Tunable radio frequency receiver coil

Abstract

For detecting an error of a magnetic resonance examination system, a tunable radio frequency RF receiver coil assembly is provided The RF receiver coil assembly comprises at least one RF receiver coil (), an electronic de-/tune circuit () for switching between a low noise reception state of the tunable RF receiver coil () and a passive state of the tunable RF receiver coil (), and a monitor circuit (). The monitor circuit () is electrically insulated from and reactively coupled to the electronic de-/tune circuit () and is adapted to inductively measure the AC electrical current or AC voltage in the electronic de-/tune circuit () induced by a RF transmit signal generated by the magnetic resonance examination system or the monitor circuit () is adapted to couple an RF signal into the tunable RF receiver coil () wherein the tunable RF receiver coil () is arranged to receive the coupled RF signal by a magnetic resonance preamplifier (). For correlating the inductively measured electrical current in the electronic de-/tune circuit () or the coupled RF signal received by the magnetic resonance preamplifier () to the RF transmit operational status of a RF transmit pulse envelope for the RF transmit signal generated by the magnetic resonance examination system the RF receiver coil assembly comprises a correlator device (), wherein the correlator device () is connected to the monitor circuit. Further a magnetic resonance examination system and a method for detecting an error of a magnetic resonance examination system is provided.