What is Dual Energy X-Ray Absorptiometry?
Dual energy x-ray absorptiometry is a diagnostic imaging test that is performed to look for signs of bone loss. Doctors usually order the test when patients have symptoms of osteopenia or osteoporosis. Imaging results are interpreted by radiologists to determine highly accurate bone density calculations. Dual energy x-ray absorptiometry is normally performed by a trained radiology technician in a hospital or outpatient clinic, and it can usually be completed in less than half an hour. The large machine used to conduct dual energy x-ray absorptiometry works by emitting two beams of x-ray radiation. One beam is considered high energy, meaning that it can easily penetrate hard, healthy bone tissue. The other beam is lower energy, and it can only make it through soft tissue such as cartilage and weakened bone. In order to calculate bone density, a radiologist subtracts the total reading of the low energy beam from that of the high energy beam. The resulting number can then be compared to n
