| 摘要 |
The invention relates to an RF (=radio frequency) coil arrangement for an NMR examination apparatus, an object or target to be examined, e.g. a patient or part of a patient being adapted to be placed inside said coil arrangement which is adapted to excite the nuclei of a selected target area by transmitting an RF pulse substantially orthogonal to a homogeneous basic magnetic field produced by the apparatus and, thereafter, to receive and detect an NMR signal generated in the target. In order to eliminate the drawbacks of a so-called saddle coil conventionally used as an RF coil the invention is characterized in that it comprises a transfer line, continuous and wired in a manner that its various parts induce an RF field of different direction. Both in excitation and detection of signals, said transfer line can be adapted to process a magnetic field rotating in just one direction and it can be connected as an endless loop. Especially if a plurality of rounds are desired on an RF coil, a preferably and technically readily designable construction can be achieved by entwining the transfer line into a mesh shaped e.g. as a cylinder or a like body of revolution. |
