公开(公告)号：US20240385274A1

公开(公告)日：2024-11-21

申请号：US18318489

申请日：2023-05-16

Applicant: GE Precision Healthcare LLC

Inventor： Nitin Jain ,  Ashok Kumar P Reddy ,  Rajdeep Das ,  Sajith Rajamani ,  Rajagopalan Sundaresan ,  Harsh Kumar Agarwal ,  Ramesh Venkatesan

IPC: G01R33/58 ,  G01R33/56 ,  G01R33/561 ,  G01R33/563

Abstract: A method includes obtaining k-space data acquired by an MRI scanner from a single channel body coil utilizing a multi-shot EP-DWI pulse sequence and sampling the k-space data for a plurality of shots so that for each shot both a central k-space is fully sampled to form a central calibration region and an outer k-space is partially sampled by a factor equal to a number of shots. The method includes reconstructing an initial fully sampled k-space estimate for each shot utilizing both partial Fourier constant sampling and projection on convex sets reconstruction, wherein the plurality of shots is treated as a plurality of channels for filling in missing k-space for a respective shot. The method includes utilizing a low-rank regularization algorithm in an iterative manner to generate a reconstructed image for each shot, wherein the initial fully sampled k-space estimate for each shot is utilized as an initial guess.

公开(公告)号：US20230324487A1

公开(公告)日：2023-10-12

申请号：US17715617

申请日：2022-04-07

Applicant: GE PRECISION HEALTHCARE LLC

Inventor： Nitin Jain ,  Rajagopalan Sundaresan ,  Harsh Agarwal ,  Ramesh Venkatesan

IPC: G01R33/561 ,  G01R33/48 ,  G01R33/565

CPC classification number: G01R33/561 ,  G01R33/4818 ,  G01R33/56509

Abstract: A magnetic resonance (MR) imaging acceleration method is provided. The method includes applying, by an MR system, a pulse sequence having a k-space trajectory of a plurality of blades being rotated in k-space, each blade including a plurality of views, wherein the k-space trajectory has an undersampling pattern in the k-space. The method also includes receiving k-space data of a subject acquired by the pulse sequence, reconstructing MR images of the subject based on the k-space data using compressed sensing, and outputting the reconstructed images.

公开(公告)号：US11953574B2

公开(公告)日：2024-04-09

申请号：US17715617

申请日：2022-04-07

Applicant: GE PRECISION HEALTHCARE LLC

Inventor： Nitin Jain ,  Rajagopalan Sundaresan ,  Harsh Agarwal ,  Ramesh Venkatesan

IPC: G01R33/561 ,  G01R33/48 ,  G01R33/565

CPC classification number: G01R33/561 ,  G01R33/4818 ,  G01R33/56509

Abstract: A magnetic resonance (MR) imaging acceleration method is provided. The method includes applying, by an MR system, a pulse sequence having a k-space trajectory of a plurality of blades being rotated in k-space, each blade including a plurality of views, wherein the k-space trajectory has an undersampling pattern in the k-space. The method also includes receiving k-space data of a subject acquired by the pulse sequence, reconstructing MR images of the subject based on the k-space data using compressed sensing, and outputting the reconstructed images.