(DEXA) Dual-energy x-ray absorptiometry is a technique used to aid in the diagnosis of osteopenia and osteoporosis. DEXA checks signs of bone thinning and mineral loss. It is a helpful aid for evaluating the probability of a fracture and whether or not any preventative treatment is needed. There is no prep for the Bone Density test except to remove any jewelry. You will lie on a cushioned table while the scanner passes over your body.