发明授权
US08729899B2 MRI magnet and MRI system with optimized fringe fields, attractive forces and spatial constraints
有权
MRI磁体和MRI系统具有优化的边缘场,吸引力和空间限制
- 专利标题: MRI magnet and MRI system with optimized fringe fields, attractive forces and spatial constraints
- 专利标题(中): MRI磁体和MRI系统具有优化的边缘场,吸引力和空间限制
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申请号: US13178805申请日: 2011-07-08
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公开(公告)号: US08729899B2公开(公告)日: 2014-05-20
- 发明人: Michael Steckner , Bruce C. Breneman
- 申请人: Michael Steckner , Bruce C. Breneman
- 申请人地址: JP Minato-Ku, Tokyo JP Otawara-Shi, Tochigi
- 专利权人: Kabushiki Kaisha Toshiba,Toshiba Medical Systems Corporation
- 当前专利权人: Kabushiki Kaisha Toshiba,Toshiba Medical Systems Corporation
- 当前专利权人地址: JP Minato-Ku, Tokyo JP Otawara-Shi, Tochigi
- 代理机构: Nixon & Vanderhye PC
- 主分类号: G01V3/00
- IPC分类号: G01V3/00
摘要:
A magnetic resonance imaging (MRI) system magnet includes at least one main electromagnet winding disposed within a first radius of the magnet and at least one bucking electromagnet winding disposed within a second radius, larger than the first radius of the magnet and configured to provide self-shielding magnetic fields that substantially reduce fringe magnetic fields outside the magnet produced by the main electromagnet winding. The combination of magnetic fields produced by both the main and bucking electromagnet windings inside the magnet conform to MRI requirements within at least an imaging volume. The main and bucking electro-magnet windings are configured so as to create a net fringe field outside the magnet within the range of 50-100 gauss at a distance within a range of 3-5 meters axially and 2-3 meters radially from a center of the magnet.
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