Bone density scanning, also known as dual-energy X-ray absorptiometry (DEXA) or bone densitometry, is a safe, low-dose X-ray technique used to produce images of the bones. It is most commonly performed on the lumbar spine and hips, and sometimes also includes the distal forearm.
Our bone density tests provide valuable insight into bone strength, enabling the early detection and prevention of osteoporosis and related conditions.
At a glance
- Low-dose X-ray technique
- Lower back and hips (sometimes forearm)
- Takes up to 30 minutes
- Report emailed to your doctor the same day
What is osteoporosis?
Osteoporosis is a disorder in which the density and quality of the bones are decreased. A reduction in bone mass and strength makes the bones brittle and fragile, so they fracture easily, especially the spine, hips and forearms.
It is called the 'silent disease' because it does not produce symptoms until a fracture occurs after a minor accident or fall. Worldwide, osteoporosis affects 1 in 3 women and 1 in 5 men over the age of 50. People with risk factors are more likely to develop it.
Why might a bone density test be recommended?
- Advancing age
- Female gender
- White or Asian ethnicity
- Family history of osteoporosis
- Low calcium or vitamin D intake
- Smoking and/or excessive alcohol use
- Low body mass index
- High caffeine intake
- Sedentary lifestyle
- Amenorrhoea
- Hyperparathyroidism
- Hypercortisolism
- Hyperthyroidism
- Hypogonadism
- Corticosteroid use
- Anticonvulsant use
- Thyroxine use
- Heparin use
- Malabsorption syndromes
- Anorexia nervosa
Before the exam
- Eat normally on the day of your exam.
- Avoid taking calcium supplements on the day of the exam.
- Wear comfortable clothing without zips, belts or buttons. You will be given a clean gown to change into before your scan.
- Remove all metal objects from your pockets.
During the exam
You will lie on the scanner while it takes readings of the density of the bones in your lower back and hip area. The radiographer stays in the room with you throughout the scan, which can take up to 30 minutes.
After the exam
You may get dressed and carry on with your normal activities. The radiology report of your bone mineral density scan will be emailed to your doctor on the day of your scan.