What is a bone density scan?

A bone density scan, often called a DEXA or DXA scan (Dual-Energy X-ray Absorptiometry), is a safe, simple, and non-invasive test used to assess the strength and density of your bones. It plays a vital role in detecting conditions like osteoporosis, even before symptoms or fractures occur.

Using a very low dose of X-ray radiation, the scan takes detailed images, typically of areas most vulnerable to bone loss, such as the lower spine and hips. These images help measure the amount of calcium and other essential minerals in your bones.

This test is crucial for people at risk of developing bone-related conditions. It allows doctors to:

• Diagnose osteoporosis early, before a bone break
• Evaluate your risk of fractures in the future
• Monitor the effectiveness of treatments if you're already undergoing therapy for bone loss

Despite sounding technical, the DEXA scan is quick, painless, and usually completed within 10–30 minutes. It's currently considered the gold standard in bone health assessment.

Procedure Details

Before the procedure

Preparing for a bone density (DEXA) scan is simple and requires little effort. On the day of your exam, you can eat and drink as you normally would; there's no need to fast. However, it's essential to avoid taking calcium supplements for at least 24 hours before your scan, as they can interfere with the accuracy of the results.

Regarding what to wear, loose and comfortable clothing is best. Avoid clothes with metal zippers, belts, or buttons, as metal can interfere with the scan. You might be asked to change into a hospital gown depending on the scanned area. You'll also need to remove any jewellery, eyeglasses, dental appliances, or other metal items that could be in the way during the test.

If you've recently had any other imaging tests, especially a barium study or a CT scan with contrast, make sure to inform your doctor or the technician. These procedures can sometimes affect the bone density readings and may require rescheduling your DEXA scan for the most accurate results.

Also, if there's any possibility that you might be pregnant, it's crucial to inform your doctor and the technician before the scan. While the radiation exposure in a bone density test is very low, extra precautions are taken during pregnancy to ensure the baby's safety. In some cases, your doctor may choose to postpone the scan or use alternative methods.

By following these simple guidelines, you can help ensure that the scan goes smoothly and delivers accurate insights into your bone health. Please reach out if you have any questions or concerns before your appointment; we're here to help.

During the procedure

During a bone density test, also known as a DEXA scan, you'll lie comfortably on a padded table while a scanning arm passes slowly over your body. The test usually focuses on key areas where bone loss is most likely to occur, typically the lower spine, hips, or sometimes the forearm. These areas are scanned using a low-dose X-ray to measure the amount of calcium and minerals in your bones.

You'll need to remain still during the scan, but don't worry, it's completely painless and non-invasive. The machine doesn't enclose your body like an MRI, so it's a comfortable experience for most people. The entire test usually takes 10 to 30 minutes, depending on which parts of your body are being assessed.

You may be asked to wear a hospital gown, especially if your clothes contain any metal that could interfere with the scan. There's no need for injections, dyes, or any preparation beyond what's already been discussed. Once the scan is complete, you can immediately return to your routine.

The results from your scan help your doctor determine if you have osteoporosis or low bone mass, and whether you're at risk for fractures. It also serves as a valuable tool for monitoring how well treatments for bone loss are working, if you're already receiving care.

At Apex Hospitals, we are committed to helping you stay active, independent, and healthy. With our advanced DEXA scanning technology and expert care team, you can trust us to support you in every step of your bone health journey. Because strong bones mean a stronger you.