MRI and MRA (Magnetic Resonance Imaging/Angiography)

MRI Brain

Your doctor has referred you for a diagnostic study known as Magnetic Resonance Imaging (MRI).

  • It is an efficient, comfortable outpatient procedure which gives your doctor information to better evaluate your condition.
  • MR imaging produces detailed pictures by using a magnetic field, radio waves and sophisticated computer processing.
  • Magnetic resonance (MR) imaging is now the preferred method for assessing many parts of the body, including the brain, joints and spine.

How MR Imaging Works:

  • In MR imaging, the body is placed in the magnetic field of the MR machine. Radio waves are then directed to the portion of the body being studied.
  • The MR computer reads the radio waves leaving the body and processes them into digital picture form (images). The images are recorded on film to become part of your medical record. These pictures are then analyzed by one of the radiologists at our center and sent, along with a written report, to your physician.

Precautions:

  • There are several circumstances under which MR imaging should not be done, and there are precautions which must be observed in other cases. Before your examination, you will be asked whether or not you have any of the following:
    Cardiac Pacemaker, Defibrillator, Cerebral aneurysm clips, insulin pump, cochlear implants, neurostimulator, metal in the eyes, or if you are currently pregnant.

Preparing for the exam:

  • No advance preparation is required. Eat normally and take any medication as usual, unless your doctor has given you other instructions.

What to expect:

  • You will be asked to remove jewelry, your watch, credit cards, dentures, hearing aids and any metal objects which could be affected by the magnetic field. In addition, you will be asked to change into comfortable clothing that we will provide for the examination.
  • In the imaging room, you will be positioned on a softly padded table which will be moved into the MR machine by the technologist.
  • Depending on the part of your body which is being studied, a small device (coil) will be placed over or underneath you. This is not constricting, and it acts as a receiver for the radio waves produced by the MR machine.
  • If only a single part of your body (for example, your head, back or knee) is being studied, the examination usually takes 30-45 minutes. You will hear a rhythmic thumping noise and may feel a slight vibration, but there should be no other physical sensations.
  • Throughout your exam, you will be able to hear and speak to your technologist. While the space in the MR machine is adequate for most individuals, some people may feel uncomfortable in it. If you have problems in confined areas or claustrophobic, please call us in advance to talk about this.
  • Occasionally a patient will need a moderate sedative to be comfortable in the MR machine. Your referring physician will give you a prescription with instructions on how to take it. You will need to make arrangements for someone to drive you to our facility and back home.
  • Your job during the examination is simply to relax and not move. The quality of your MR study depends very much on your ability to hold still. Just like a picture photograph, the medical image will blur if you move.
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