Magnetic Resonance Imaging, or MRI, is an advanced, state-of-the-art method, which produces very clear pictures, or images, of the human body without the use of X-rays.  This technology enables physicians to detect developing diseases or abnormalities earlier than ever before.  MRI uses a powerful, but harmless, magnetic field and radiowaves, like the kind that transmit your favorite FM music.  The combination of radiowaves and magnetic field produce detailed images of body structures such as the brain, the spine, and other vital organs.

How does MR work?  The human body is made up of millions of atoms, which are magnetic.  When placed in a magnetic field, these atoms line up with the field, much like compass points to the North Pole.  Radiowaves, tuned to specific frequency, tip these tiny magnets away from the magnetic field.  As they tip, they gain energy.  When the radiowaves are turned off, the atoms try to realign with the magnetic field, releasing the energy they gained as very weak radio signals.  A powerful antenna picks up these signals and sends them to the computer, which performs millions of calculations to produce an image for diagnosis.  

The average MR scan takes 5-15 minutes, with a complete exam running 20-60 minutes.  During this time, several dozen images may be obtained.  

The MR exam poses no risks to the average patient if appropriate safety guidelines are followed.  If you have any questions regarding the MR exam, please be sure to discuss them with your doctor.