Radio frequency antenna system

Abstract

According to the invention, a radio frequency antenna system (1) for a magnetic resonance imaging device comprising a radio frequency coil (2) which, when mounted in a bore of the magnetic resonance imaging device has a total coil impedance composed of a coil impedance and a patient-specific impedance of a patient, a preamplifier (3) connected to the radio frequency coil (2), by means of which a signal received by the radio frequency coil (2) can be amplified and an amplified output signal can be output, a matching network (4) which is interconnected between the radio frequency coil (2) and the preamplifier (3) with which the total coil impedance of the radio frequency coil (2) is adjustable and a controller (5), wherein the radio frequency coil (2) comprises a first coil loop (6) and at least one further coil loop (7), the controller (5) is connected to the radio frequency coil (2), the matching network (4) and the preamplifier (3) and the controller (5) is adapted for noise impedance matching between the radio frequency coil (2) and the preamplifier (3) as a function of patient-specific parameters by controlling the employment of the first coil loop (6) and the at least one further coil loop (7) and by controlling the matching network (4). In this way, a radio frequency antenna system with improved impedance matching is provided.

Dependencies are inferred from the claim text.