Dual-energy X-ray absorptiometry (DXA) is a medical imaging technique used to measure bone mineral density (BMD). It works by passing two different X-ray beams through the body, allowing for the differentiation between bone and soft tissue. This helps in assessing the risk of fractures and diagnosing conditions like osteoporosis. The procedure is quick, non-invasive, and involves minimal radiation exposure. Patients typically lie on a table while a scanning arm moves over them. Results are used by healthcare providers to evaluate bone health and determine appropriate treatment options for maintaining or improving bone density.