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MRI Scan
An MRI (magnetic resonance imaging) scan uses strong magnets and radio waves — not radiation — to make very detailed images, especially of soft tissues like the brain, spine, joints and organs.
Causes & risk factors
- To look at the brain and spinal cord in detail
- To assess joints, ligaments and soft tissues
- To investigate the liver, pelvis and other organs
- To find or stage some cancers
- To look at blood vessels
- When detailed soft-tissue images are needed without radiation
Common symptoms
- Persistent back pain with nerve symptoms
- Numbness or tingling
- Joint problems
- Persistent headaches (in some cases)
Tests & diagnosis
- How MRI works
- CT scan as an alternative in some cases
- Ultrasound for some soft-tissue questions
Treatment & management
- You lie still inside a tunnel-shaped scanner
- It is painless but noisy, and can take 20–60 minutes
- It uses no radiation
- A contrast dye may be given to show more detail
- Tell staff about any metal implants, a pacemaker, or if you might be pregnant
When to see a doctor urgently
- When detailed images of the brain, spine or joints are needed
- To investigate nerve symptoms or persistent joint problems
- When your specialist requests it for diagnosis or staging
Frequently asked questions
Is an MRI safe?
Yes. MRI uses magnets and radio waves, not radiation. The main precautions are around metal — tell staff about any implants, a pacemaker or metal fragments, as the magnet is very strong.
Will I feel claustrophobic in the scanner?
Some people do, as the scanner is a narrow tunnel and can be noisy. Tell the team beforehand — they can offer support, and in some cases a more open scanner or medication to help you relax.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.