A bone density test determines if you have osteoporosis — a disorder characterized by bones that are more fragile and more likely to break.

In the past, osteoporosis would be suspected only after you broke a bone. By that time, however, your bones could be quite weak. A bone density test enhances the accuracy of calculating your risk of breaking bones.

A bone density test uses X-rays to measure how many grams of calcium and other bone minerals are packed into a segment of bone. The bones that are most commonly tested are in the spine, hip and sometimes the forearm.

Sept. 07, 2017
  1. Osteoporosis overview. NIH Osteoporosis and Related Bone Diseases National Resource Center. https://www.niams.nih.gov/Health_Info/Bone/Osteoporosis/overview.asp. Accessed July 19, 2017.
  2. Lewiecki EM. Overview of dual-energy X-ray absorptiometry. https://www.uptodate.com/contents/search. Accessed July 19, 2017.
  3. Skeletal scintigraphy (bone scan). RadiologyInfo.org. https://www.radiologyinfo.org/en/info.cfm?pg=bone-scan. Accessed July 20, 2017.
  4. Bone densitometry. RadiologyInfo.org. https://www.radiologyinfo.org/en/info.cfm?pg=dexa. Accessed July 19, 2017.
  5. Bone mass measurement: What the numbers mean. NIH Osteoporosis and Related Bone Diseases National Resource Center. https://www.niams.nih.gov/Health_Info/Bone/Bone_Health/bone_mass_measure.asp. Accessed July 19, 2017.