Imaging technique measuring bone mineral density
Expansion
Dual-Energy X-Ray Absorptiometry
Purpose
Gold standard for osteoporosis screening and diagnosis
Clinical Context
DXA (also called DEXA) uses two X-ray energies to measure bone density. Rapid, low radiation, reproducible.
Related Terms
- DEXA:
- QCT:
- Quantitative ultrasound:
Key Points
- DXA T-score: ≥-1.0 normal, -1.0 to -2.5 osteopenia, ≤-2.5 osteoporosis