The present invention relates to a catheter (2) and a magnetic resonance imaging system (1) being usable for detecting the catheter (2) in the magnetic resonance imaging system (1). The catheter (2) comprises a cavity for providing a magnetic resonance fluid from which magnetic resonance signals generated by the magnetic resonance imaging system (1) are receivable, wherein the cavity is adapted for providing at least one of a cooling and an irrigation fluid as the magnetic resonance fluid. The catheter (2) comprises further a tracking coil (15) for tracking the catheter (2), wherein the tracking coil (15) is adapted to receive the magnetic resonance signals from the magnetic resonance fluid. Thus, the magnetic resonance fluid fulfils several functions, providing magnetic resonance signals for tracking the catheter (2) and cooling and/or irrigation.
