How To Prepare

In general, there's nothing you have to do before this test, unless your doctor tells you to.

Tell your doctor if you get nervous in tight spaces. You may get a medicine to help you relax. If you think you'll get this medicine, be sure you have someone to take you home.

How It Feels

You won't have pain from the magnetic field or radio waves used for the MRI test. You may be tired or sore from lying in one position for a long time.

If a contrast material is used, you may feel some coolness when it is put into your I.V.

In rare cases, you may feel:

• Tingling in the mouth if you have metal dental fillings.
• Warmth in the area being checked. This is normal. Tell the technologist if you have nausea, vomiting, a headache, dizziness, pain, burning, or breathing problems.

Risks

There are no known harmful effects from the strong magnetic field used for an MRI. But the magnet is very powerful. It may affect any metal implants or other medical devices you have.

Risks from contrast material

Contrast material that contains gadolinium may be used in this test. But for most people, the benefit of its use in this test outweighs the risk. Be sure to tell your doctor if you have kidney problems or are pregnant.

There is a slight chance of an allergic reaction if contrast material is used during the test. But most reactions are mild and can be treated using medicine.

If you breastfeed and are concerned about whether the contrast material used in this test is safe, talk to your doctor. Most experts believe that very little dye passes into breast milk and even less is passed on to the baby. But if you are concerned, you can stop breastfeeding for up to 24 hours after the test. During this time, you can give your baby breast milk that you stored before the test. Don't use the breast milk you pump in the 24 hours after the test. Throw it out.

Results

The radiologist may discuss some of the results of the MRI with you right after the test. Complete results are usually ready for your doctor in 1 to 2 days.

Normal:

• The bones of the spine, discs, and nerves are normal.
• No tumors, inflammation, or areas of nerve damage in the spine are present.
• No disease or bone loss in the spine is present.
• No ruptured discs are present. There are no structures pressing on a nerve.
• No structural problems that have been present from birth (congenital problems) are found.

Abnormal:

• Tumors, inflammation, or areas of nerve damage in the spine are present. A disease of the spinal cord, such as multiple sclerosis, is found.
• Narrowing of the spinal canal (spinal stenosis) is present.
• Broken bones or bone loss in the spine caused by injury or disease, such as arthritis, is found.
• One or more discs of the spine are bulging or ruptured or pressing on a nerve.
• A condition that has been present from birth (congenital condition) is found in the spine or the vertebrae.