A DXA scan (Dual-Energy X-ray Absorptiometry) is a low radiation imaging test to evaluate bone mineral density (BMD). Tips: Should be done at the same facility each time. Otherwise, it is hard to evaluate for clinical change in the BMD. Least significant change (LSC) The smallest difference in BMD that is considered clinically significant. This is listed on the DXA report, and will be different at different facilities. A good rule of thumb is 5% change in the BMD. Always lo