What should you know about radiation in dexa scan?

A DEXA scanner sends two X-ray energies through selected bones, commonly the hip and spine, while you lie still. A computer compares how much energy passes through bone and soft tissue to estimate bone mineral density. The test does not make you radioactive. It is different from a treatment that uses radiation to alter tissue. Results help a clinician assess bone strength and fracture risk alongside your age, health history and medicines. A scan may be considered in situations such as [Premature Ovarian Insufficiency](/conditions/premature-ovarian-insufficiency/).

Tell the imaging team if you are pregnant or might be pregnant, and mention recent contrast examinations or procedures if asked. Wear clothing without metal when possible and follow local instructions about supplements or meals. During the scan, keep still and follow positioning guidance; the appointment is generally straightforward and does not require an injection. Learn more about the [DEXA Scanner](/technology/dexa-scanner/) and [Bone Density Scan](/treatments/diagnostics-and-screening/bone-density-scan/).

A DEXA scan itself is not an emergency procedure. Ask the ordering clinician to clarify an unexpected result, especially after a fracture, height loss or persistent back pain. Seek urgent care for sudden severe back or hip pain after a fall, inability to bear weight, or new weakness or numbness. The scan result should be interpreted with your clinical history rather than in isolation.

Why has a DEXA scan been recommended? Which bones will be measured? Do I need to change any medicines or supplements? When will the result be reviewed, and what would it mean for my care?