DEXA Scans

The most exact way to measure bone density is by a DEXA-scan (dual-energy x-ray absorptiometry). This is done on the whole body.

The DEXA-scan can show whether you are at risk for a fracture. If you have already broken bone and your doctor thinks you might have osteoporosis, the test can confirm the diagnosis. The test results are reported as a number. If your doctor says your result was -2.5 SD (standard deviation) or more, this means you have osteoporosis. A test finding of -1SD to -2.5SD means you have some bone loss.

This test is done by aiming a low dose x-ray at the most vulnerable areas for bone loss. The amount of bone loss is calculated from the amount of energy that travels through the bone and is picked up by the detector. The test takes about 10 minutes and is done with the patient fully clothed.