MRI apparatus provided with RF coils having non-parallel sensitivities for forming images while utilizing sub-sampling

摘要

The acquisition of MR images while utilizing sub-sampling of the RF signals generated in the patient 21 to be examined is known. Such sub-sampling methods require at least two RF receiving coils which should not have a substantial component of their sensitivity vectors in common. According to the invention at least two coils 22 a , 22 b are used, a first one ( 22 a) having its sensitivity vector extending substantially transversely of its physical coil plane whereas a second one ( 22 b) has its sensitivity vector extending substantially parallel to its physical coil plane. The coils can thus be placed close to the surface of the patient without interfering with each other. They can be arranged in such a manner that their planes are oriented parallel to the main magnetic field Bo. Moreover, the coils can be arranged so as to overlap substantially, so that they provide the same field of view.