What is the typical radiation exposure rate for Dual-energy X-ray Absorptiometry (DXA)?

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Multiple Choice

What is the typical radiation exposure rate for Dual-energy X-ray Absorptiometry (DXA)?

Explanation:
DXA uses very low radiation because it only needs enough energy to distinguish bone from soft tissue while quickly scanning the body. The typical effective dose per scan is on the order of a few microSieverts, usually around 1–3 μSv and can reach up to about 5 μSv in some cases. This is why the best answer is that DXA exposure is less than 5 μSv. For perspective, a chest X-ray is about 100 μSv and annual natural background radiation is on the order of a few mSv, so the DXA dose is dramatically lower.

DXA uses very low radiation because it only needs enough energy to distinguish bone from soft tissue while quickly scanning the body. The typical effective dose per scan is on the order of a few microSieverts, usually around 1–3 μSv and can reach up to about 5 μSv in some cases. This is why the best answer is that DXA exposure is less than 5 μSv. For perspective, a chest X-ray is about 100 μSv and annual natural background radiation is on the order of a few mSv, so the DXA dose is dramatically lower.

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