Densitometry (DXA)

Concord Orthopaedics offers on-site densitometry (DXA), allowing our patients the option of convenient scheduling, often on the same day of your appointment with one of our rheumatologists.

DXA (Dual-energy X-ray Absorptiometry, previously DEXA) is a diagnostic test used to measure bone density. It is a "tool" used by your physician to diagnose osteoporosis, to follow medication usage than can cause osteoporosis, and to monitor your response to osteoporosis treatment.

A DXA exam takes 10-15 minutes and is performed with the patient fully clothed and reclined on a padded table. A machine passes over the patient exposing them to less radiation than1/20th of that used in a routine chest x-ray.

DXA machines feature special software that computes and displays the bone density results on a computer monitor. Test results provide the absolute bone density as well as two scores: t-score and z-score. The t-score shows the amount of bone a patient has compared to a group of young healthy adults. The z-score reflects the amount of bone a patient has compared to individuals of the same gender and age. Results of the t-score determine if the patient has normal bone density, osteopenia (low bone density) or osteoporosis. A t-score above -1 is normal. A t-score between -1 and -2.5 is osteopenia. A score below -2.5 is osteoporosis.

DXA scans allow for the detection of osteoporosis before a fracture occurs. DXA determines risk for fracture in the future. The rate of bone loss and response to osteoporosis treatments can also be determined with serial scans typically done every 1-2years. Medicare reimburses for DXA every two years.

For more information on Osteoporosis, click here.