发明申请
- 专利标题: MAGNETIC RESONANCE IMAGING APPARATUS
- 专利标题(中): 磁共振成像装置
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申请号: US12912385申请日: 2010-10-26
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公开(公告)号: US20110089948A1公开(公告)日: 2011-04-21
- 发明人: Masahiro Takizawa , Tetsuhiko Takahashi
- 申请人: Masahiro Takizawa , Tetsuhiko Takahashi
- 申请人地址: JP Tokyo
- 专利权人: HITACHI MEDICAL CORPORATION
- 当前专利权人: HITACHI MEDICAL CORPORATION
- 当前专利权人地址: JP Tokyo
- 优先权: JP2005-216660 20050727
- 主分类号: G01R33/48
- IPC分类号: G01R33/48
摘要:
An MRI apparatus includes an imaging means being provided with a means for generating magnetic fields respectively of a static magnetic field, a gradient magnetic field, and an RF magnetic field, and a means for receiving an echo signal generated from a subject, the imaging means being for measuring echo data associated with at least one measurement trajectory in k-space, while varying angles with respect to a coordinate axis in the k-space of the measurement trajectory, so as to collect at least one measured data for each of the angles; and an image reconstruction means for rearranging the measured data in the k-space and reconstructing an image; wherein, the image reconstruction means calculates a phase for correction based on standard data selected from the measured data for each of the angles, prior to rearranging the measured data in the k-space, and performs a phase correction as to the measured data, by using the phase for correction being calculated. With the procedure above, it is possible to reduce an artifact caused by the nonlinearity of the gradient magnetic field and/or inhomogeneities of the magnetic field, without extending the imaging time.
公开/授权文献
- US08344729B2 Magnetic resonance imaging apparatus 公开/授权日:2013-01-01