RADIO FREQUENCY (RF) BIRDCAGE COIL WITH SEPARATELY CONTROLLED RING MEMBERS AND RUNGS FOR USE IN A MAGNETIC RESONANCE (MR) IMAGING SYSTEM

摘要

A radio frequency (RF) antenna device (40) for applying an RF field to an examination space (16) of a magnetic resonance (MR) imaging system (10), the RF antenna device (40) comprising a plurality of rungs (42, 44) arranged substantially parallel and in an azimuthally substantially equally spaced relationship along an outside of a virtual cylinder (50) with a cylinder axis (52) running parallel to main directions of extension (48); at least one transversal antenna member (54) electromagnetically coupled to at least one rung (42, 44) of the plurality of rungs (42, 44), wherein the at least one transversal antenna member (54) is arranged within a plane substantially perpendicular to the main directions of extension (48) of the plurality of rungs (42, 44); and a plurality of RF circuitries (62, 64, 66), wherein at least one RF circuitry (62, 64, 66) is provided for each rung (42, 44) of the plurality of rungs (42, 44) for mutual decoupling and for individually feeding RF power into and for the at least one transversal antenna member (54) for individually feeding RF power into.

主权项

1. A radio frequency antenna device for applying an RF field to an examination space of a magnetic resonance (MR) imaging system, the RF antenna device comprising
a plurality of rungs made from an electrically conductive material, wherein each rung of the plurality of rungs has a main direction of extension, and wherein in an operational state, the main directions of extension of the plurality of rungs are arranged substantially parallel and in an azimuthally substantially equally spaced relationship along an outside of a virtual cylinder with a cylinder axis running parallel to the main directions of extension; at least one transversal antenna member made from an electrically conductive material that is electromagnetically coupled to at least one rung of the plurality of rungs, wherein the at least one transversal antenna member, in the operational state, is arranged within a plane that is substantially perpendicular to the main directions of extension (48) of the plurality of rungs; and a plurality of RF circuitries, wherein at least one RF circuitry of the plurality of RF circuitries is provided for each rung of the plurality of rungs for mutual decoupling and for individually feeding RF power into and for the at least one transversal antenna member for individually feeding RF power into.