Bone mineral density scan (DEXA)
A low-dose X-ray scan measuring bone density at the hip and spine, used to assess fracture risk and detect osteopenia or osteoporosis before a fracture occurs.
What it is & how it works
Dual-Energy X-ray Absorptiometry (DEXA) measures bone mineral density, most commonly at the hip and lumbar spine, using two low-dose X-ray beams of differing energy; results are reported as a T-score (compared to a healthy young-adult reference) and Z-score (compared to age-matched peers), the standard basis for classifying normal bone density, osteopenia, or osteoporosis.
How it's done
A low-dose X-ray scan lasting roughly 10–20 minutes, requiring no special preparation beyond removing metal objects, performed by a radiology technician while lying on a table and reviewed by a physician against standard T-score/Z-score thresholds and, where available, prior scans to track change over time.
Why Unfold Longevity
Used as a standard, objective baseline for fracture-risk assessment rather than inferred from age or symptoms alone, and reviewed against established T-score thresholds as part of an individualized longevity assessment.
The clinical reference standard for bone density measurement, with well-established T-score/Z-score thresholds; low radiation dose, standard clinical methodology.
Related questions
It's commonly recommended for postmenopausal women, men over 50 with risk factors, and anyone with a prior fragility fracture or condition affecting bone health, with rescreening intervals (commonly every 1–2 years) individualized based on baseline results and risk factors rather than a fixed schedule for everyone.
A T-score compares your bone density to that of a healthy young adult and is the standard basis for classifying normal density, osteopenia, or osteoporosis; a Z-score compares you to others of your own age and sex and is used mainly to flag bone loss that's unusual for your age group, which may prompt investigation for an underlying cause.
Every treatment starts with a proper assessment
Not treatment sold on the first call. A clinician reviews your case before anything is recommended.