MR neurography is an advanced, high-resolution MRI scan designed specifically to create detailed images of the body's peripheral nerves. While standard MRI scans show bones, muscles, and organs, MR neurography uses specialized settings to suppress surrounding tissues, making the nerves stand out in sharp contrast.
This scan is typically ordered when a patient has chronic pain, numbness, or weakness, and doctors need to locate exactly where a nerve is pinched, swollen, or damaged.
Common Indications for MR Neurography
- Investigating unexplained nerve pain, numbness, or weakness in the limbs.
- Locating nerve compression (such as piriformis syndrome or brachial plexus injuries).
- Evaluating nerve damage or tears after trauma or accidents.
- Checking for tumors or masses growing on nerves (neuromas).
- Assessing nerve regeneration or healing after surgery.
What exactly does MR neurography show?
The scan shows a high-contrast, three-dimensional view of the peripheral nerves. It highlights any swelling, inflammation, abnormal nerve paths, or compression caused by surrounding muscles, scar tissue, or bone spurs.
How should I prepare for MR neurography?
No fasting or special prep is required. You will be asked to remove all metal jewelry, hairpins, and glasses before entering the MRI room. Wear comfortable, loose, metal-free clothing.
Do I need to stop taking medication?
No. Continue taking all your medications as normal. You must notify the team if you have any metallic implants, such as pacemakers, joint replacements, or shrapnel.
What happens when I arrive for my scan?
You will change into a gown. The radiographer will help you lie down on the MRI scanner table. They will place a specialized imaging coil over the area being scanned (such as your shoulder, pelvis, or limb) and give you earplugs or headphones to protect your ears from the scanner's loud tapping noises.
How is the procedure performed?
The table will slide into the scanner. The radiographer will operate the machine from the next room. You must lie completely still during the scan, which will make loud whirring and knocking sounds at regular intervals. In some cases, a standard contrast dye may be injected into your arm vein toward the end of the scan to highlight areas of nerve inflammation.
How long does MR neurography take?
Because high-resolution nerve imaging is complex, the scan takes about 45 to 60 minutes.
Is there any discomfort?
The scan itself is painless. You only need to lie still on the padded table. If contrast dye is needed, you will feel a brief pinch from the needle in your arm.
Are there risks?
No. MRI does not use radiation. If contrast dye is used, there is a very small risk of an allergic reaction or kidney strain, which is pre-screened with a blood test.
Can children have this scan?
Yes. Children with nerve injuries (such as birth-related brachial plexus palsy) can have this scan safely.
Can I have this scan if I am pregnant?
Yes, but contrast dye is avoided during pregnancy. The scan is typically scheduled after the first trimester as a precaution.
When will I get my results?
A radiologist specializing in nerve imaging will review the scans. A report will be sent to your referring doctor within 24 hours.
What if the scan finds something?
If the scan identifies nerve compression or scarring, your referring doctor (often a neurologist or neurosurgeon) will discuss targeted treatments, which can include nerve block injections, physical therapy, or surgical decompression.
Conclusion
MR neurography is a powerful, non-invasive way to locate nerve issues deep inside your body. To ensure a clear scan, remember to discuss any metal implants with the team and remain completely still during the loud imaging sequences.