Patent ID: 8134368
Filing Date: 2012-03-13
Classification: G01R,H01F

Abstract:
1. A magnetic resonance examination system, comprising a superconducting main magnet surrounding an examination region and generating a main magnetic field in the examination region, and a magnetic field gradient system selectively causing alternating gradient magnetic fields in the examination region, said magnetic field gradient system being coupled to the main magnet, wherein the magnetic resonance examination system comprises a detecting device for detecting an emerging quench of the main magnet, said detecting device being adapted to operate in different modes depending on the mode of operation of the magnetic resonance examination system, wherein the detecting device is adapted to operate in a first operating mode during ramp-up and ramp-down of the main magnet, in which mode the detecting device compares a first measurement signal with a first threshold, and the detecting device is adapted to operate in a second operating mode during continuous operation of the main magnet, in which mode the detecting device compares a second measurement signal with a second threshold.