Magnetic resonance imaging is a medical imaging technique that takes detailed pictures of the organs and tissues using magnetic fields and radio waves. MRI scans do not use any radiation.
MRI is commonly used to help detect strokes, heart damage, tumors, brain injuries and other ailments. It can also detect bone and joint abnormalities as well as breast cancer, especially in women with dense breast tissue. MRI is a noninvasive imaging study where a patient is placed on a moveable table that slides into a tube-shaped machine. Sometimes contrast dye is injected before the study to help differentiate tissues on the images.