Early osteoporosis may go unnoticed until the bones become so weak that a sudden strain, bump or fall causes a bone fracture. In the past, conventional X-rays could only detect the disease after 25 percent of a bone's mineral content was already gone. Now, several imaging techniques make earlier detection easy, quick and convenient.
The most effective imaging technique is the dual energy X-ray absorptiometry (DEXA) densitometer scanning technology that's now available at Northern Virginia Foot & Ankle Associates, LLC. A DEXA scan can spot a loss in bone density as low as 1 percent.
DEXA scans use low-dose X-rays to determine the bone density. The scanning technique is fast and painless and requires no injections or invasive procedures. During a scan test, a person lies fully clothed on a padded treatment table while a mechanical wand is passed over the body. The radiation dose during the test is less than the radiation exposure during a coast-to-coast airline flight.
Your physician may recommend a DEXA scan to help:
1. Confirm a diagnosis of or tendency toward osteoporosis
2. Detect low bone density before a fracture occurs
3. Determine rate of bone loss if the test is repeated over time
4. Monitor the effects of treatment over time
The DEXA test is different from a bone scan. The latter test may help a physician identify certain bone abnormalities such as infection, inflammation and cancer, and requires an injection of radioactive material.
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