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公开(公告)号:US07495441B2
公开(公告)日:2009-02-24
申请号:US10558768
申请日:2004-04-19
申请人: William H. Amor , Dennis K. Everett , Jerome S. Alden , Robert G. Henderson , Terrence M. Doyle , Ronald B. Sharpless , Gerardus B. J. Mulder , Gerardus N. Peeren
发明人: William H. Amor , Dennis K. Everett , Jerome S. Alden , Robert G. Henderson , Terrence M. Doyle , Ronald B. Sharpless , Gerardus B. J. Mulder , Gerardus N. Peeren
IPC分类号: G01V3/00
CPC分类号: G01R33/3873
摘要: A magnetic resonance imaging scanner includes a generally cylindrical main magnet assembly (10) that defines a cylinder axis (16). A first set of shims (60) are rigidly positioned inside the magnet assembly (10) at about a first distance (d1) relative to the cylinder axis (16). A second set of shims (62) are rigidly positioned inside the main magnet assembly (10) at about a second distance (d2) relative to the cylinder axis (16). The second distance (d2) is different from the first distance (d1). A generally cylindrical radio frequency coil (26) is arranged inside the main magnet assembly (10) at about a third distance (d3) relative to the cylinder axis (16). A plurality of gradient coils (20) are arranged inside the main magnet assembly (10) at about a fourth distance (d4) relative to the cylinder axis (16).
摘要翻译: 磁共振成像扫描仪包括限定气缸轴线(16)的大致圆柱形的主磁体组件(10)。 第一组垫片(60)相对于气缸轴线(16)以大约第一距离(d1)刚性地定位在磁体组件(10)的内部。 第二组垫片(62)相对于气缸轴线(16)以大约第二距离(d2)刚性地定位在主磁体组件(10)的内部。 第二距离(d2)与第一距离(d1)不同。 大致圆柱形的射频线圈(26)相对于气缸轴线(16)以大约第三距离(d3)布置在主磁体组件(10)的内部。 多个梯度线圈(20)相对于气缸轴线(16)以大约第四距离(d4)布置在主磁体组件(10)的内部。