Detailed Imaging for the Spine and Nerves
When MRI does not provide enough information, a CT myelogram can offer a more detailed look at the spinal canal, nerves, and surrounding structures.
This specialized imaging study helps identify areas where nerves may be compressed and can provide important information for diagnosis and surgical planning.
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What Is a CT Myelogram?
A CT myelogram is an advanced imaging test that combines:
Contrast dye injection into the spinal fluid space
and
CT imaging
The contrast outlines the spinal cord and nerve roots, allowing for highly detailed images of areas that may not be clearly seen on MRI alone.
Why Might I Need a CT Myelogram?
Your physician may recommend this test if:
- MRI results are unclear
- You cannot undergo MRI
- Prior spine surgery limits MRI quality
- There is concern for nerve compression
- More detailed surgical planning is needed
What Conditions Can It Help Diagnose?
A CT myelogram can help evaluate:
- Herniated discs
- Spinal stenosis
- Nerve root compression
- Bone spurs
- Failed prior spine surgery
- Cerebrospinal fluid leaks
- Complex spinal anatomy
What to Expect During the Test
The procedure is typically completed in two steps:
Contrast Injection
A radiologist places a small needle into the lower back to inject contrast dye into the spinal fluid space.
CT Imaging
You then undergo a CT scan to capture detailed images of the spine.
The entire process usually takes 60–90 minutes.
Why This Test Matters in Spine Care
A CT myelogram can provide critical information when planning treatment.
It helps:
✓ Identify exactly where nerves are compressed
✓ Clarify findings when MRI is limited
✓ Guide surgical decision-making
✓ Improve diagnostic accuracy
Risks
CT myelograms are generally safe, though potential risks include:
- Temporary headache
- Mild soreness at the injection site
- Nausea
- Rare allergic reaction to contrast
- Rare infection or spinal fluid leak
Your care team will review all risks and instructions before the procedure.