Safety issues in MRI

In general, MRI is a safe method if used with indispensable precaution. The long-term effects of a static magnetic field on human tissue at typical diagnostic field strengths are not known, but the topic remains somewhat controversial due to sparse scientific data [1, 2]. However, there are additional possible sources of risk, which have the potential for harm if the technique is used imprudently. Continuous technician training, consistent patient instruction, society recommendations [3] and safety protocols implemented by vendors have contributed to the wide acceptance and mostly uneventful use of MRI. This chapter aims to introduce the clinician to the relevant safety issues and precautionary measures relating to MRI use. The necessary physical background will be introduced for each safety topic. Also, perceived uncertainties by referring physicians and staff regarding medical implants and the use of contrast agents will be addressed. Consequently, this chapter should enable physicians to confidently triage and advise patients scheduled for MRI.