Radiology• Updated 21 October 2026
MRI Scan
A scan that uses a strong magnet and radio waves to make detailed pictures, especially of the brain, spine, joints and soft tissues.
Results: Usually a few days
Quick Summary
Primary Purpose
To look at the brain, spine, joints, muscles and organs in detail.
What It Measures
Detailed images of soft tissues.
Preparation
Remove all metal. Tell staff about pacemakers, implants, metal fragments, pregnancy or claustrophobia.
Overview
MRI doesn't use radiation.
It's noisy and takes longer than CT, usually 20–60 minutes.
What It Measures
Brain and spine
Stroke, MS, tumours, slipped discs.
Joints and soft tissues
Ligaments, cartilage and muscles.
How It's Performed
- 01
Safety check
A questionnaire about metal and implants.
- 02
Scan
Lie still inside the scanner; you'll hear loud knocking and get ear protection.
- 03
Afterwards
Return to normal activities.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- MRI Scans(opens in a new tab) · MedlinePlus, US National Library of Medicine
- MRI scan(opens in a new tab) · NHS