Radio Frequency

The radio frequency power that is capable of being produced matches that of many small radio stations (15-20 kW). As a result there is the presence of heating effects from the RF. In most pulse sequences, the heating is insignificant and does not exceed the FDA guidelines. New pulse sequences such as for echo planar imaging and some spectroscopy localization techniques are capable of exceeding the FDA guidelines. Monitoring of the power deposition in patients is a requirement for FDA approval of clinical MRI scanners.
Potential for electrical shock exists with RF coils so proper grounding and insulation of coils is necessary. Any damage to coils or their cables needs prompt attention. Also looping of the cable to a coil can result in burns to patients that come into contact with them. It is best to avoid all contact with the RF coil cables.