Bone densitometry, also called dual-energy x-ray absorptiometry, or DEXA, uses a very small dose of ionizing radiation to produce pictures of the inside of the body (usually the lower (or lumbar) spine and hips) to measure bone loss. It is commonly used to diagnose osteoporosis, to assess an individual’s risk for developing osteoporotic fractures. DEXA is simple, quick and noninvasive.
Body composition measurement with dual-energy X-ray absorptiometry (DEXA) can look beyond weight and the traditional body mass index (BMI) to determine body fat distribution – an important risk factor in a variety of diseases. Body composition scans with DEXA provide precise and accurate data on bone and tissue composition, including bone mineral density (BMD), lean tissue mass, and fat tissue mass. They provide both total body data and regional results (trunk, arms, legs, pelvis and android/gynoid regions). The measurements are fast and non-invasive.