What is Magnetic Resonance Imaging? 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 radio waves like the kind that transmit your favorite FM music. The combination of radio waves and magnetic fields produce detailed images of the body structures such as the brain, the spine and other vital organs.

How does an MRI 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 magnetic field much like a compass points to the North Pole. Radio waves tuned to a specific frequency tip these tiny magnets away from the magnetic field. As they tip, they gain energy. When the radio waves 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 to 15 minutes, with a complete exam running 20 to 60 minutes. During this time, dozens of images may be obtained.

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

What can you expect during an MRI exam? Although MRI is a very advanced medical technique, the MR exam is probably one of the easiest and most comfortable exams you may ever experience.

The technologist will simply ask you to lie down on a cushioned table, which will automatically move into the magnet after you have been comfortably positioned for scanning. The technologist will leave the magnet room, but you will have constant contact with him or her during the entire exam.

When the MR scan begins, you will hear a muffled thumping sound, which will last for several minutes. Just relax – even take a nap – but try to lie as still as possible, since any movement during this time will blur the picture. Other than sound, you should experience no other sensation during scanning. When the scanning is complete, the technologist will return to assist you off the table.

Patient Checklist for MRI

Prior to your exam, please review the following checklist:

• Please bring previous X-rays applicable to the exam. The radiologist may want to review them (Example: If you have are having an MRI of the knee, please bring any previous X-rays of your knee).
• If you think you may be claustrophobic, ask your doctor to prescribe medication prior to the exam. If you do receive medication, please bring someone with you to the exam that will be able to drive you home, as you will not be able to drive yourself.
• You CAN take any medication you may currently be taking. It is not necessary to stop taking it prior to the exam. In fact, the exam will be much more comfortable if you continue to take your medication.
• You CAN eat and drink prior to the exam.
• You CANNOT have the exam if you have any of the following:
  • Cerebral aneurysm clips
  • Certain heart valves
  • Cochlear implants
  • Metal filings in the eye
  • Pacemaker
• You will be asked a series of questions concerning your surgical and occupational background. If this history includes metalwork (welders, grinders, etc) or metal implants, please be sure to tell the technologist prior to your exam. Preliminary X-rays may need to be taken.
• Relax and don’t worry about the exam. We will make sure you receive the high quality, professional care you deserve.