Magnetic Resonance Imaging is a modern computerized method of scanning, creating images using a strong magnetic field and radio waves. The hydrogen atoms in the patient's body react to the magnetic field and emit signals which are analyzed by a computer to produce images. The images obtained help in detecting various abnormalities in the tissues scanned.

• MRI is painless and has no known side effects.

• It usually reveals more details than other imaging modalities. Usually there is a clear distinction between healthy and diseased tissue on MRI.

• Harmful effects of radiation are avoided.

• MRI has been extensively tested by the Food and Drug Administration, U.S.A., in the early '80s, before being put to clinical use.

• No short term effects have yet been found.

• Though the use of magnetic fields is not thought to be harmful, long term effects are unknown.

• Contraindications may include the presence of pacemakers, neurostimulators, inner ear or cochlear implants and certain artificial heart valves and metallic implants.