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公开(公告)号：US5212450A
公开(公告)日：1993-05-18
申请号：US603947
申请日：1990-10-25
CPC分类号： G01R33/34046
摘要： An RF resonator mounted on a dielectric support is operated in quadrature at a selected NMR frequency. The resonator consists of four axially distributed high frequency ring current paths on the support and at least four high frequency current paths interconnect each pair of adjacent ring paths. In the preferred embodiment at least sixteen equally spaced parallel segments connect each ring pair and are aligned with one another. The ring segments between the parallel segments together with the parallel segments form loops. At least one discrete capacitor is placed in each outer current loop thereby interrupting the loop. However, this is done so that no inner loop is interrupted by a capacitor. By using quadrature input/output coupling, either inductive or capacitive, a co-rotating mode is excited in the two outer loops through the inner loops providing a highly uniform field across the resonator.
摘要翻译： 安装在电介质载体上的RF谐振器以选定的NMR频率正交地工作。 谐振器由支撑上的四个轴向分布的高频环路电流路径组成，并且至少四个高频电流路径互连每对相邻环路径。 在优选实施例中，至少十六个等间隔的平行段连接每个环对并且彼此对准。 平行段之间的环段与平行段一起形成环。 每个外部电流环中至少放置一个分立电容器，从而中断环路。 然而，这样做是为了使内部环路不被电容器中断。 通过使用正交输入/输出耦合，无论是电感还是电容耦合，在两个外环中通过内环激励同向旋转模式，从而在谐振器上提供高度均匀的场。
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公开(公告)号：US5194811A
公开(公告)日：1993-03-16
申请号：US561898
申请日：1990-08-02
CPC分类号： G01R33/3635 , G01R33/34046
摘要： A radio frequency volume resonator mounted on a dielectric support can be operated in quadrature at one or more NMR frequencies. The resonator consists of four axially distributed high frequency ring current paths on the dielectric support. At least four high frequency current paths interconnect each pair of adjacent ring paths. The ring segments with interconnecting segments form loops. At least one discrete capacitor is placed in each loop.
摘要翻译： 安装在电介质载体上的射频体积谐振器可以在一个或多个NMR频率下正交地操作。 谐振器由电介质支撑上的四个轴向分布的高频环路电流路径组成。 至少四个高频电流路径互连每对相邻的环路径。 具有互连段的环段形成环路。 每个回路中至少放置一个分立电容器。
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