DEXA Scan and Osteoporosis
If you have a family history of osteoporosis or are postmenopausal and suspect osteoporosis will affect your quality of life, then it may be time to take a closer look at what this “silent disease” i, how you can prevent it from taking control of your life, and the medical technology available to help you know your body.
Very simply, osteoporosis means that your bone mass and mineral density have decreased, thus diminishing the strength of your bones and increasing the risk of fractures. Although many believe only women are at risk for osteoporosis, that is not true: this disease affects men as well, and all genders as we get older. The first step to determining whether you have osteoporosis is a physical exam:
- Loss of height and weight may be signs of osteoporosis, as well as changes in posture
- If you’ve had a fracture that has not healed this is also a big sign of osteoporosis
- Balance and the way you walk can be affected by osteoporosis too
If the physical exam, along with your medical history and age, determines you may have osteoporosis then your doctor will order an exam to measure your bone density. This is where DEXA tests come in, which measure the mineral content of your bones, focusing on certain areas of your skeleton. DEXA stands for “dual-energy X-ray absorptiometry” and it is a medical imaging test; it uses very low levels of x-ray to determine how dense your bones may be (or not be).
What does the test involve?
Although it is a test you may not want to pass, medical professionals consider DEXA scans to be one of the most effective, quick and painless, as well as useful ways to diagnose osteoporosis.
- You will lie on the special DEXA x-ray table and the technologists will help you hold the desired position by using positioning devices.
- The arm of the DEXA machine will pass over your body, and two different x-ray beams with miniscule radiation distinguish bone from other tissue.
- The scanner gathers the data and translates the bone density information into pictures and graphs.
- A radiologist or other physician that has been trained in DEXA interpretation reviews and interprets the results of the scan. The expert sends a report to your primary doctor, who in turn discusses the results with you and determines the appropriate treatment.
Why is DEXA more effective than other methods?
As you may know, there are other body imaging methods that medical providers use: if you have a broken bone, you will most likely get an X-ray done, while if you experience constant headaches your doctor may order an MRI. DEXA very specifically measures bone density, and it also measures bone density in each specific area of the body. A common misconception is that our bone density is the same throughout our skeletal system, but DEXA is able to determine lean skeletal, fat, and bone masses in various spots in our body.