| 发明名称 |
System and apparatus for compensating for magnetic field distortion in an MRI system |
| 摘要 |
A magnet apparatus for a magnetic resonance imaging system, the magnet apparatus includes a cylindrical vacuum vessel, a closed loop cooling system disposed within the vacuum vessel and a cylindrical thermal shield disposed between the vacuum vessel and the closed loop cooling system. A set of passive compensation coils are disposed within the vacuum vessel and used to compensate for magnetic field distortion caused by mechanical vibrations within the magnet apparatus. |
| 申请公布号 |
US9274188(B2) |
申请公布日期 |
2016.03.01 |
| 申请号 |
US201213690392 |
申请日期 |
2012.11.30 |
| 申请人 |
General Electric Company |
发明人 |
Shen Weijun;Havens Timothy J.;Jiang Longzhi;Kidane Tesfaye K. |
| 分类号 |
G01V3/00;G01R33/34;G01R33/387;G01R33/3815;G01R33/3875 |
主分类号 |
G01V3/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A magnet apparatus for a magnetic resonance imaging system, the magnet apparatus comprising:
a cylindrical vacuum vessel; a closed loop cooling system disposed within the vacuum vessel; a cylindrical thermal shield disposed between the vacuum vessel and closed loop cooling system; and a set of passive compensation coils disposed within the vacuum vessel configured to compensate for magnetic field distortion caused by mechanical vibrations within the magnet apparatus; wherein the set of passive compensation coils comprises:
a first set of passive compensation coils for a z-axis direction;a second set of passive compensation coils for a y-axis direction; anda third set of passive compensation coils for an x-axis direction. |
| 地址 |
Schenectady NY US |
