What is a bone density study?

A bone density study measures the calcium content of your bones. A scanner that emits very low dose X-ray beams is used for the test. You are exposed to very little radiation, even less than with traditional X-rays. Scans of the low back, hip or forearm are most common. A bone density study is the best way to check for osteoporosis (loss of bone mass). If you are taking medication to prevent or treat osteoporosis, scan results also can show whether the treatment is working.

Having a bone density scan is simple and painless. It takes just 15 to 30 minutes. On the day of your test, arrive 15 minutes early. You’ll need time to check in and fill out an information sheet. Before the scan, you will be asked to remove belts and any items in your pockets. For a central body scan, you may be asked to wear a gown.

For success of the scan and for your safety, tell the technologist if you:

You will be asked about your overall health or any medications you take.

You will be asked to lie on a table on your back. For part of the test, your lower legs will be raised on a sponge to help ensure that the images taken will be clear. A scanner arm will move back and forth over the part of your body being scanned. During the scan, the technologist will stand or sit nearby. You will be asked to remain still while the images are taken.

Follow instructions to help prevent the need for a second test.

Remain still while images are taken.

When the scan is done, you can return to your normal routine. The results will go to the ordering provider who will likely discuss your bone density scores with you at a later date.