公开(公告)号：US10054658B2

公开(公告)日：2018-08-21

申请号：US14584272

申请日：2014-12-29

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Dawei Gui ,  Xiaoli Zhao ,  Zhenghui Zhang ,  Hao Shen ,  Stephen Joseph Garnier

IPC: G01R33/56 ,  G01R33/565 ,  G01R33/24

CPC classification number: G01R33/5659 ,  G01R33/246

Abstract: A controller that is operatively connected with a magnet assembly, which defines a target volume; and an image processor, which is configured to obtain calibration data from the controller; map B1 transmit intensity from the magnet assembly to the target volume, based on the calibration data; calculate a B1 transmit shading correction based at least on the map of B1 transmit intensity and on pulse sequence parameters; obtain k-space data of an imaging subject within the target volume from the controller operating the magnet assembly based on the pulse sequence parameters; develop an MR image from the k-space data; and apply the B1 transmit shading correction to the MR image.

公开(公告)号：US20180120399A1

公开(公告)日：2018-05-03

申请号：US15799025

申请日：2017-10-31

Applicant: General Electric Company

Inventor： Yongchuan Lai ,  Xiaoli Zhao ,  Weiwei Zhang ,  Stephen Joseph Garnier ,  Lisha Nie ,  Pengfei Lu ,  Hongbin Wang

IPC: G01R33/56 ,  G01R33/36 ,  G01R33/34

CPC classification number: G01R33/56 ,  G01R33/34046 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/5659

Abstract: The present invention provides a method and apparatus for correcting a uniformity of a magnetic resonance image, the method comprising: acquiring a first uniformity enhancement image by a phased-array uniformity enhancement method; and dividing the first uniformity enhancement image by a receiving sensitivity distribution value of a body coil in a magnetic resonance imaging device, so as to acquire a second uniformity enhancement image. The method may further comprise: dividing the second uniformity enhancement image by a spatial signal distribution value resulting from a field strength distribution of a transmitting radio-frequency field, so as to acquire a third uniformity enhancement image.