发明申请
US20110085722A1 CORRECTION OF DISTORTIONS IN DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGING 有权
扩散加权磁共振成像中的失真校正

  • 专利标题: CORRECTION OF DISTORTIONS IN DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGING
  • 专利标题(中): 扩散加权磁共振成像中的失真校正
  • 申请号: US12904312
    申请日: 2010-10-14
  • 公开(公告)号: US20110085722A1
    公开(公告)日: 2011-04-14
  • 发明人: Thorsten Feiweier
  • 申请人: Thorsten Feiweier
  • 优先权: DE102009049402.2 20091014
  • 主分类号: G06K9/00
  • IPC分类号: G06K9/00 G01R33/48
CORRECTION OF DISTORTIONS IN DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGING
摘要:
In a method and magnetic resonance apparatus for correction of image distortions that occur in acquisition of diffusion-weighted magnetic resonance images of an examination subject, a reference image is acquired without diffusion weighting, a first diffusion-weighted image is acquired for a diffusion direction, a second diffusion-weighted image is acquired for the same diffusion direction, with the acquisition of the second diffusion-weighted image taking place at least with a different diffusion weighting or a different diffusion gradient polarity than the acquisition of the first diffusion-weighted image. Distortion parameters for the correction of image distortions in the acquired diffusion-weighted images are acquired, and the first diffusion-weighted image is deskewed with a first set of deskewing parameters, and the second diffusion-weighted image is deskewed with a second set of deskewing parameters. The first set and second set of deskewing parameters are correlated, and the deskewing parameters are determined by simultaneous minimization of differences between the deskewed first image and the reference image and differentiation between the deskewed second image and the reference image.
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