Dual Energy X-Ray Absorptiometry: Beyond Bone Mineral Density

Abstract

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. The technique relies on transmission measurements made at two photon energies to allow calcium, and thereby bone mineral, be assessed.