What should you know about DEXA scan accuracy?

A trained technologist positions you and selects the correct region of interest. Movement, metal over the measured area, spinal arthritis, a previous fracture, or a replacement joint can make a reading harder to interpret. Results from different machines or body sites are not always directly interchangeable. The report is therefore read with your age, sex, fracture history, medicines, hormonal health, and conditions that affect bone turnover. A single score describes bone density; it does not by itself predict whether you will break a bone.

Tell the centre about prior fractures, hip or spine surgery, metal implants, recent contrast imaging, and medicines or supplements. Keep still and follow positioning instructions. If you have an earlier DEXA report, bring it or ask whether the same facility can access it. Follow-up scans are most meaningful when the same body sites, machine, and reporting approach are used where practical. Ask the clinician to explain whether the result changes your care or simply needs observation.

Arrange medical assessment for a new fracture, persistent back pain after a small strain, or noticeable loss of height rather than waiting for a routine scan result. Seek urgent help after a serious fall, or for sudden severe back pain with leg weakness, numbness, or bladder or bowel changes. The scan does not explain every cause of pain, so symptoms may need separate evaluation.

Ask whether the scan quality was acceptable, which sites were included, whether your result can be compared with an earlier test, and what next step fits your fracture history.