| 主权项 |
1. A method for acquiring magnetic resonance (MR) data from a target region of an examination subject, which includes a metal object, comprising:
operating an MR data acquisition unit, which comprises multiple, individually controllable radio-frequency (RF) coil elements, in which an examination subject is situated, said examination subject comprising a target region that contains a metal object, to acquire MR data from the target region using a magnetic resonance sequence that comprises at least one RF excitation of nuclear spins in the target region; in said MR sequence, radiating RF signals respectively from said multiple RF coils elements with respectively different amplitudes and/or phases, and setting the respectively different amplitudes and/or phases to produce a non-circular polarization of an RF field in said target region that reduces locally induced RF currents in said metal object due to said RF field, in comparison to RF currents induced by a homogenous, circular polarization of said RF field in said target region; and providing MR data acquired from the target region in said MR sequence to a processor and, in said processor, reconstructing an image of the target region from the MR data, said MR image comprising reduced image artifacts as a result of the reduced induced currents, and making said MR image available as a data file at an output of said processor. |
