A magnetic resonance (MR) imaging method of correcting nonuniformity in diffusion-weighted (DW) MR images of a subject is provided. The method includes applying a DW pulse sequence along a plurality of diffusion directions with one or more numbers of excitations (NEX), and acquiring a plurality of DW MR images of the subject along the plurality of diffusion directions with the one or more NEX. The method also includes deriving a reference image and a base image based on the plurality of DW MR images, generating a nonuniformity factor image based on the reference image and the base image, and combining the plurality of DW MR images into a combined image. The method also includes correcting nonuniformity of the combined image using the nonuniformity factor image, and outputting the corrected image.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: July 23, 2024
    Assignee: GE PRECISION HEALTHCARE LLC
    Inventors: Lei Gao, Juan Gao, Gaohong Wu, Yongchuan Lai
  • Publication number: 20240219499
    Abstract: Provided in the present invention are a magnetic resonance imaging system and method. The magnetic resonance imaging method comprises: performing m NEXs, wherein in each NEX, a plurality of fat suppression pulses are applied, each of the plurality of fat suppression pulses has thereafter m gradient recalled echo sequences, and each NEX acquires q groups of initial image data, where q=m*n, n is the number of fat suppression pulses applied in each NEX, n is greater than 1, and m is greater than 1; and reconstructing a magnetic resonance image on the basis of at least a portion of the initial image data acquired in the m NEXs.
    Type: Application
    Filed: December 11, 2023
    Publication date: July 4, 2024
    Inventors: Hanbei Zhang, Yongchuan Lai, Wei Chang
  • Patent number: 11821969
    Abstract: The present disclosure relates to an MRI system and a method and device for determining a waveform of oblique scanning. Specifically, provided are a magnetic resonance imaging system, a method and device for determining a gradient waveform of oblique scanning, and a computer-readable storage medium.
    Type: Grant
    Filed: August 19, 2022
    Date of Patent: November 21, 2023
    Assignee: GE Precision Healthcare LLC
    Inventors: Pengshuai Wang, Xuan Liu, Yongchuan Lai
  • Publication number: 20230168324
    Abstract: A magnetic resonance imaging method, a magnetic resonance imaging system, and a computer-readable storage medium are provided. The magnetic resonance imaging method comprises: acquiring a plurality of portions of a k-space by using a plurality of sets of imaging sequences to obtain a plurality of k-space data sets, each set of imaging sequences comprising a pre-dephasing gradient pulse and a plurality of phase encoding gradients applied after the pre-dephasing gradient pulse, wherein the pre-dephasing gradient pulses in the plurality of sets of imaging sequences have a standard area difference in order when sorted according to the sizes of area values, and the standard area difference is 2/N of the area of any phase encoding gradient, where N is the number of sets of the plurality of sets of imaging sequences; respectively reconstructing a magnetic resonance image from each of the plurality of k-space data sets; and processing the plurality of k-space data sets to obtain a magnetic resonance image.
    Type: Application
    Filed: November 17, 2022
    Publication date: June 1, 2023
    Inventors: Lei Gao, Yongchuan Lai
  • Patent number: 11619692
    Abstract: Embodiments of the present invention provide a method for acquiring and processing magnetic resonance data, a magnetic resonance imaging system and method, and a computer-readable storage medium. The method for acquiring and processing magnetic resonance data comprises: populating, to a K-space, a plurality of sets of echo data acquired from a plurality of excitations of a tissue to be imaged, wherein at least two of the plurality of sets of echo data have opposite K-space populating orders; and reconstructing an image based on the echo data populated to the K-space.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: April 4, 2023
    Assignee: GE Precision Healthcare LLC
    Inventors: Nan Cao, Yongchuan Lai
  • Publication number: 20230080264
    Abstract: The present disclosure relates to an MRI system and a method and device for determining a waveform of oblique scanning. Specifically, provided are a magnetic resonance imaging system, a method and device for determining a gradient waveform of oblique scanning, and a computer-readable storage medium.
    Type: Application
    Filed: August 19, 2022
    Publication date: March 16, 2023
    Inventors: Pengshuai Wang, Xuan Liu, Yongchuan Lai
  • Patent number: 11543484
    Abstract: A magnetic resonance (MR) imaging method of correcting phase errors is provided. The method includes applying, by an MR system, a pulse sequence to acquire the precorrection MR image. The method also includes acquiring, by the MR system, reference k-space data having a field of view (FOV) in a phase-encoding direction that is twice or more greater than an FOV of the precorrection MR image in the phase-encoding direction, wherein the reference k-space data and MR signals of the precorrection MR image are acquired with the same type of pulse sequences. The method further includes splitting the reference k-space data into first k-space data and second k-space data, generating a phase error map based on the first k-space data and the second k-space data, generating a phase-corrected image of the precorrection MR image based on the phase error map, and outputting the phase-corrected image.
