Bone Mineral Density Test Explained

The usual method is a DEXA scan, which uses a small amount of X-ray energy. It commonly assesses the hip and spine and can provide a baseline for later comparison when repeat testing is appropriate.

The report contains scores that compare your measurement with reference populations. Which score matters most depends on factors such as age and the clinical reason for testing, so the number should be interpreted by a qualified clinician rather than read in isolation.

Bone density contributes to fracture risk, but it is not the whole picture. Previous low-trauma fractures, family history, balance, smoking, long-term medicines, and certain health conditions can alter the overall assessment and the next step.

Check the appointment instructions before changing supplements or medicines. Let the facility know about possible pregnancy, recent imaging that used contrast material, metal implants near the measurement site, or difficulty lying flat.

Bring relevant scan reports if they were completed elsewhere. At follow-up, review the actual result with your clinician and discuss exercise, nutrition, fall prevention, medicine review, or treatment according to your personal assessment. Comparison scans are easiest to interpret when technique and measured sites are consistent.

Bone loss often causes no symptoms before a fracture. Obtain prompt care for sudden severe back pain, pain after a fall, inability to use a limb normally, visible deformity, or new numbness or weakness.

Book a non-urgent review if you have lost height, developed a stooped posture, had a fracture from minor trauma, or use a medicine known to affect bone. These details may matter even if an earlier density result was reassuring.

Clarify why testing is recommended now, which skeletal sites will be assessed, what your score adds to your wider fracture evaluation, and whether another cause of low density should be investigated. Ask what changes would trigger treatment or a future scan.