If you are a patient with symptoms of osteoporosis, your doctor has likely mentioned the term "Dexa scan." The word "Dexa" stands for Dual Energy X-Ray Absorptiometry, and the scan is a test to measure a patient's bone density. Testing for osteoporosis usually includes a Dexa scan.
History
A physician will determine if you should have a Dexa scan based on several factors. If you have symptoms of osteoporosis, a Dexa scan will likely be ordered. Symptoms include the development of painful fractures. The fractures can occur in different areas of the body, including the spine and back. Patients at a high risk of developing osteoporosis will also likely get a Dexa scan. This includes a family history of the condition, low body weight, advanced age and use of certain medications.
Function
The Dexa scan measures the bone-mineral density in the patient's body. Multiple X-rays will be taken of your body to measure the amount of calcium and bone minerals in the makeup of your bones. The test will focus on areas of the body that are at risk for fractures, including the spine and hips. You will lie down on a soft surface while a mechanical device swings over parts of your body to provide bone-density images.
Features
You will be given both a T and Z score when you have a Dexa scan. The T score indicates whether your bone density falls within a normal range for a person in her 30s, when bone density peaks, while the Z score is a comparison against other individuals of your age, sex and weight.
Identification
If your T score is above -1, your Dexa scan is considered normal. If you score below this number, the scan indicates you have either osteoporosis or osteopenia, the precursor to the condition. The Z score is given in the same format and can help your physician indicate whether you are suffering from a secondary form of osteoporosis.
Warning
If you are pregnant, you should not have a Dexa scan performed. It is also not recommended for individuals who have had an X-ray with contrast within the last seven days. The previous X-ray may interfere with the results of the scan.
Tags: Dexa scan, bone density, Dexa scan, have Dexa, have Dexa scan, areas body, including spine
