What Is a DEXA Scan and How Does It Work?
A DEXA (Dual-Energy X-ray Absorptiometry) scan is a medical imaging test used to precisely measure bone mineral density (BMD) and assess bone strength. It is considered the gold-standard method for evaluating bone health and identifying early changes that may increase fracture risk.
Unlike standard X-rays, a DEXA scan uses two low-dose X-ray beams to differentiate between bone, lean tissue, and fat. This allows for highly accurate measurements of bone density.
At HealthScreen, DEXA scans are used as part of a broader preventative health assessment, helping you understand your bone health today and make informed decisions for long-term health and longevity.
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Our Difference
Medical-Grade Imaging
DEXA scanning provides precise, reproducible measurements of bone mineral density, making it the clinical standard for assessing bone strength and fracture risk.
Expert Interpretation
Your results are reviewed in context by experienced clinicians, ensuring you understand what your bone density means for your age, sex, and overall health profile.
Preventative, Personalised Approach
DEXA results are not viewed in isolation. They are integrated with other diagnostics to support proactive, evidence-based health planning.
Why might I need a DEXA Scan?
Here are the potential benefits
Detection of Osteoporosis
Identify changes in bone density before symptoms or fractures occur.
Objective Risk Assessment
Quantify fracture risk using clinically validated bone density measurements.
Informed Lifestyle & Treatment Decisions
Support evidence-based decisions around nutrition, exercise, supplementation, and medical follow-up.
Baseline & Long-Term Monitoring
Track bone density changes over time to assess the impact of lifestyle or therapeutic interventions.
HEALTH DIAGNOSTIC PROGRAMS & LONGEVITY MEMBERSHIPS
At HealthScreen, we use advanced diagnostics to help you take a proactive approach to health — not just to live longer, but to live better.
Why Bone Mineral Density Matters?
Bone mineral density reflects the strength and structural integrity of your bones. Reduced bone density is associated with an increased risk of fractures, loss of mobility, and reduced quality of life as we age.
DEXA vs Body Composition Scans
While both scans provide valuable health insights, they serve different purposes:
DEXA Scans
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Focus on bone mineral density
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Assess bone strength and fracture risk
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Used clinically for osteoporosis and bone health monitoring
Body Composition Scans
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Measure fat mass, lean muscle, and fluid distribution
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Track fitness, metabolic health, and body composition changes
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Do not assess bone strength in a clinically diagnostic way
Many individuals benefit from both assessments, depending on their health goals and risk profile.
Still Have Questions? We’ve Got Answers.
Do I need a DEXA scan?
Not everyone requires a DEXA scan.
As part of our diagnostic program, if you elect to add a DEXA scan, your risk factors and medical history will be reviewed with your treating physician, who will determine whether the scan is clinically appropriate.
Although DEXA uses a very low dose of radiation, it remains a medical imaging test. Our physician-led approach ensures every investigation has a clear clinical purpose and contributes meaningfully to your long-term health.
Are DEXA scans safe?
Yes. DEXA scans are safe, non-invasive, and routinely used in clinical practice to measure bone mineral density. They use a very low dose of radiation, lower than that of a standard chest X-ray.
How is the scan performed?
A DEXA scan is a quick procedure that involves lying on your back on an X-ray table while specific areas of your body are measured.
Do I need to prepare for the scan?
Yes, it’s recommended to:
- Avoid eating or drinking for at least 2 hours before the scan.
- Avoid intense exercise for 12 hours before the scan.
- Wear light clothing and remove metal accessories for accurate results.