What is the estimated radiation exposure for children during a DXA scan?

• A. 1-2 uSv
• B. 3-4 uSv
• C. 5-6 uSv
• D. 7-8 uSv

Answer: (C)

The estimated radiation exposure for children during a DXA scan is generally in the range of 1 to 10 microsieverts (uSv), making the option of 5-6 uSv a reasonable average assessment within the context of this range.

DXA scans use very low doses of ionizing radiation to measure bone density, making them a safe imaging modality for children and adults alike. The amount of radiation exposure is considerably lower compared to other imaging techniques, such as X-rays or CT scans, which is why DXA is particularly favored for evaluating bone health.

While the actual exposure can vary depending on the specifics of the DXA system used, the calibration settings, and the age and size of the child, 5-6 uSv reflects common estimates based on available clinical data and studies. This understanding provides reassurance regarding the safety of DXA scans for assessing conditions like osteoporosis or assessing fracture risk in children.