A cochlear implant arrangement comprising: an implantable electrode lead containing a plurality of electrode wires each having a terminal end forming an electrode contact configured to deliver electrode stimulation signals carried by the electrode wires to adjacent auditory neural tissue for perception as sound by an implanted patient; an implantable stimulator coupled to the electrode lead and configured to process an implant communications signal received from an external transmitter device to produce the electrode stimulation signals for the plurality of electrode wires; a magnetic resonance imaging telemetry module coupled to the implantable stimulator and the electrode lead; and an MRI telemetry link configured to transmit an MRI telemetry signal from the MRI telemetry module to an external telemetry monitor; wherein the MRI telemetry module is configured to: i. measure electrode current induced in the electrode lead during an MRI process performed on the implanted patient; ii. output to the external telemetry monitor the MRI telemetry signal based on the measured electrode current, the arrangement is characterized in that the said module is further configured to: iii. determine a tissue temperature signal, from the MRI telemetry signal as a function of the measured electrode current, to indicate tissue heating occurring at the electrode contacts from the MRI process. an implantable electrode lead containing a plurality of electrode wires each having a terminal end forming an electrode contact configured to deliver electrode stimulation signals carried by the electrode wires to adjacent auditory neural tissue for perception as sound by an implanted patient; an implantable stimulator coupled to the electrode lead and configured to process an implant communications signal received from an external transmitter device to produce the electrode stimulation signals for the plurality of electrode wires; a magnetic resonance imaging telemetry module coupled to the implantable stimulator and the electrode lead; and an MRI telemetry link configured to transmit an MRI telemetry signal from the MRI telemetry module to an external telemetry monitor; wherein the MRI telemetry module is configured to: i. measure electrode current induced in the electrode lead during an MRI process performed on the implanted patient; ii. output to the external telemetry monitor the MRI telemetry signal based on the measured electrode current, the arrangement is characterized in that the said module is further configured to: iii. determine a tissue temperature signal, from the MRI telemetry signal as a function of the measured electrode current, to indicate tissue heating occurring at the electrode contacts from the MRI process. i. measure electrode current induced in the electrode lead during an MRI process performed on the implanted patient; ii. output to the external telemetry monitor the MRI telemetry signal based on the measured electrode current, the arrangement is characterized in that the said module is further configured to: iii. determine a tissue temperature signal, from the MRI telemetry signal as a function of the measured electrode current, to indicate tissue heating occurring at the electrode contacts from the MRI process.