Magnetic resonance imaging (MRI) uses a combination of a magnetic field, radiofrequencies, and a computer to create images of the organs and other internal structures within the body. Unlike conventional x-ray and computed tomography (CT) scans, MRI does not depend on radiation.

An MRI technologist explains the procedure to you and asks you several questions about your medical history. Some MRI examinations require an intravenous (IV) contrast injection of contrast media, called gadolinium to enhance the results of your study. Total examination times vary from 30 minutes to 1 hour or more depending on the information needed. It is normal to hear intermittent humming and thumping sounds. You are given or you may request earplugs to reduce the noise of the MRI scanner. You are alone in the exam room during the MR imaging, however, the technologist sees, hears and speaks with you at all times using a two-way intercom.

Your physician provides you with detailed instructions on how to prepare for your procedure. For your safety, each MRI appointment requires you to complete a screening to identify any condition you may have that could prevent a MRI examination. MRI is a safe procedure for most patients, although patients who have pace makers, cochlear implants, or aneurysms clips should check with their physician before undergoing MRI. If you know that you suffer from claustrophobia, contact your physician to discuss the possibility of prescribing a mild sedation before your MRI examination.

A radiologist, a physician specially trained to diagnose conditions and diseases, interprets the results of the exam. The radiologist sends an interpretation of your results to your primary care physician. Your doctor discusses these results with you and explains what they mean in relation to your health.

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