Magnetic resonance imaging is very safe. There are no health risks associated with the magnetic field or radio waves used by the machine.
However, some special circumstances limit the use of a magnetic field, so it is important for you to tell us if any of the following apply to you or someone accompanying you into the exam room:
Any metallic substance on your person can affect the quality of the diagnostic images. It can also cause discomfort or injury to you when placed in the magnetic field, and may exclude you from the exam.
Also, be sure to tell us if you are pregnant.