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公开(公告)号：EP0959365A2
公开(公告)日：1999-11-24
申请号：EP99108413.8
申请日：1999-04-29
IPC分类号： G01R33/3875 , G01R33/385
CPC分类号： G01R33/3875
摘要： A magnetic resonance imaging system comprises a magnet (30) for generating a main magnetic field, a gradient coil (34) to superimpose a linearly varying magnetic field over the main magnetic field, and an RF coil (34) forming part of a transmit/receive system for signals which are used to construct an image. A shimset (32) is positioned between the magnet (30) and the gradient coil (34) to provide magnetic field correction and is constructed so as not to have axial and azimuthal symmetry. This is achieved by providing cutout portions (38) in the shimset (32) which are diametrically opposite each other, similar cutouts (40) being provided in the gradient coil (34) which are aligned with the cutout portions (38). The cutout portions (38, 40) accommodate the shoulders of larger patients, therefore reducing the need to extend the bore size of the magnetic resonance imaging system.
摘要翻译： 磁共振成像系统包括用于产生主磁场的磁体（30），用于在主磁场上叠加线性变化的磁场的梯度线圈（34），以及形成发射/ 接收用于构建图像的信号的系统。 垫片（32）位于磁体（30）和梯度线圈（34）之间，以提供磁场校正，并被构造为不具有轴向和方位对称性。 这通过在彼此沿径向相对的间隙（32）中设置切口部（38）来实现，在与切口部（38）对准的梯度线圈（34）中设置有相似的切口（40）。 切口部分（38,40）容纳较大患者的肩部，因此减少了延长磁共振成像系统的孔尺寸的需要。
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2.发明公开MRI shimset and gradient coil with cutout portions formed therein 有权Shimspulenanordnung并与凹部的磁共振成像梯度线圈
公开(公告)号：EP0959365A3
公开(公告)日：2001-08-01
申请号：EP99108413.8
申请日：1999-04-29
IPC分类号： G01R33/3873 , G01R33/385
CPC分类号： G01R33/3875
摘要： A magnetic resonance imaging system comprises a magnet (30) for generating a main magnetic field, a gradient coil (34) to superimpose a linearly varying magnetic field over the main magnetic field, and an RF coil (34) forming part of a transmit/receive system for signals which are used to construct an image. A shimset (32) is positioned between the magnet (30) and the gradient coil (34) to provide magnetic field correction and is constructed so as not to have axial and azimuthal symmetry. This is achieved by providing cutout portions (38) in the shimset (32) which are diametrically opposite each other, similar cutouts (40) being provided in the gradient coil (34) which are aligned with the cutout portions (38). The cutout portions (38, 40) accommodate the shoulders of larger patients, therefore reducing the need to extend the bore size of the magnetic resonance imaging system.
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