Dual energy x ray absorptiometry for bone mineral density and body composition assessment iaea human health series no 15 2011 118 pp international atomic energy agency vienna austria this publication provides information on the theoretical background as well as the practical application of dual energy x ray absorptiometry to measure bone . International atomic energy agency dual energy x ray absorptiometry for bone mineral density and body composition assessment iaea human health series no 15 iaea vienna 2011. Dual energy x ray absorptiometry dxa or formerly dexa is a technique used to measure bone mineral density bmd the preferred regions for bmd measurement are lumbar spine proximal femur and whole body. Dual energy x ray absorptiometry dxa previously dexa is a means of measuring bone mineral density bmd two x ray beams with different energy levels are aimed at the patients bones when soft tissue absorption is subtracted out the bone mineral density bmd can be determined from the absorption of each beam by bone
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