Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a technique in which images are obtained using magnetic fields.
The MRI has revolutionized the way patients (especially with neurological problems) are diagnosed and treated over the last decade. Moreover MRI is much safer and offers much more detail than the previously available technique (CAT scans). It is however more expensive and more time consuming.
During a MRI exam the patients are kept in a strong magnetic field. Changes in the magnetic field induce changes in the water molecules in the body. The body too transmits very weak magnetic waves. The machine then picks up signals sent by the molecules in the body. These signals are then filtered, amplified and analyzed producing extremely detailed and accurate images.
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