LAB TEST
Lumbar MRI scan
A lumbar magnetic resonance imaging (MRI) scan uses energy from strong magnets to create pictures of the lower part of the spine (lumbar spine). An MRI does not use radiation (x-rays). Single MRI images are called slices. The images can be stored on a computer or printed on film. One exam produces many images. Related exams include: Cervical MRI scan (neck MRI) MRI
How the Test is Performed
You will wear a hospital gown or clothes without metal snaps or zippers (such as sweatpants and a t-shirt). Make sure you take off your watch, jewelry and watches. MRIs can pull on any metallic objects. Some types of metal can cause blurry images. You will lie on a narrow table that slides into a large tunnel-like…
How to Prepare for the Test
You may be asked not to eat or drink anything for 4 to 6 hours before the scan. Tell your health care provider if you are afraid of closed spaces (have claustrophobia). You may be given a medicine to help you feel sleepy and less anxious. Your provider may suggest an "open" MRI, in which the machine is not as close to…
How the Test will Feel
An MRI exam causes no pain. You will need to lie still as too much movement can blur MRI images and cause errors. The table may be hard or cold, but you can ask for a blanket or pillow. The machine makes loud thumping and humming noises when turned on. You can wear ear plugs to help block out the noise. An intercom in…
Why the Test is Performed
The most common reasons for this test are: Low back or pelvic pain that does not get better after treatment Leg weakness, numbness, or other symptoms that do not improve or get worse Your provider may also order a lumbar MRI if you have: Back pain and fever Birth defects of the lower spine Injury or trauma to the…
Normal Results
A normal result means your spine and nearby nerves look OK.
What Abnormal Results Mean
Most of the time, abnormal results are due to: Herniated or "slipped" disk ( lumbar radiculopathy ) Narrowing of the spinal column ( spinal stenosis ) Abnormal wearing on the bones and cartilage in the spine (lumbar spondylosis) Other abnormal results may be due to: Degenerative changes due to age Ankylosing…
Risks
MRI uses no radiation. There have been no reported side effects from the magnetic fields and radio waves. It is also safe to have MRI performed during pregnancy. No side effects or complications have been proven. The most common type of contrast (dye) used is gadolinium. It is very safe. Allergic reactions to this dye…
References
Chou R, Qaseem A, Owens DK, Shekelle P; Clinical Guidelines Committee of the American College of Physicians. Diagnostic imaging for low back pain: advice for high-value health care from the American College of Physicians. Ann Intern Med . 2011;154(3):181-189. PMID: 21282698 pubmed.ncbi.nlm.nih.gov/21282698/ . Sack KD,…
This is a summary. Read the full article at www.ucsfbenioffchildrens.org (reviewed 24/04/2023).
This page is general information and is not medical advice. It does not replace a registered doctor, and it is not a prescription or a recommendation to use any medicine or test. Prices are listed prices and may change. Always follow the advice of your doctor or pharmacist.