发明授权
- 专利标题: Nuclear magnetic resonance tomography apparatus operable with a pulse sequence according to the echo planar method
- 专利标题(中): 核磁共振断层摄影装置可根据回波平面法用脉冲序列进行操作
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申请号: US982444申请日: 1992-11-27
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公开(公告)号: US5304929A公开(公告)日: 1994-04-19
- 发明人: Ming Fang , Ralf Ladebeck , Franz Schmitt , Michael Stehling
- 申请人: Ming Fang , Ralf Ladebeck , Franz Schmitt , Michael Stehling
- 申请人地址: DEX Munich
- 专利权人: Siemens Aktiengesellschaft
- 当前专利权人: Siemens Aktiengesellschaft
- 当前专利权人地址: DEX Munich
- 优先权: DEX4139509 19911129
- 主分类号: G01R33/561
- IPC分类号: G01R33/561 ; G01R33/20
摘要:
In nuclear magnetic resonance tomography apparatus operable with a pulse sequence according to the echo-planar method, only a part of the k-space is scanned in the phase-coding direction per data acquisition, i.e., per radio-frequency excitation pulse. A phase-coding gradient is used such that regions of the k-space which are interleaved relative to each other are scanned in successive data acquisitions in the phase-coding direction. The number of echoes employed for the raw data matrix, and thus the resolution in phase-coding direction, or the length of the individual pulses of the read-out gradient, and thus the resolution in read-out direction, can thereby be enhanced.