发明授权
US06380738B1 Method and apparatus for reducing image artifacts caused by magnet vibration in an MR imaging system 失效
用于降低由MR成像系统中的磁体振动引起的图像伪像的方法和装置

  • 专利标题: Method and apparatus for reducing image artifacts caused by magnet vibration in an MR imaging system
  • 专利标题(中): 用于降低由MR成像系统中的磁体振动引起的图像伪像的方法和装置
  • 申请号: US09469864
    申请日: 1999-12-22
  • 公开(公告)号: US06380738B1
    公开(公告)日: 2002-04-30
  • 发明人: Xiaohong Zhou
  • 申请人: Xiaohong Zhou
  • 主分类号: G01V300
  • IPC分类号: G01V300
Method and apparatus for reducing image artifacts caused by magnet vibration in an MR imaging system
摘要:
A magnetic resonance (MR) imaging system including a method and apparatus for reducing image artifacts caused by magnet vibration is disclosed herein. The system includes a magnetic field vibration quantification and compensation scheme including quantifying a vibration error component included in the magnetic field configured to acquire k-space data corresponding to an MR image, and correcting the k-space data using the vibration error component. The vibration-induced magnetic field perturbation includes a spatially invariant magnetic field, a spatially linear readout magnetic field gradient, a spatially linear phase-encoding magnetic field gradient, and a spatially linear slice-selection magnetic field gradient. The vibration error component can be at least one of a spatially independent phase error of the spatially invariant magnetic field, a kx-space displacement error of the spatially linear readout magnetic field gradient, a ky-space displacement error of the spatially linear phase-encoding magnetic field gradient, and a slice-selection error of the spatially linear slice-selection magnetic field gradient.
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