利索-全球专利检索

  1. 登录
  2. 注册
发明申请
US20090021261A1 Rf trap tuned by selectively inserting electrically conductive tuning elements 审中-公开
通过选择性地插入导电调谐元件来调谐Rf陷波器

Rf trap tuned by selectively inserting electrically conductive tuning elements
摘要：
A magnetic resonance imaging scanner (10) includes a main magnet (20) generating a spatially uniform main magnetic field at least over a field of view, a plurality of gradient coils (30) selectively generating magnetic field gradients at least over the field of view, and a radio frequency coil (32, 34) for performing at least one of exciting and detecting magnetic resonance at the selected resonance frequency in an imaging subject disposed in the field of view. A radio frequency trap (60, 60′) connected with the radio frequency coil (32, 34) includes helically grooved dielectric formers (62, 62) around which a coaxial cable (64) is wrapped. A plurality of electrically conductive tuning elements such as screws or rods (84, 90) are selectively inserted into the dielectric formers (62, 62) to tune the radio frequency trap (60, 60) to a selected resonance frequency by adjusting the inductance of the trap.
摘要（中）：

磁共振成像扫描仪（10）包括至少在视场上产生空间上均匀的主磁场的主磁体（20），多个梯度线圈（30）至少在视场上产生磁场梯度 以及射频线圈（32,34），用于在设置在视野中的成像对象中执行激励和检测在所选谐振频率处的磁共振中的至少一个。 与射频线圈（32,34）连接的射频陷波器（60,60'）包括螺旋沟槽电介质形成器（62,62），同轴电缆（64）绕其周围缠绕。 多个导电调谐元件（例如螺钉或杆（84,90））被选择性地插入到电介质成形器（62,62）中，以通过调节电感（60,60）来调谐射频陷波器（60,60）到所选择的谐振频率 陷阱。

信息查询
Global Dossier Espacenet
0/0