DEXA scans

What is a DEXA scan?

A Dual-Energy X-ray Absorptiometry (DEXA) scan is a medical imaging technique that measures bone mineral density (BMD). It is commonly used to assess bone health and the risk of fractures. It usually measures bone density in the spine and hips. The rate of bone density reduction increases after menopause so it can be an important tool in managing womens’ postmenopausal health.

What’s involved in a DEXA scan:Everything you can expect

1. Preparation

Usually, no special preparation is required.

2. Attire

You may be asked to wear comfortable clothing without any metal, as metal objects can interfere with the scan. Some hospitals may ask you to change into a hospital gown.

3. Positioning

You will lie on your back on a couch, and a scanner arm will pass over your body taking images of your hips and spine. You do not need to go through a tunnel or have an injection. The amount of radiation used is very low – much less than a standard X-ray.

4. Duration

The procedure is quick, typically taking about 10 to 20 minutes.

If you have more questions about DEXA scans, please feel free to contact us

DEXA scan results are usually reported as a T-score and a Z-score:

• T-score: This score compares your bone density with that of a young, healthy adult of the same sex. A T-score above -1 is considered normal, between -1 and -2.5 indicates low bone mass (osteopenia), and -2.5 or lower is indicative of osteoporosis.
• Z-score: This score compares your bone density with that of people of your age, sex, and size. A Z-score below -2.0 may suggest that something other than ageing is causing abnormal bone density.

Why are DEXA scans used?Find out why your doctor might recommend a DEXA scan

Diagnosing osteopenia and osteoporosis

DEXA scans are commonly used to diagnose osteoporosis and assess fracture risk.

Monitoring treatment

If someone is undergoing treatment for osteoporosis, periodic DEXA scans can monitor changes in bone density.

It’s important to discuss the results of your DEXA scan with your doctor, who can provide context based on your overall health and medical history. They can recommend appropriate steps if needed, such as lifestyle changes or medication to improve bone health.