a probe shaft having a proximal section and a distal section opposite to the proximal section, the distal section being insertable into a patient, the probe shaft being made of a first material having a magnetic susceptibility of less than about 0.001 in S.I. units;

a cryofluid supply tube located within the probe shaft, the cryofluid supply tube being configured to receive a cryofluid from a cryofluid source, the cryofluid supply tube being configured to supply the cryofluid toward the distal section for cooling and/or freezing patient tissue; and

an electrical resistance heater wound around the cryofluid supply tube and comprising resistive elements having counter-wound helical coils located within the probe shaft, the counter-wound helical coils comprising a first set of coils wound in a direction counter to a second set of coils such that the first and second sets of coils are abutting and axially interspaced along the cryofluid supply tube, a number of coils of the first set of coils being balanced by a number of coils of the second set of coils such that when a single current is supplied to the electrical resistance heater, a first magnetic field generated by the first set of coils is counteracted and/or opposite to a second magnetic field generated by the second set of coils, the electrical resistance heater being made of a second material having a magnetic susceptibility less than about 0.0005 in S.I. units, the electrical resistance heater being configured to heat and thereby thaw, and/or cauterize tissue, when current is supplied thereto,

whereby the electrical resistance heater is configured to provide electrical resistive heating of tissue when positioned in a magnet room of a magnetic resonance imaging (MRI) system.