Dexa Scan
Bone Density Test
Dexa Scan
Definition:
Today a bone density test, also called densitometry or DEXA scan,
can determine if you have osteoporosis or are at risk of osteoporosis before you
break any bones.
A bone density test uses special X-rays to measure how many grams of calcium and other bone minerals are packed into a segment of bone.
A bone density test is fairly accurate predictor of your risk. The results from a bone density test can let you know how you compare with other people of your age, sex, and other similar characteristics.
Why it’s done:
The older you get, the higher your risk of osteoporosis because your bones become weaker as you age. Your race also makes a difference: you're at greatest risk of osteoporosis if you're white or of Southeast Asian descent, and African American and Hispanic men and women have a lower, but still significant, risk. Other risk factors for osteoporosis include low body weight, a personal history of fractures, a family history of osteoporosis and using certain medications that can cause bone loss.
The U.S. Preventive Services Task Force
recommends routine bone density screening if you are a woman age 65 or older or
you are 60 and at increased risk of osteoporosis.
How to prepare:
No special preparation is required on your part before a bone scan, though you
may be asked to remove clothing, jewelry or other metal objects. You can eat or
drink anything you like before the test.