DEXA SCAN

Body composition analysis, also known as a DEXA or dexa scan, provides information about your bone density, body fat, and muscle mass, and is helpful when evaluating levels of physical fitness. The term “dexa” stands for dual-energy X-ray absorptiometry, a technology that uses two low-energy X-ray beams for assessing body composition and bone density.

It is also used in the diagnosis and follow-up of osteoporosis. Women who are over 45 years of age (postmenopausal) and men over 50 years of age develop osteoporosis and hence are susceptible to fractures with minor trauma. Vitamin D, Calcium, Phosphorus deficiency and lack of exposure to sunlight can trigger osteoporosis.

What is a DEXA scan used to diagnose?

  • Diagnose osteoporosis.
  • Diagnose osteopenia.
  • Check your bone fracture risk.

Your provider might use a bone density test to see how your bones have changed over time, including:

  • Measuring the natural amount of bone loss that happens as you age and tracking your bone loss over time.
  • Evaluating your bone density before you start a treatment or medication that can weaken your bones as a side effect.
  • Checking if your bones are responding to treatment for osteoporosis or osteopenia.

Before for the scan

  • Unless we let you know otherwise, you don’t need to make any special preparations before the scan. You can eat and drink as normal and take any prescribed medicine.
  • Please wear clothing without zips or metal buttons; if you wear a bra, we’ll ask you to take it off.
  • We might ask you to change into a hospital gown. We’ll give you a container to keep your clothes and personal belongings safe.
  • You’ll be looked after by the radiography team throughout the procedure – they will explain what’s happening and will be there if you experience any discomfort.
  • You’ll have the opportunity to ask any questions.
  • You will not need an injection

During and after the scan

  • Spine or hip measurements take around five minutes.
  • You’re welcome to bring a friend or a relative with you, but for safety reasons we won’t normally allow them into the examination room.
  • (After) There are no restrictions on normal activity – you can eat and drink normally, drive and return to work immediately after the scan.
  • A Radiologist will examine the images shortly after your visit and send a report to your Doctor or consultant, normally within a few days.

Frequently asked questions:

No, there is no pain associated with a bone density test.

Approximately, 20 minutes for the examination but the actual scan time is only 90 seconds.

Yes. Bone Densitometry uses an extremely small dose of radiation.