| 发明名称 |
METHOD AND APPARATUS FOR RING ARTIFACT REPAIR OF MAGNETIC RESONANCE IMAGES |
| 摘要 |
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. |
| 申请公布号 |
US2017003370(A1) |
申请公布日期 |
2017.01.05 |
| 申请号 |
US201514755793 |
申请日期 |
2015.06.30 |
| 申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
CHEN WEITIAN;PETERS ROBERT DONALD;SLAVENS ZACHARY WILLIAM;KOCH KEVIN MATTHEW |
| 分类号 |
G01R33/565;G06T5/20;G06T5/00;G06T7/00 |
主分类号 |
G01R33/565 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for detecting and repairing a ring artifact in a multi-spectral magnetic resonance image, comprising:
calculating a spatial gradient of a magnetic induction field; kernel searching the spatial gradient; masking the image, based on the kernel search, to identify voxels affected by a ring artifact; and applying a filter to smooth intensities of the voxels identified by the image mask. |
| 地址 |
SCHENECTADY NY US |
