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?
Preparation varies with the body area, contrast use, and whether sedation is planned. Follow your appointment instructions. You will be asked to remove metal items and may need to change into approved clothing.
Do I need to stop taking medication?
Do not stop prescribed medication unless your clinical team tells you to. Ask about medicine patches, pumps, or wearable devices, and tell the MRI team about all implants, operations, and metal fragments so they can check the exact device and conditions.
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?
Children can have this scan when it is clinically justified. The team will decide whether preparation, sedation, or anaesthesia is needed and explain the separate risks and fasting instructions.
Can I have this scan if I am pregnant?
Noncontrast MR neurography may be performed during pregnancy when clinically needed. It is not automatically prohibited in the first trimester. Gadolinium is not routinely given during pregnancy.
When will I get my results?
A radiologist will review the images and send a report to the referring clinician. Timing varies by centre and urgency, so ask when and how you will receive the result.
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.
Questions to ask your team
- Which nerve and body region will be included?
- Will contrast or a standard MRI sequence be added?
- What can the scan say about the cause and likely recovery of the nerve problem?
Sources and further reading
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.