Definition of Cervical spine CT scan:

A computed tomography (CT) scan of the cervical spine is an imaging method that uses x-rays to create cross-sectional pictures of the neck.

How the test is performed:

You will be asked to lie on a narrow table that slides into the center of the CT scanner.

Once you are inside the scanner, the machine's x-ray beam rotates around you. (Modern "spiral" scanners can perform the exam without stopping.)

A computer creates separate images of the body area, called slices. These images can be stored, viewed on a monitor, or printed on film. Three-dimensional models of the cervical spine can be created by stacking the slices together.

You must be still during the exam, because movement causes blurred images. You may be told to hold your breath for short periods of time.

The scan should take only 10-15 minutes.

How to prepare for the test:

Certain exams require a special dye, called contrast, to be delivered into the body before the test starts. Contrast helps certain areas show up better on the x-rays.

Contrast can be given in different ways:

• It may be delivered through a vein (IV) in your hand or forearm.
• It may be given as an injection into the space surrounding the spinal cord.

If contrast is used, you may also be asked not to eat or drink anything for 4-6 hours before the test.

Let your doctor know if you have ever had a reaction to contrast. You may need to take medications before the test in order to safely receive this substance.

Before receiving the contrast, tell your health care provider if you take the diabetes medication metformin (Glucophage) because you may need to take extra precautions.

If you weigh more than 300 pounds, find out if the CT machine has a weight limit. Too much weight can cause damage to the scanner's working parts.

You will be asked to remove jewelry and wear a hospital gown during the study.

How the test will feel:

Some people may have discomfort from lying on the hard table.

Contrast given through an IV may cause a slight burning sensation, a metallic taste in the mouth, and a warm flushing of the body. These sensations are normal and usually go away within a few seconds.

Why the test is performed:

CT rapidly creates detailed pictures of the body, including the cervical spine. The test may be diagnose or detect:

• Birth defects of the cervical spine in children
• Spine problems, when a spine MRI cannot be used
• Injury to the upper spine
• Bone tumors and cancers
• Broken bone