Bone density scans, also known as DEXA scans, help to work out your risk of breaking a bone.
They're often used to help diagnose bone-related health problems, such as osteoporosis, or to assess the risk of getting them.
Total body bone density scans can also be used to measure the amount of bone, fat and muscle in the body.
This type of scan is routinely used in children, but is only used as part of a research study in adults.