| 摘要 |
<p>A multiple tuned bird cage coil for providing a substantially uniform RF field in a cylindrical sample area of said coil and exhibiting at least two fundamental resonant frequencies comprises a plurality of leg conductors (44) disposed spaced from an axis and at least three rings conductors (42a-d) disposed about the axis and coupled to the leg conductors to define the cylindrical sample area with the leg conductors. The ring conductors and the leg conductors define a low pass bird cage coil that shares a portion of each of the leg conductors with a high pass bird cage coil. A higher frequency current and a lower frequency current flow through the shared portion of each of the leg conductors to provide the substantially uniform RF field in the cylindrical sample area. The bird cage coil may comprise meander line inductances.</p> |
