Bone Density Scan to Evaluate Your Bone Condition
A bone density scan is a non-invasive and painless test that determines the condition of your bone health. Currently, Dual energy x-ray absorptiometry (DEXA) is considered to be the best test to measure bone density.
A Bone Density Scan Is Suggested For The Following People:
- The ones who have had a fracture in the past
- The ones with one or more additional osteoporosis risk factors
- Patients considering therapy for treatment of Osteoporosis
- Those who are undergoing hormone replacement therapy for prolonged periods
This bone density test is usually conducted to identify Osteoporosis, to determine risk for fractures and to observe response to an osteoporosis treatment. DEXA is used to measure bone density of the hip, spine, wrist, or heel.
The bone density score can be categorized into two norms: The T-score compares the bone mineral density of the patient to peak mineral density of a 30-year old to determine the risk of fracture. The Z-score compares your bone mineral density to what is expected in someone of your age and body size. In older people, the low bone mineral density is common. So, the z-score might not depict the actual conditions of your bones.
The difference between your bone density and that of a healthy, young adult is termed as standard deviation. According to the World Health Organization, T-score from -1 to 0 SD indicates normal bone density. However, scores from -1 to -2.5 SD below the norm indicates low bone mass, or Osteopania. A standard deviation of more than -2.5 below normal indicates osteoporosis.
This is a quick and painless bone density test similar to X-ray but the patient is exposed to much less radiation.