发明授权
- 专利标题: Method for eliminating motional artifacts in magnetic resonance imaging
- 专利标题(中): 消除磁共振成像中运动伪影的方法
-
申请号: US985645申请日: 1992-12-07
-
公开(公告)号: US5382902A公开(公告)日: 1995-01-17
- 发明人: Yo Taniguchi , Etsuji Yamamoto
- 申请人: Yo Taniguchi , Etsuji Yamamoto
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX3-322211 19911206
- 主分类号: A61B5/055
- IPC分类号: A61B5/055 ; G01R33/32 ; G01R33/563 ; G01R33/567 ; G01V3/00
摘要:
A magnetic resonance imaging method for obtaining an image of an object laid in a space in which a static magnetic field is applied, so as to substantially eliminate motional artifacts. The method includes sequentially measuring a plurality of magnetic resonance views with a plurality of encodings by repeating a measurement sequence of exciting nuclear spins in said object, applying a phase-encoding field gradient along a first direction with programmed time integral to encode the excited spins, and detecting the encoded spins in the presence of a readout field gradient along a second direction to generate a magnetic resonance view so that measurements of magnetic resonance views with at least low-order encoding are obtained during the repetition of the measurement sequence. Thereafter respective magnetic resonance views are subjected to a first Fourier transformation so as to generate a plurality of projection views with a plurality of encodings forming a data matrix in a hybrid domain, displacements in respective projection views due to motion of the object are corrected using displacement information obtained from projection views with low-order encodings so as to generate a corrected data matrix in the hybrid domain, and the corrected data matrix is subjected to a second Fourier transformation so as to generate the image of the object.
公开/授权文献
信息查询