| 摘要 |
The present invention comprises a whole body RF coil system for use with an open magnetic resonance (MR) imaging system. The RF coil system comprises first and second quadrature RF coil sets (38) positioned on opposing sides of an imaging volume. Each RF coil set comprises similarly-structured, multiple RF coils. Each quadrature RF coil comprises a first and second plurality of primary path conductor segments (82,94), and first and second return path conductors (104,106), symmetrically disposed about a centerline at specified distances. The first and second plurality of primary path conductor segments are positioned in a first plane (84) that is substantially spaced apart (Z2) from a second plane (114), farther from the imaging volume, containing the first and second return path conductors. The conductors within each of the first and second set of primary path conductor segments are adapted to have a predetermined current amplitude ratio. Upon energization of the first and second RF coil sets in quadrature to generate a circular, polarized B1 field, the positioning of the conductors and the predetermined current amplitude ratio provide a desired homogeneity within the imaging volume and a desired sensitivity drop-off outside of the imaging volume. <IMAGE> |
