What is DXA?
Dual-energy X-ray Absorptiometry (DXA) — also known as DEXA or a bone density test — is the gold standard for measuring Bone Mineral Density (BMD). This safe, painless, and non-invasive scan helps identify the strength of your bones and plays a crucial role in the early diagnosis and monitoring of osteoporosis.
How It Works
DXA uses two low-dose X-ray beams to distinguish between bone and soft tissue. The scan produces precise measurements of bone density, allowing healthcare providers to assess your risk of fracture and monitor changes in bone mass over time.
Why It’s Important?
At Blackrock DXA, your bone health is our priority. We’re dedicated to providing accurate, safe, and reliable DXA scanning, with patient-focused care every step of the way.
Understanding Your Bone Health
Bone health often declines gradually — and silently — over time. You may not notice symptoms until a fracture occurs. That’s why early detection matters.
DXA scans provide clarity, helping you and your healthcare provider make informed decisions before problems become serious. With just one scan, you can learn more about your risk and take steps to protect your future wellbeing.
Risk Factors That May Lead to Osteoporosis
Personal Factors
- Age: Women over 65 and men over 70
- Low body weight or frailty
- Rapid weight loss
- Poor diet low in calcium and vitamin D
- Smoking or high alcohol intake
- Early menopause (women)
- Low testosterone (men)
- Previous fractures from minor falls
- History of cancer, rheumatoid arthritis, thyroid/parathyroid disorders, inflammatory bowel disease, or long-term steroid use
Medications Linked to Bone Loss
- Steroids
- Anti-epileptic drugs
- Chemotherapy
- Proton pump inhibitors (PPIs) like omeprazole
- Blood thinners (e.g. warfarin, heparin)
Family History
- Osteoporosis in a parent or sibling
- History of hip fracture
- A relative with a spinal curvature or “hump”
What About Radiation?
DXA scans use very low levels of ionising radiation — lower than a standard chest X-ray and roughly equal to a few days of natural background radiation or a transatlantic flight.
Despite the low exposure, all radiation is regulated by the Environmental Protection Agency (EPA), and a referral from a GP or consultant is legally required to ensure the scan is medically justified.
Important Notes:
- Scans cannot be booked until your referral is received.
- Women who are or might be pregnant, or who are breast-feeding, should not have a DXA scan.
- All women will be asked for the date of their last menstrual period, for accurate clinical
interpretation of the scan.
What Happens After the Scan?
The scan is interpreted by a doctor and reported to your referring clinician within 5–7 working days. Your results will appear as either:
Z-score: Used in children, young adults, women before menopause is completed, and in men younger than 50. It compares your BMD to people of your own age and sex.
