Abstract: The invention relates to a magnetic-resonance imaging (MRI) apparatus comprising an electrical coil system (17) for transmitting and receiving a radio-frequency (RF) magnetic field from an examination volume (3) of the MRI apparatus. The electrical coil system (17) comprises at least one surface coil (35) which extends substantially in a plane. The surface coil is used for transmitting and/or receiving a RF magnetic field which is oriented substantially perpendicularly to the plane of the surface coil (35). The surface coil (35) has a main coil axis (37). When the MRI apparatus is in use, the main coil axis (37) extends substantially parallel to a main magnetic field in the examination volume (3) of the MRI apparatus. On both sides of the main coil axis (37), the surface coil (35) comprises an electrically conducting element (39) which extends substantially parallel to the main coil axis (37).

Abstract: The invention relates to a radio-frequent (RF) coil system (17, 17?) for use in a magnetic resonance imaging (MRI) system. The RF coil system comprises at least one main coil (35) for transmitting an RF magnetic field (B1) into and/or receiving an RF magnetic field (B1?) from an examination volume (3) of the MRI system. The main coil has a main coil axis (37), which is or is to be oriented parallel to a main magnetic field (B0) in the examination volume, and at least one electrical conductor (39, 41) which extends mainly parallel to the main coil axis. According to the invention, the RF coil system comprises at least two electrical auxiliary coils (51, 53, 55, 57) which are assigned to said conductor of the main coil. The auxiliary coils are arranged on opposite sides of said conductor of the main coil.

Abstract: The invention relates to a radio-frequent (RF) coil system (17, 17?) for use in a magnetic resonance imaging (MRI) system. The RF coil system comprises at least one main coil (35) for transmitting an RF magnetic field (B1) into and/or receiving an RF magnetic field (B1?) from an examination volume (3) of the MRI system. The main coil has a coil axis (36), which is or is to be oriented parallel to a main magnetic field (Bo) in the examination volume (3), and at least one electrical conductor (37, 39) which extends mainly parallel to the coil axis. According to the invention, the RF coil system comprises an auxiliary coil (45, 47) which is assigned to said conductor of the main coil. The auxiliary coil has two electrical conductors (49, 51) which extend mainly parallel to the coil axis and on opposite sides of said conductor of the main coil. A distance between the two conductors of the auxiliary coil and the conductor of the main coil is small relative to a main dimension (L) of the main coil.