introduced by the presence of probe 30 within the imaging coil of the mri system within this disclosure the term non ferromagnetic is meant to refer to materials having very low magnetic permeablities and relatively low residual magnetism and hystersis one example of non ferromagnetic materials is copper reference is now made to fig3 which figure illustrates how a tms device can be used in conjunction with an mri system in fig3 an mri system 40 and a tms device 42 are provided mri system 40 may be a siemens vision system magnetic resonance imaging system and typically includes a cylindrical magnet 44 having a bore 46 in which a patient 50 is placed in order to undergo magnetic resonance imaging the mri system includes a sliding platform 48 that the patient 50 lies on an imaging coil 52 typically including a number of pickup coils is provided imaging coil 52 detects the magnetic field generated as a result of exposure of patient 50 to the large magnetic field provided by magnet 44 the signal detected by imaging coil 52 is carried by cable 54 to processing electronics 56 processing electronics 56 process the signals provided by imaging coil 52 to provide a magnetic resonance image of the brain of patient 50 reference is.