Back and spine MRI: what to expect

It does not use ionising radiation. A clinician may request it when symptoms, examination findings or treatment progress suggest that a closer view of spinal structures could change care.

MRI can show disc changes, narrowing around nerves, inflammation, injury, infection or a mass. Image findings must be interpreted alongside your symptoms and physical examination because some visible changes may not be causing pain.

The report describes what the radiologist sees; your treating clinician explains whether those findings account for pain, weakness, numbness or altered movement and whether they affect the treatment plan.

Tell the imaging team before the appointment about a pacemaker, implanted device, metal fragments, previous surgery, pregnancy, kidney problems, allergies or severe claustrophobia. Bring relevant prior images and remove metal items when instructed.

You lie still on a moving table while the scanner makes loud tapping sounds. You can communicate with the radiographer throughout. Some examinations use an injected contrast agent; the team will explain why it is proposed and check whether it is suitable for you.

Seek urgent medical assessment for new loss of bladder or bowel control, numbness around the groin or saddle area, rapidly worsening leg weakness, or severe back pain after significant trauma. Fever with severe back pain, or back pain in someone who is seriously unwell, also needs prompt assessment.

Do not delay urgent evaluation while waiting for a routine scan appointment. A clinician can decide which examination and imaging are appropriate at that time.

Ask which part of the spine will be scanned, what clinical question the MRI should answer, whether contrast is expected, and how the result could alter treatment. You can also ask when and how results will be discussed and whether prior scans are needed for comparison.