A DXA scan is the gold standard for measuring bone density and diagnosing osteoporosis. This guide covers what's covered by provincial health plans, private clinic options, what the test involves, and how to interpret your results — in plain language.
DXA stands for Dual-energy X-ray Absorptiometry. It's a specialized X-ray that measures the density of your bones — specifically how much mineral is packed into a given area of bone. The denser your bones, the more mineral they contain, and the stronger and more fracture-resistant they are.
DXA is the only imaging test that provides the standardized measurements (T-scores and Z-scores) used to diagnose osteoporosis according to WHO criteria. Other tests — including heel ultrasound devices sometimes found in pharmacies, CT-based bone assessments, or MRI — are not equivalent and cannot be used for clinical diagnosis or treatment decisions under Canadian guidelines.
The radiation dose from a DXA scan is minimal — roughly 0.001–0.003 mSv, compared to 0.1 mSv for a chest X-ray and 6 mSv for a CT scan of the chest. It's considered safe for repeated monitoring scans over years.
The scan itself is simple and takes 15–25 minutes in total. Here's what to expect:
DXA coverage varies by province. Here's the current landscape as of 2026:
| Province | Coverage Criteria | Typical Wait Time |
|---|---|---|
| Ontario | Women 65+; men 65+ with risk factors; any age after fragility fracture; glucocorticoid users | 4–12 weeks (urban); longer in rural areas |
| British Columbia | Women and men 65+; younger with clinical risk factors | 2–8 weeks |
| Alberta | Women 50+ with risk factors; men 60+; all women 65+ | 3–10 weeks |
| Quebec | Women 65+; men 70+; younger with major risk factors | 4–16 weeks |
| Manitoba | Women 65+; clinical risk factors | 4–8 weeks |
| Saskatchewan | Women 65+; risk-based for younger patients | 3–6 weeks |
| Nova Scotia | Women 65+; risk-based eligibility | 6–14 weeks |
| New Brunswick / PEI / NFLD | Similar to national guidelines; check provincial health plans | Variable; can be longer in rural areas |
Note: Coverage criteria change. Always verify current eligibility with your provincial health authority or family doctor.
If you don't qualify for a publicly funded DXA scan, or if you want faster access, private bone density testing is available across Canada. Costs vary by clinic and location:
| Province / City | Typical Private DXA Cost | Notes |
|---|---|---|
| Ontario (Toronto, Ottawa) | $80–$150 | Many radiology clinics; some include physician interpretation fee |
| British Columbia (Vancouver) | $100–$160 | Available at private diagnostic imaging centres |
| Alberta (Calgary, Edmonton) | $90–$140 | Good private clinic availability in major cities |
| Quebec (Montreal) | $100–$180 | Some bilingual clinics available |
| Smaller cities / rural areas | $120–$200+ | May require travel to nearest equipped facility |
Many private health insurance plans (employer benefit packages, Blue Cross, Manulife, Sun Life) cover DXA scans as diagnostic imaging. Check your plan details before paying out of pocket.
The T-score compares your bone mineral density to that of a healthy young adult at peak bone mass (typically around age 25–35). The World Health Organization (WHO) classification, used throughout Canada:
| T-Score | WHO Classification | Meaning |
|---|---|---|
| -1.0 or above | Normal | Bone density in the normal range |
| -1.0 to -2.49 | Osteopenia (low bone mass) | Below normal; increased but not yet diagnostic risk |
| -2.5 or below | Osteoporosis | Significantly reduced; diagnosis of osteoporosis |
The diagnosis is based on the lowest T-score across the measured sites (spine, hip, forearm). A score of -2.5 at the femoral neck alone is sufficient for an osteoporosis diagnosis, even if other sites are higher.
The Z-score compares your bone density to others of your same age and sex. It's primarily relevant for premenopausal women, men under 50, and younger adults. A Z-score at or below -2.0 is considered "below the expected range for age" and should prompt investigation for secondary causes of bone loss.
Your report also shows the actual bone mineral density value in grams per square centimetre (g/cm²). This absolute value is most useful for tracking change over time on serial DXA scans. A change of 3–5% or more from one scan to the next (after accounting for measurement error) is considered clinically significant.
DXA results can be misleading in some circumstances. It's important to know when results may be inaccurate:
TBS is an additional analysis that can be extracted from existing DXA images at the spine. It estimates bone microarchitecture — not just density, but the quality and organization of the bone structure. TBS can identify fracture risk even in patients with normal or mildly reduced T-scores. It's increasingly available at larger Canadian imaging centres and adds clinical value in specific situations.
VFA is a low-dose lateral spine imaging technique that can be performed on the same DXA machine during your regular scan. It identifies prevalent vertebral fractures that you may not know you have — many vertebral fractures cause no acute symptoms. The presence of a vertebral fracture dramatically increases future fracture risk and moves patients into the high-risk treatment category regardless of their T-score.
After receiving your DXA results, your doctor will typically:
See our guides on understanding your osteoporosis diagnosis, osteoporosis medications in Canada, and exercise for bone density for next steps.