发明授权
- 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: US11912763申请日: 2006-02-23
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公开(公告)号: US07701214B2公开(公告)日: 2010-04-20
- 发明人: Shinji Kurokawa , Yo Taniguchi , Hisaaki Ochi , Shin-ichiro Umemura
- 申请人: Shinji Kurokawa , Yo Taniguchi , Hisaaki Ochi , Shin-ichiro Umemura
- 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
- 代理机构: Antonelli, Terry, Stout & Kraus, LLP.
- 优先权: JP2005-131705 20050428; JP2005-279352 20050927
- 国际申请: PCT/JP2006/303247 WO 20060223
- 国际公布: WO2006/117922 WO 20061109
- 主分类号: G01V3/00
- IPC分类号: G01V3/00
摘要:
When a magnetic resonance signal is received more than once, while a table (transfer unit) is moved, a gradient magnetic field is applied in the table moving direction, and an application amount (intensity and application time) of the gradient magnetic field in the table moving direction is changed every acquisition of data. As for the encoding by the gradient magnetic field in the table moving direction, a series of phase encode is performed at different positions of an examination target, unlike a conventional phase encode. Therefore, the Fourier transform cannot be applied to the image reconstruction. Given this situation, a magnetization map of total FOV of the examination target is determined in such a manner that a sum of the square of an absolute value of a difference is minimized, the difference between a received signal and a signal calculated from the magnetization map set as a variable, and then, the reconstruction is performed. Even when a size of signal acquisition area in the table moving direction is narrow, the magnetic resonance imaging apparatus of the present invention is capable of taking an image of a wide field of view at high speed, by performing the imaging while the table is moved continuously.
公开/授权文献
- US20090219020A1 MAGNETIC RESONANCE IMAGING APPARATUS 公开/授权日:2009-09-03
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