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Bone density scanning, also called dual-energy x-ray absorptiometry (DXA) or bone densitometry, is an enhanced form of x-ray technology that is used to measure bone loss and helps in the diagnosis of osteoporosis. DXA is today's established standard by the World Health Organization (WHO) for measuring bone mineral density (BMD). DXA is most often performed on the lower spine and hips but can include images of the forearm and/or whole body in some cases.​​​