What Is a Lumbar Spine X-Ray?
A lumbar spine X-ray is an imaging test that helps your doctor
view the anatomy of your lower back.
The lumbar spine is made up of five vertebral bones. The sacrum
is the bony “shield” at the back of your pelvis. It’s located below the lumbar spine. The
coccyx, or tailbone, is located below the sacrum. The thoracic spine sits on
top of the lumbar spine. The lumbar spine also has:
- large blood vessels
An X-ray uses small amounts of radiation to view your body’s
bones. When focusing on the lower spine, an X-ray can help detect abnormalities,
injuries, or diseases of the bones in that specific area. According to the Mayo Clinic, a lumbar spine X-ray can show whether you
have arthritis or broken bones in your back, but it can't show other problems
with your muscles, nerves, or discs.
Your doctor could order a lumbar spine X-ray for a variety of
reasons. It can be used to view an injury from a fall or accident. It can also
be used to monitor the progression of a disease like osteoporosis or to
determine if a treatment you are having is working.
Why Is a Lumbar Spine X-Ray Performed?
An X-ray is a useful test for many conditions. It can help your
doctor understand the cause of chronic back pain or view the effects of
injuries, disease, or infection. Your doctor may order a lumbar spine X-ray to
- birth defects that affect the spine
- injury or fractures to the lower spine
- low back pain that's severe or lasts for more than four
to eight weeks
which is arthritis affecting the joints
which is a condition that causes your bones to thin
- abnormal curvature or degenerative changes in
your lumbar spine, such as bone spurs
Your doctor might also use other imaging tests along with an
X-ray to determine the cause of your back pain. These can include:
- MRI scans
- bone scans
- CT scans
Each of these scans
yields a different type of image.
The Risks of a Lumbar Spine X-Ray
All X-rays involve exposure to a small amount of radiation. This
is typically harmless, but it’s an important issue if you’re
pregnant or could be pregnant. The amount of radiation used is considered safe
for adults but not for a developing fetus. Be sure to tell your doctor if you’re
pregnant or believe you may be pregnant.
How to Prepare for a Lumbar Spine X-Ray
X-rays are routine procedures that don’t require much
Before the X-ray, you’ll be asked to remove any jewelry and
other metallic items from your body. Tell your doctor if you have any metal
implants from prior surgeries. Most likely, you’ll change into a
hospital gown to prevent any buttons or zippers on your clothes from affecting
the quality of the X-ray images.
How a Lumbar Spine X-Ray Is Performed
X-rays are performed in a hospital’s radiology department
or at a clinic that specializes in diagnostic procedures.
Usually, you will start by lying down on a table, facing up. A
technician will move a large camera connected to a steel arm over your lower
back. A film inside the table below you will capture the X-ray images of your
spine as the camera moves overhead.
The technician may ask you to lie in several positions during
the test, including on your back, side, stomach, or even standing depending on
what views your physician has requested.
While the images are taken, you’ll have to hold your
breath and remain still. This ensures that the images are as clear as possible.
After a Lumbar Spine X-Ray
After the test, you can change back into your regular clothes
and go about your day right away.
Your radiologist and doctor will review the X-rays and discuss
their findings. Results from your X-ray may be available the same day.
Your doctor will determine how to proceed depending on what the
X-rays show. They may order additional imaging scans, blood tests, or other
tests to help make an accurate diagnosis.