dual-energy X-ray absorptiometry scan

A dual-energy X-ray absorptiometry (DXA) scan is a medical test used to measure bone mineral density. It works by comparing how well X-rays of two different energies are absorbed by the body, particularly bone. This allows healthcare professionals to determine the mineral content of bones, which is crucial for assessing the risk of fractures.12

DXA scans are commonly used to screen for osteoporosis, a condition where bones become thin and weak. The results are often expressed as T-scores and Z-scores, which compare a patient's bone density to that of a healthy young adult or someone of similar age, respectively. These tests are typically performed on the wrists, spine, and hips.1