Bone Density Testing

A Bone Mineral Density (BMD) test estimates the strength of your bones by measuring the density of certain minerals, like calcium. Bone density testing is a simple, non-invasive procedure that takes just a few minutes.

We all lose bone mass as we age, and our bones become lighter, less dense, and more porous. If your bone density is lower than normal, you can increase your bone strength and reduce your chances of fracture through supplementation, weight-bearing exercise, and medication.

Available Scans and Screenings for Bone Density

Danbury Hospital has several different ways to measure bone density, including:

Dual-energy X-ray absorptiometry (DEXA)

This uses two different x-ray beams to estimate bone density in your spine, hip, or forearm. Strong, dense bones allow less of the x-ray beam to pass through them. This test is fast and uses very low doses of radiation but is more expensive than ultrasound testing.


This test is generally used to look for problems. If results from an ultrasound test find low bone density, DEXA is recommended to confirm the results.

Quantitative computed tomography (QCT)

This scan measures the density of a bone in the spine. QCT is not usually used because it is expensive, uses higher radiation doses, and is less accurate than DEXA.

For More Information

To learn more about bone density screening, or to schedule an appointment, talk to your doctor about Danbury Hospital.

If you need a doctor referral call us at 1-800-511-8287, or search our Find a Doctor tool to find a doctor near you.