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Bone Density
What is a bone density exam?
A bone density exam, also known as a bone densitometry or DEXA scan, is a quick and painless test that measures the density and strength of your bones. The test uses low-dose X-rays to determine the amount of calcium and other minerals in the bones, which indicates bone strength. Bone density exams are most commonly used to diagnose and monitor osteoporosis, a condition that causes bones to become weak and brittle. They can also help assess your risk for fractures and track the effectiveness of treatments for bone loss.
Book an AppointmentWhat to expect during a Bone Density Scan?
A bone density scan (DEXA) is quick, painless, and non-invasive. Here's what typically happens during the procedure:
- You will lie comfortably on a table while the technician positions you so that the area being examined is correctly aligned (usually the hip, spine, or forearm).
- The scanner’s detector will pass over the targeted area, using a very low dose of X-rays to measure bone density.
- You may be asked to stay still and briefly hold your breath while the machine takes measurements.
- The procedure usually takes 10–20 minutes, after which you can resume normal activities immediately.
- A radiologist or your doctor will review the results to determine if your bone density is normal or shows signs of osteoporosis, and they may recommend further testing or treatment if needed.
Tip: Avoid wearing jewelry or clothing with metal zippers, buttons, or snaps on the day of the exam to ensure accurate results.
How to prepare for a bone density exam?
Follow these steps to ensure your bone density test goes smoothly and produces accurate results:
Wear comfortable clothing
Choose loose-fitting clothes without zippers, buttons, or snaps made of metal. You may need to undress to the waist for scans of the hip or spine.
Inform your doctor about medications
Let your doctor know if you are taking calcium supplements, hormone therapy, or other medications that may affect your results.
Share your medical history
Tell your doctor about conditions such as kidney disease, sarcoidosis, or any other health issues that could impact bone health.
Avoid calcium supplements
Do not take calcium or vitamin D supplements for at least 24 hours before the test to prevent interference with results.
Plan your timing
For women, it is best to schedule the scan during the first week after your menstrual period, when hormone levels are more stable.
Following these guidelines and consulting with your doctor will help ensure your bone density exam is accurate and provides useful information about your bone health.
Frequently Asked Questions
Bone mineral density—usually at the hip and spine—to assess osteoporosis and fracture risk.
Yes. It uses a very low dose of X-rays.
About 10–20 minutes. You can return to normal activities immediately.
Wear clothing without metal and avoid calcium or vitamin D supplements for 24 hours beforehand. Tell us if you recently had a barium/contrast study or if you’re pregnant.
Adults at risk for osteoporosis (e.g., postmenopausal women, adults with prior fractures, long-term steroid use, very low body weight, or strong family history). Ask your provider about your timing.