公开(公告)号：US09727953B2

公开(公告)日：2017-08-08

申请号：US14755793

申请日：2015-06-30

Applicant: General Electric Company

Inventor： Weitian Chen ,  Robert Donald Peters ,  Zachary William Slavens ,  Kevin Matthew Koch

IPC: G06K9/00 ,  G06T5/00 ,  G06T7/00 ,  G06T5/20 ,  G01R33/565

CPC classification number: G06T5/002 ,  G01R33/56536 ,  G06T5/20 ,  G06T7/0012 ,  G06T2207/10088

Abstract: An apparatus for detecting and repairing a ring artifact in a multi-spectral magnetic resonance image includes an image processor, which is configured to obtain an off-resonance magnetic field map and a deblurred composite image, to calculate a spatial gradient of the image based on the magnetic field map, to kernel search the spatial gradient, to mask the image, based on the kernel search, in order to identify voxels affected by a ring artifact, and to apply a filter in order to smooth intensities of the voxels identified by the image mask.