Dual-energy X-ray absorptiometry (DEXA) is a means of measuring bone mineral density using spectral imaging. Two X-ray beams, with different energy levels, are aimed at the patient’s bones. When soft tissue absorption is subtracted out, the bone mineral density can be determined from the absorption of each beam by bone. DEXA is the most commonly used and the most standard method for diagnosing osteoporosis, to assess an individual’s risk for developing osteoporotic fractures.

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