Bone health
DEXA bone density scan
A low-dose scan that measures bone density at the hip and spine to diagnose osteoporosis before a fracture happens.
Key facts
At a glance
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Preparation: minimal - avoid calcium supplements for 24 hours beforehand and mention any recent barium or contrast scans.
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On the day: you lie on an open table, fully clothed if free of metal, while a scanner arm passes over your hips and lower spine for 10-20 minutes.
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Radiation: the dose is tiny - far lower than a standard X-ray and a fraction of daily background radiation.
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Results: T-scores and Z-scores are reported by a specialist, typically within a few working days privately.
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Follow-up: your GP, a rheumatologist or a metabolic bone specialist interprets the scores alongside your fracture risk and advises on treatment.
The full picture
What this test involves, and how to get it
A DEXA (dual-energy X-ray absorptiometry) scan is the standard test for measuring bone mineral density. It scans the hip and lumbar spine - the sites that matter most for fracture risk - and produces a T-score comparing your bones with those of a healthy young adult. The scan is open, quiet and comfortable: you lie on a padded table while a detector arm passes over you. There are no tunnels and no injections, and the radiation dose is among the lowest of any X-ray-based test. Results place you in the normal, osteopenia or osteoporosis range.
On the NHS, DEXA is arranged when your GP identifies risk factors - a previous fracture, early menopause, long-term steroid use or a strong family history - and waits vary by region. Privately, scans are usually available within one to two weeks and can be self-referred at many centres, making them a practical option around menopause or after a fracture that raises questions. The report should always be interpreted with a clinician, because treatment decisions rest on your overall fracture risk, not the T-score alone.
A quiet reminder
This guide is for information, not medical advice.
Your own clinician knows your history and can tell you which parts apply to you. Next review of this page: 2027-09-27.
Frequently asked
Common questions about DEXA bone density scan.
Quick, plain-English answers to what people ask us most.
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What is DEXA bone density scan and what does it show?
DEXA bone density scan is an imaging or diagnostic procedure that allows doctors to look at the relevant part of the body in detail, helping to identify or rule out specific problems. It gives information that usually can't be obtained from a physical examination or blood test alone. The findings are interpreted alongside your symptoms and medical history.
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Why might a doctor request it?
It's usually requested to investigate specific symptoms, follow up on a previous finding, or check on a known condition. It may also form part of a wider screening or health assessment package. Your doctor will explain what they're hoping to see or rule out before referring you.
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Do I need to prepare beforehand?
Preparation varies — some procedures require fasting, a full or empty bladder, stopping certain medications, or avoiding specific products beforehand, while others need no preparation at all. Because requirements are specific to this exact procedure, always follow the instructions given by the clinic at booking rather than assuming. Arriving properly prepared reduces the chance of the appointment needing to be rescheduled.
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What happens during the procedure?
You'll usually be guided through each step by trained staff, and most of these procedures are performed with you either lying still, seated, or in a specific position for a short period. Depending on the exact test, it may take anywhere from a few minutes to around an hour. Staff will explain what to expect and answer any questions before you begin.
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Is it painful, and are there any risks?
Many imaging procedures are painless or involve only mild, brief discomfort, though some more invasive tests may involve sedation or a small associated risk that will be explained beforehand. Serious complications are uncommon with modern techniques and experienced practitioners. You'll be given specific information about risks relevant to your particular procedure and health background before you consent.
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How long does it take to get results?
Results are typically reviewed by a specialist and reported within a few working days, though timeframes can vary depending on complexity. Some findings may be discussed with you immediately after the procedure, with a full written report to follow. The clinic will confirm the expected timeframe when you book.
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What happens if something abnormal is found?
If the results show something unexpected, a specialist will explain what it means and recommend appropriate next steps, which might include further imaging, a biopsy, or referral to a relevant specialist. Many abnormal findings turn out to be minor or unrelated to any symptoms once fully assessed. You'll be talked through the findings rather than left to interpret a report alone.
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Is this available on the NHS, or is private quicker?
This type of procedure is generally available on the NHS, but routine referrals can involve a wait for both the appointment and the results. Private providers typically offer appointments within days and results reviewed by a specialist soon after, which can be helpful if you want quicker reassurance or a second opinion. Cost for private testing varies by provider.
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How accurate is this type of test?
When performed by trained specialists on appropriate equipment, this is generally considered a reliable and clinically well-established investigation. As with any single test, results are best interpreted alongside your symptoms and other findings rather than in isolation. If a result is unclear or unexpected, further imaging or a repeat test may be recommended.
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How do I book DEXA bone density scan privately?
You can usually book directly with a private clinic, often without needing a GP referral, with appointments typically available within a matter of days. It's worth asking about preparation requirements and what the appointment will involve when you book. Contact the clinic for current availability and to discuss any specific concerns.