发明申请
- 专利标题: MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD
- 专利标题(中): 磁共振成像装置和磁共振成像方法
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申请号: US14909807申请日: 2014-08-20
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公开(公告)号: US20160170001A1公开(公告)日: 2016-06-16
- 发明人: Hikaru Hanada , Miyuki TAKAHASHI , Kuniharu OKA , Masahiro TAKIZAWA
- 申请人: HITACHI MEDICAL CORPORATION
- 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: JP2013-182499 20130903
- 国际申请: PCT/JP2014/071771 WO 20140820
- 主分类号: G01R33/565
- IPC分类号: G01R33/565 ; G01R33/36 ; G01R33/48 ; G01R33/385
摘要:
The present invention obtains high-quality images even in a case of measurement with a radial sampling method. For this purpose, pre-measurement is performed to extract only a component different for each blade from among shift amounts from among echo signals, and a shift amount in k-space of an echo signal by the said component is reflected to a reconstruction process. In the pre-measurement, echo signals are obtained respectively by applying readout gradient magnetic field pulses that change the polarity to the positive and negative and that have the same pulse shape as readout gradient magnetic field pulses to be used in an image acquisition sequence. A shift amount is obtained for each axis of X, Y, and Z of an MRI apparatus as a variation amount of a phase difference between both the echo signals.