09-09-2017, 01:14 PM
Dual energy X-ray absorptiometry (DXA, previously DEXA) is a way to measure bone mineral density (BMD). Two x-rays, with different levels of energy, are directed at the patient's bones. When soft tissue absorption is subtracted, BMD can be determined from the absorption of each beam per bone. Dual-energy X-ray absorptiometry is the most widely used and most studied bone density measurement technology.
DXA scanning is typically used to diagnose and track osteoporosis, in contrast to the exploration of nuclear bone, which is sensitive to certain metabolic diseases of the bones in which the bones are trying to heal from infections, fractures or tumors. evaluate bone mineral density. DXA scans can also be used to measure total body composition and fat content with a high degree of accuracy comparable to hydrostatic weighing with some important caveats. However, it has been suggested that by accurately measuring minerals and lean soft tissue (LST), DXA can provide biased results because of its method of indirectly calculating fat mass by subtracting it from LST and / or body cell mass (BCM) that DXA really measures. DXA scanners are also used to assess adiposity in children, especially to conduct clinical research.
DXA scanning is typically used to diagnose and track osteoporosis, in contrast to the exploration of nuclear bone, which is sensitive to certain metabolic diseases of the bones in which the bones are trying to heal from infections, fractures or tumors. evaluate bone mineral density. DXA scans can also be used to measure total body composition and fat content with a high degree of accuracy comparable to hydrostatic weighing with some important caveats. However, it has been suggested that by accurately measuring minerals and lean soft tissue (LST), DXA can provide biased results because of its method of indirectly calculating fat mass by subtracting it from LST and / or body cell mass (BCM) that DXA really measures. DXA scanners are also used to assess adiposity in children, especially to conduct clinical research.