发明授权
- 专利标题: Method and apparatus for diffusion magnetic resonance imaging with the effects of eddy currents compensated
- 专利标题(中): 扩散磁共振成像的方法和装置,具有涡流补偿的作用
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申请号: US11217405申请日: 2005-09-02
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公开(公告)号: US07218110B2公开(公告)日: 2007-05-15
- 发明人: Weiguo Zhang , David M. Kramer
- 申请人: Weiguo Zhang , David M. Kramer
- 申请人地址: US CA Tustin
- 专利权人: Toshiba America MRI, Inc.
- 当前专利权人: Toshiba America MRI, Inc.
- 当前专利权人地址: US CA Tustin
- 代理机构: Nixon & Vanderhye P.C.
- 主分类号: G01V3/00
- IPC分类号: G01V3/00
摘要:
A method and a system for acquiring diffusion magnetic resonance images with compensation of the effects of eddy currents induced by the diffusion weighting (DW) gradient pulses. Prescan data are first acquired using the same DW sequence to be used for imaging. The prescan data are used to obtain eddy current parameters that model the effects of DW-induced eddy currents under the exact conditions under which DW images are to be acquired. The DW imaging sequence is then slightly modified according to the eddy current parameters and used to acquire DW image data with the effects of DW-induced eddy currents compensated.