磁気共鳴イメージング装置
- 专利权人:
- 株式会社日立メディコ
- 发明人:
- 平井 甲亮
- 申请号：
- JP2009013390
- 公开号：
- JP5367389B2
- 申请日:
- 2009.01.23
- 申请国别(地区):
- JP
- 年份:
- 2013
- 代理人:
- 摘要：
PROBLEM TO BE SOLVED: To provide an MRI apparatus capable of highly precisely adjusting echo peak shift due to response delay or the like in a short period of time without a necessity of adjusting an echo peak detection delay for every sequence.
SOLUTION: A sequencer control section 77 actuates a sequencer 6 at a plurality of slew rates and gradient magnetic field intensities set by a slew rate/gradient magnetic field intensity setting section 74. A time deviation measurement section 71 measures a time deviation between an echo peak and an AD sampling timing, a delay time calculation section 72 calculates a delay time, a graph creation section 73 creates a graph indicating their relationship and a storage section 80 stores it. A delay time readout section 75 reads out the delay time corresponding to the slew rate and the gradient magnetic field intensity to be executed from the storage section 80, a compensation pulse calculation section 76 calculates a compensation pulse, and the sequencer control section 77 feeds a command signal to the sequencer 6 by taking account of the delay in the system response and a deviation due to an error between gradient magnetic field areas.
COPYRIGHT: (C)2010,JPO&INPIT
- 来源网站：
- 中国工程科技知识中心
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