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21. 发明授权

US07602188B2 System of electric coils for transmitting and receiving radio-frequency magnetic fields in a magnetic-resonance imaging apparatus, and magnetic-resonance imaging apparatus provided with such a system of electric coils 失效
标题翻译：用于在磁共振成像装置中发射和接收射频磁场的电线圈系统和具有这种电线圈系统的磁共振成像装置
公开(公告)号：US07602188B2
公开(公告)日：2009-10-13
申请号：US11572714
申请日：2005-07-12
申请人： Cecilia Possanzini , Marinus Johannes Adrianus Maria Van Helvoort , Jan Bertus Marten Warntjes , Robert Paul Kleihorst
发明人： Cecilia Possanzini , Marinus Johannes Adrianus Maria Van Helvoort , Jan Bertus Marten Warntjes , Robert Paul Kleihorst
IPC分类号： G01V3/00
CPC分类号： G01R33/341
摘要： The invention relates to a magnetic-resonance imaging (MRI) apparatus comprising an electrical coil system (17) for transmitting and receiving a radio-frequency (RF) magnetic field from an examination volume (3) of the MRI apparatus. The electrical coil system (17) comprises at least one surface coil (35) which extends substantially in a plane. The surface coil is used for transmitting and/or receiving a RF magnetic field which is oriented substantially perpendicularly to the plane of the surface coil (35). The surface coil (35) has a main coil axis (37). When the MRI apparatus is in use, the main coil axis (37) extends substantially parallel to a main magnetic field in the examination volume (3) of the MRI apparatus. On both sides of the main coil axis (37), the surface coil (35) comprises an electrically conducting element (39) which extends substantially parallel to the main coil axis (37). To provide a surface coil (35) which transmits more homogeneous RF magnetic fields and/or has a more homogeneous sensitivity for received RF magnetic fields than known surface coils, at least one of the electrically conducting elements (39) of the surface coil (35) comprises at least two electric conductors (41). With respect to their distance to the main coil axis (37), these electric conductors (41) are positioned at a relatively short distance from each other. In the plane of the surface coil (35), the electric conductors (41)extend substantially parallel to the main coil axis (37) of the surface coil (35).
摘要翻译：本发明涉及一种磁共振成像（MRI）装置，其包括用于从MRI装置的检查体积（3）发射和接收射频（RF）磁场的电线圈系统（17）。电线圈系统（17）包括基本上在平面中延伸的至少一个表面线圈（35）。表面线圈用于传输和/或接收基本上垂直于表面线圈（35）的平面定向的RF磁场。表面线圈（35）具有主线圈轴（37）。当使用MRI装置时，主线圈轴线（37）基本上平行于MRI装置的检查体积（3）中的主磁场延伸。在主线圈轴线（37）的两侧，表面线圈（35）包括基本上平行于主线圈轴线（37）延伸的导电元件（39）。为了提供表面线圈（35），所述表面线圈（35）传递更均匀的RF磁场和/或对已接收的RF磁场具有比已知表面线圈更均匀的灵敏度，表面线圈（35）的至少一个导电元件（39））包括至少两个电导体（41）。对于它们到主线圈轴线（37）的距离，这些电导体（41）位于彼此相对短的距离处。在表面线圈（35）的平面中，电导体（41）基本上平行于表面线圈（35）的主线圈轴线（37）延伸。

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