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:
- 宮脇 昇一
- 申请号：
- JP2006195175
- 公开号：
- JP4969933B2
- 申请日:
- 2006.07.18
- 申请国别(地区):
- JP
- 年份:
- 2012
- 代理人:
- 摘要：
PROBLEM TO BE SOLVED: To provide an economical magnetic resonance imaging device which can correct irregular magnetic fields such as an eddy current magnetic field and/or a residual magnetic field by a simple device constitution, simplify the correcting control of the same, and reduce image deterioration by the irregular magnetic field.
SOLUTION: An irregular magnetic field characteristic data of every photographing space component for correcting the irregular magnetic field induced by the impression of a gradient magnetic field is measured (S201). A primary gradient component and a polarized component of the irregular magnetic field in the photographing space are calculated out from the measured characteristic data and the average value of the primary gradient component and the polarized component are calculated out from the calculated value. The current for correcting the irregular magnetic field from the calculated average value is calculated out (S202), and the irregular magnetic field is corrected by superposing the same on a gradient magnetic field current (S203).
COPYRIGHT: (C)2008,JPO&INPIT
- 来源网站：
- 中国工程科技知识中心
