DEXA (Dual-Energy X-ray Absorptiometry) is an x-ray exam which is used to measure your bone strength or bone mineral density. Osteoporosis is one of the conditions that can cause loss of bone mass. Bones that are not very dense can become weak and are more likely to break.
Density measurements are taken of bones at specific areas of your body. Usually at the lower back, hip, wrist or forearm. The results show whether you have lost bone density. The measurements also help determine the presence of osteoporosis and can be used to estimate your risk of a possible bone fracture. If you are being treated for bone loss, a follow-up exam can also show if the therapy is working.
There is little or no preparation for this exam. Please do not take any calcium supplements 24 hours prior to the exam. Dress comfortably but try to avoid clothes with metal zips, buttons or belts.