MR Neurography – Targeted MRI for Nerves and Nerve Plexus

Magnetic resonance imaging (MRI) is a proven method for visualising the inside of the body in high resolution and without radiation. For the examination of peripheral nerves, there is a specialised technique: MR neurography. It makes even small changes within nerve tissue visible – provided the target area is known beforehand.

What is MR Neurography?

MR neurography is a special type of MRI scan. Using dedicated sequences, individual nerves or entire nerve plexuses can be shown in detail. This makes it possible to detect injuries, inflammation, scar tissue or tumours.
A major advantage: The examination is radiation-free, the images can be stored and assessed by various specialists together. This helps to narrow down the cause of symptoms more precisely and objectively.

MRI scanner for visualizing nerve structures and soft tissues – modern imaging for diagnosing nerve damage. — MRI delivers high-resolution images of soft tissues, whereas MR neurography is specifically designed for detailed nerve imaging and diagnosis.

Important: Only targeted examination is useful

Unlike ultrasound, MR neurography is a static imaging method. This means: Only the body region defined beforehand is scanned – there is no general “search” for nerve damage throughout the body. That is why an exact preliminary diagnosis is so important. This is usually based on:

a detailed medical history,
a thorough clinical examination,
and often additional tests such as high-resolution ultrasound or nerve conduction studies (EMG/nerve conduction).

Only if it is clear where a nerve might be damaged can MR neurography be used in a targeted way.

Especially helpful for deep-lying nerves

The strengths of MR neurography lie particularly in visualising deep nerve sections that cannot be reached well by ultrasound. These include, for example:

Depiction of the brachial plexus on the left side. Central view of the collarbone. — The brachial plexus forms from the nerve roots of the lower cervical spine and runs beneath the collarbone towards the armpit.

Source

Plexus brachialis – the network of arm nerves near the neck, shoulder and armpit.
Plexus lumbosacralis – the lumbar-sacral nerve plexus deep in the pelvis.
Nerve roots along the spine – in the cervical, thoracic or lumbar region.

This makes it possible to clarify unclear weakness, radiating pain, suspicion of tumours or inflammation in these areas.

When does MR neurography make sense?

MR neurography is used when other tests alone are not sufficient to clarify the cause of nerve pain, numbness or weakness. Typical questions are:

Is there a slipped disc pressing on a nerve root?
Is a nerve within a plexus injured or inflamed?
Are there scars or tumours deep inside the body that could compress a nerve?

How the examination works

The scan usually takes about 30 to 60 minutes and is completely painless. You lie comfortably in the MRI scanner while the area being examined is covered with a special coil. In some cases, a contrast agent is used to make certain structures more visible.

The image data is saved and assessed by radiologists and, if necessary, by neurologists or neurosurgeons together.

An addition, not a replacement

MR neurography does not replace a thorough clinical examination or high-resolution ultrasound and nerve function tests (nerve conduction studies/EMG). It is an additional specialised method that can be very helpful when other tests alone do not provide enough information.

Abstract illustration of nerve imaging: on the left an ultrasound probe with image, on the right an MRI scanner with a longitudinal nerve depiction. — Ultrasound and MR neurography can both provide important and complementary insights into nerve assessment.

If MR neurography is advisable in your case, your doctor will refer you to a radiology practice or a hospital department with the necessary specialised equipment.

Frequently Asked Questions about MR Neurography

Where is MR neurography available?
MR neurography is a specialised scan usually offered by larger radiology practices or hospital radiology departments. Not every MRI machine is suitable for it – that’s why a specific referral is needed.

When does MR neurography make sense?
Whether MR neurography is appropriate is decided by the treating specialist. A detailed consultation, careful examination and – if needed – additional tests such as ultrasound or nerve conduction studies are important beforehand. The better the radiologist knows where the problem may be, the more targeted and meaningful the scan can be.

Is contrast always needed?
No. A contrast agent is only used if necessary, for example when a tumour or inflammation is suspected. The radiologist decides individually in each case.

Do I need a referral?
Yes. MR neurography is generally arranged by your treating specialist – usually a neurologist, neurosurgeon or orthopaedic doctor. This ensures that the examination is well prepared and that the right area is scanned.