Patent ID: 7719281
Filing Date: 2010-05-18
Classification: G01R

Abstract:
1. A method for controlling a magnetic resonance system comprising a radio-frequency (RF) antenna structure and a plurality of individually controllable transmission channels, comprising the steps of: in parallel, supplying a plurality of RF signals respectively via the transmission channels to the antenna structure to cause the antenna structure to radiate a predetermined RF field distribution in at least one volume region within an examination volume of the magnetic resonance system; in each of said transmission channels, modulating a digital signal therein on a carrier frequency to produce the RF signal within that transmission channel; from each transmission channel, supplying the RF signal therein via an RF signal path therefrom to an RF power amplifier and amplifying the RF signal in said RF amplifier, said RF signal path imparting a distortion to the RF signal therein; prior to amplifying each RF signal in said amplifier, correcting the RF signal with a correction characteristic curve of the RF signal path in which the RF signal is conducted; and for each of said transmission channels, predetermining the respective correction curve of the signal path therefrom dependent on a field distribution parameter that defines said predetermined RF field distribution prior to radiation by said antenna structure.