公开(公告)号：US20190331750A1

公开(公告)日：2019-10-31

申请号：US15965763

申请日：2018-04-27

Applicant: General Electric Company

Inventor： Quan Zhu ,  Gaohong Wu ,  Shaorong Chang ,  Richard Hinks

IPC: G01R33/565 ,  G01R33/563

Abstract: Various methods and systems are provided for ghost artifact reduction in magnetic resonance imaging (MRI). In one embodiment, a method for an MRI system comprises acquiring a non-phase-encoded reference dataset, calculating phase corrections for spatial orders higher than first order from the non-phase-encoded reference dataset, acquiring a phase-encoded k-space dataset, correcting the phase-encoded k-space dataset with the phase corrections, and reconstructing an image from the corrected phase-encoded k-space dataset. In this way, ghost artifacts caused by phase errors during EPI may be substantially reduced, thereby improving image quality especially when imaging with a large field of view.

公开(公告)号：US20180284211A1

公开(公告)日：2018-10-04

申请号：US15927218

申请日：2018-03-21

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Ke Li ,  Gaohong Wu ,  Eric Printz ,  Kenichi Kanda ,  Margaret Ann Wiza

IPC: G01R33/563 ,  G01R33/54 ,  G01R33/483 ,  A61B5/055

CPC classification number: G01R33/56341 ,  A61B5/055 ,  G01R33/4835 ,  G01R33/543

Abstract: Methods and systems for performing magnetic resonance diffusion weighted imaging of an object is provided. The method includes applying a plurality of diffusion gradients to a plurality of image slices of the object during a plurality of repetition times via an MRI system. A different diffusion gradient of the plurality is applied to each image slice during the same repetition time.

公开(公告)号：US10746830B2

公开(公告)日：2020-08-18

申请号：US16115466

申请日：2018-08-28

Applicant: General Electric Company

Inventor： Gaohong Wu ,  Richard Scott Hinks ,  Robert Marc Lebel ,  Moran Wei

IPC: G01R33/483 ,  G01R33/563 ,  G01R33/48

Abstract: Methods and systems are provided for hybrid slice encoding. In one embodiment, a method for magnetic resonance imaging comprises, during a scan with a pulse sequence, sampling k-space linearly for a predetermined number of echoes, and sampling k-space centrically for remaining echoes of the pulse sequence. In this way, blurriness along the slice direction may be reduced for 3D fast spin echo imaging.

公开(公告)号：US10690741B2

公开(公告)日：2020-06-23

申请号：US15965763

申请日：2018-04-27

Applicant: General Electric Company

Inventor： Quan Zhu ,  Gaohong Wu ,  Shaorong Chang ,  Richard Hinks

IPC: G01R33/565 ,  G01R33/563

Abstract: Various methods and systems are provided for ghost artifact reduction in magnetic resonance imaging (MRI). In one embodiment, a method for an MRI system comprises acquiring a non-phase-encoded reference dataset, calculating phase corrections for spatial orders higher than first order from the non-phase-encoded reference dataset, acquiring a phase-encoded k-space dataset, correcting the phase-encoded k-space dataset with the phase corrections, and reconstructing an image from the corrected phase-encoded k-space dataset. In this way, ghost artifacts caused by phase errors during EPI may be substantially reduced, thereby improving image quality especially when imaging with a large field of view.

公开(公告)号：US20200072929A1

公开(公告)日：2020-03-05

申请号：US16115466

申请日：2018-08-28

Applicant: General Electric Company

Inventor： Gaohong Wu ,  Richard Scott Hinks ,  Robert Marc Lebel ,  Moran Wei

IPC: G01R33/483 ,  G01R33/48 ,  G01R33/563

Abstract: Methods and systems are provided for hybrid slice encoding. In one embodiment, a method for magnetic resonance imaging comprises, during a scan with a pulse sequence, sampling k-space linearly for a predetermined number of echoes, and sampling k-space centrically for remaining echoes of the pulse sequence. In this way, blurriness along the slice direction may be reduced for 3D fast spin echo imaging.