Dual Energy X-ray Absorptiometry (DXA) for Osteoporosis. This DXA display printout shows the results of a typical normal study. DXA scans are used to quantify bone mass that is expressed in standard deviations from the normal. This information can be applied to management, prognosis, and estimation of fracture risk in patients with osteopenia or osteoporosis. DXA is the most common study used as a screening test in women over age 65 and others at risk for osteoporosis. (Reprinted with permission from Taylor JAM, et al, Skeletal Imaging, Atlas of the Spine and Extremities. 2010, 2nd edition. St. Louis, Elsevier.).