| 摘要 |
The invention relates to a system (1) for MR imaging of a body (14) placed in an examination volume (7). The system (1) comprises transmission means for radiating RF signals towards the body (14), control means (20) for controlling the generation of the magnetic field gradients and the RF signals, means (17) for receiving and sampling MR signals, reconstruction means (21) for forming MR images from the signal samples, and auxiliary means (23) such as a catheter to be localised having an RF antenna (24)' for receiving RF signals generated by the transmission means. In order to provide an MR system that enables a safe, reliable and non-interfering transmission of signals and/or power to the auxiliary means (23) located within the examination volume (7), the invention proposes that the system (1) is arranged to generate circularly polarised RF signals via the transmission means, which RF signals have a selectable sense of rotation, i.e. forward polarisation or reverse polarisation. |
