radiograph imaging procedure Dual-energy X-ray absorptiometry procedure 2025-06-01T10:12:02Z Dual-Energy X-Ray Absorptiometry (DEXA) is performed using a C-arm with the x-ray source below the supine patient emitting photons at 2 distinct energy levels specific for soft tissue and cortical bone. A collimator is situated between the patient and the x-ray source to minimize scatter. The attenuations from these low- and high-energy photon emissions are detected above the patient and are combined to create a planar image to assess bone mass per unit of area (g/square cm) to determine bone mineral density (BMD). DEXA may be indicated as a tool to measure regional and whole-body fat and lean mass, such as in patients with malabsorption, cancer, or eating disorders. DEXA