What is a bone density test and how is it done?
A bone density test is also called a DEXA scan. It uses x-rays to check your bones for calcium and other minerals to determine your risk of osteoporosis and fracture.DEXADual-energy x-ray absorptiometry (DEXA) is the most common method of measuring bone mineral density. It’s easy to perform and does not use much radiation.Areas MeasuredA DEXA scan is typically done on the hip and spine. Measuring bone density at these sites can predict the risk of fracture in other areas.During the ScanYou lie on a padded table for about 10 minutes while an imager passes over your body. The scanner produces two x-ray beams of different energy levels that measure the target sites.Bone Density CalculationThe thickness of the bone determines the amount of the x-rays that pass through for each type of beam.