    Type: Grant
    Filed: June 18, 2021
    Date of Patent: January 3, 2023
    Assignee: GE PRECISION HEALTHCARE LLC
    Inventors: Lei Gao, Hua Li, Ting Zhang, Yongchuan Lai
  • Publication number: 20220404447
    Abstract: A magnetic resonance (MR) imaging method of correcting phase errors is provided. The method includes applying, by an MR system, a pulse sequence to acquire the precorrection MR image. The method also includes acquiring, by the MR system, reference k-space data having a field of view (FOV) in a phase-encoding direction that is twice or more greater than an FOV of the precorrection MR image in the phase-encoding direction, wherein the reference k-space data and MR signals of the precorrection MR image are acquired with the same type of pulse sequences. The method further includes splitting the reference k-space data into first k-space data and second k-space data, generating a phase error map based on the first k-space data and the second k-space data, generating a phase-corrected image of the precorrection MR image based on the phase error map, and outputting the phase-corrected image.
    Type: Application
    Filed: June 18, 2021
    Publication date: December 22, 2022
    Inventors: Lei Gao, Hua Li, Ting Zhang, Yongchuan Lai
  • Publication number: 20220392035
    Abstract: A magnetic resonance (MR) imaging method of correcting nonuniformity in diffusion-weighted (DW) MR images of a subject is provided. The method includes applying a DW pulse sequence along a plurality of diffusion directions with one or more numbers of excitations (NEX), and acquiring a plurality of DW MR images of the subject along the plurality of diffusion directions with the one or more NEX. The method also includes deriving a reference image and a base image based on the plurality of DW MR images, generating a nonuniformity factor image based on the reference image and the base image, and combining the plurality of DW MR images into a combined image. The method also includes correcting nonuniformity of the combined image using the nonuniformity factor image, and outputting the corrected image.
    Type: Application
    Filed: June 4, 2021
    Publication date: December 8, 2022
    Inventors: Lei Gao, Juan Gao, Gaohong Wu, Yongchuan Lai
  • Publication number: 20220206097
    Abstract: Provided in embodiments of the present invention are a magnetic resonance image processing method and device, and a computer-readable storage medium. The method includes: determining a central angle; converting, on the basis of the central angle, a radio-frequency field pattern of a radio-frequency transmitting coil into an angular pattern; acquiring, on the basis of a trigonometric function value of the angular pattern, a radio-frequency transmitting field pattern of the radio-frequency transmitting coil; and correcting, on the basis of the radio-frequency transmitting field pattern, a magnetic resonance image to be corrected.
    Type: Application
    Filed: December 1, 2021
    Publication date: June 30, 2022
    Inventors: Hanbei Zhang, Yongchuan Lai, Pengfei Lu, Zhao Wang, Pengshuai Wang
  • Patent number: 11360171
    Abstract: Embodiments of the present invention provide a magnetic resonance imaging system and a method for obtaining magnetic resonance imaging data. The method comprises: applying a fat suppression pulse before the start of any repetition time of an imaging sequence; performing a plurality of echoes in the repetition time, wherein first image data when water and fat are in phase and second image data when water and fat are out of phase are obtained during each echo of the plurality of echoes; and obtaining fat-suppressed image data according to the first image data and the second image data.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: June 14, 2022
    Assignee: GE Precision Healthcare LLC
    Inventors: Nan Cao, Yongchuan Lai, Pengfei Lu
  • Patent number: 11287493
    Abstract: Embodiments of the present invention provide a magnetic resonance imaging method and system and a computer-readable storage medium.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: March 29, 2022
    Assignee: GE Precision Healthcare LLC
    Inventors: Longqing Wang, Weinan Tang, Kun Wang, Hongbin Wang, Yongchuan Lai, Jiabin Yao
  • Publication number: 20210405140
    Abstract: Embodiments of the present invention provide a method for acquiring and processing magnetic resonance data, a magnetic resonance imaging system and method, and a computer-readable storage medium. The method for acquiring and processing magnetic resonance data comprises: populating, to a K-space, a plurality of sets of echo data acquired from a plurality of excitations of a tissue to be imaged, wherein at least two of the plurality of sets of echo data have opposite K-space populating orders; and reconstructing an image based on the echo data populated to the K-space.
    Type: Application
    Filed: June 21, 2021
    Publication date: December 30, 2021
    Inventors: Nan CAO, Yongchuan LAI
  • Publication number: 20210393216
    Abstract: Embodiments of the present invention provide a magnetic resonance system, an image display method thereof, and a computer-readable storage medium. The method includes: acquiring sequential images to be displayed, the sequential images comprising a plurality of images; determining an identical window width for the plurality of images; and displaying the plurality of images of the sequential images based on the window width.
    Type: Application
    Filed: June 18, 2021
    Publication date: December 23, 2021
    Inventors: Nan CAO, Yongchuan LAI, Jianyong YIN