A DEXA scan, or Dual-Energy X-ray Absorptiometry scan, is a medical imaging test used to measure bone mineral density (BMD). It is commonly used to diagnose osteoporosis, assess fracture risk, and monitor changes in bone density over time. The scan involves lying on a table while a low-dose X-ray machine passes over the body, typically focusing on the hip and spine. The procedure is quick, non-invasive, and painless, taking about 10-20 minutes. Results are compared to average BMD values to determine bone health. DEXA scans are crucial for early detection and management of bone-related conditions.