What should you know about DEXA scan radiation dose?

The scanner sends X-rays through selected bones, commonly the hip and lower spine, and measures how much is absorbed. The dose is much lower than that used for many diagnostic X-ray examinations. The machine does not leave radiation in your body, and the scan does not make you radioactive. A radiographer positions you and keeps the scan focused on the areas needed for the measurement.

Radiation decisions still depend on your circumstances. Tell the imaging service if you are pregnant, might be pregnant, or have recently had another examination involving contrast or radiation. A referral team can decide whether the timing or test should change. Premature Ovarian Insufficiency can be one reason bone health is assessed, but the scan itself does not diagnose every cause of low bone density.

Follow the imaging centre’s instructions and wear clothing without bulky metal fasteners when possible. Remove metal objects from the area being scanned. You normally lie still while the arm of the DEXA scanner passes over you; the test does not require an injection. Tell the team if pain, limited movement, or difficulty lying flat could affect positioning. Keep a list of medicines and previous fracture information available for the clinician interpreting the result.

Contact the imaging service before the appointment if pregnancy is possible, you cannot remain still, or you have questions about a recent radiation examination. After a DEXA scan, seek medical advice for a new or worsening symptom that is unrelated to the routine positioning, such as severe pain, weakness, or trouble breathing. These symptoms are not expected effects of the radiation dose and need separate assessment.

Ask which bones will be measured, why the scan has been recommended, and how the result will affect your care. You can also ask whether another test is needed, when the report will be reviewed, and how your personal medical history changes the interpretation.