发明申请
- 专利标题: Minimum Energy Shim Coils For Magnetic Resonance
- 专利标题(中): 磁共振的最小能量线圈
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申请号: US11908293申请日: 2006-03-03
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公开(公告)号: US20080164878A1公开(公告)日: 2008-07-10
- 发明人: Michael A. Morich , Shmaryu M. Shvartsman , Gordon D. DeMeester
- 申请人: Michael A. Morich , Shmaryu M. Shvartsman , Gordon D. DeMeester
- 申请人地址: NL Eindhoven
- 专利权人: KONINKLIJKE PHILIPS ELECTRONICS N. V.
- 当前专利权人: KONINKLIJKE PHILIPS ELECTRONICS N. V.
- 当前专利权人地址: NL Eindhoven
- 国际申请: PCT/IB06/50682 WO 20060303
- 主分类号: G01R33/3875
- IPC分类号: G01R33/3875
摘要:
In a magnetic resonance imaging system (10), a main magnet (20) generates a substantially uniform main magnetic field (B0) through an examination region (14). An imaging subject (16) generates inhomogeneities in the main magnetic field (B0). One or more shim coils are positioned adjacent a gradient coil (26). The gradient coil (26) is driven in halves by first and second power sources (28, 30) which have slightly dissimilar power characteristics which induce an inductive coupling between the shim coil (60) and the gradient coil (26). The shim coil (60) is designed to produce a desired magnetic field, such that the inductive coupling of the shim coils (60) to the gradient coil (26) is substantially minimized while the inhomogeneities in the main magnetic field (B0) caused by the imaging subject are corrected based on prespecified spatial characteristics.
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