发明名称 |
METHOD AND APPARATUS FOR REDUCTION OF GRADIENT COIL VIBRATION IN MRI SYSTEMS |
摘要 |
A cylindrical superconducting magnet system for use in magnetic resonance imaging has axially aligned primary superconducting coils surrounded by a thermal radiation shield within a vacuum vessel. A gradient coil assembly is axially aligned with and located radially within the primary superconducting coils. An assembly support is, radially positioned outside of the primary superconducting coils and is mechanically attached to the gradient coil assembly at a number of locations around the circumference of the gradient coil assembly, and at a number of axial locations along the gradient coil assembly, by radially-directed mechanical attachments that pass though through-holes through the vacuum vessel and the thermal radiation shield, and mechanically isolated from the vacuum vessel. At least some of the mechanical attachments each comprise an active force transducer arranged to provide impulses of force onto a surface of the gradient coil assembly to oppose vibrations of the gradient coil assembly. |
申请公布号 |
US2015369888(A1) |
申请公布日期 |
2015.12.24 |
申请号 |
US201314410691 |
申请日期 |
2013.05.29 |
申请人 |
SIEMENS PLC |
发明人 |
CALVERT Simon James |
分类号 |
G01R33/385;G01R33/3815;H01F6/06 |
主分类号 |
G01R33/385 |
代理机构 |
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代理人 |
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主权项 |
1. A cylindrical superconducting magnet system for use in magnetic resonance imaging, comprising:
axially aligned primary superconducting coils, positioned within a vacuum vessel; a thermal radiation shield surrounding the primary superconducting coils, within the vacuum vessel; a gradient coil assembly axially aligned with the primary superconducting coils and located radially within the primary superconducting coils; an assembly support, radially positioned outside of the primary superconducting coils and mechanically attached to the gradient coil assembly at a number of locations around the circumference of the gradient coil assembly, and at a number of axial locations along the gradient coil assembly, by radially-directed mechanical attachments that pass though through-holes through the vacuum vessel and the thermal radiation shield, and mechanically isolated from the vacuum vessel; and at least some of the mechanical attachments each comprising an active force transducer arranged to provide impulses of force onto a surface of the gradient coil assembly to oppose vibrations of the gradient coil assembly. |
地址 |
Camberley GB |