Bone densitometry, also called dual-energy x-ray absorptiometry, DEXA or DXA, 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 individuals risk for developing osteoporotic fractures. DXA is simple, quick and noninvasive. Its also the most commonly used and the most standard method for diagnosing osteoporosis.