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What is DEXA?
Every day, physicians use radiography, or x-rays, to view and evaluate
bone fractures and other injuries of the musculoskeletal system.
However, a plain x-ray test is not the best way to assess bone density.
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To detect
osteoporosis accurately, doctors use an enhanced form of x-ray technology
called Dual-Energy X-ray Absorptiometry (DXA or DEXA). DEXA
bone densitometry is today's established standard for measuring bone
mineral density (BMD). DEXA is a quick, painless procedure for measuring
bone loss.
Measurement of the lower spine and hips are most often done. More
portable devices that measure the wrist, fingers or heel are sometimes
used for screening, including some that use ultrasound waves rather
than x-rays. |
Uses
of the Procedure
DEXA bone densitometry is used most often to diagnose osteoporosis.
Osteoporosis involves a gradual loss of calcium, causing the bones
to become thinner, more fragile, and more likely to break.
The DEXA test can also assess your risk for developing fractures.
If your bone density is found to be low, you and your physician can
work together on a treatment plan to help prevent fractures before
they occur. DEXA is also effective in tracking the effects of treatment
for osteoporosis or for other conditions that cause bone loss.
This Information was obtained from the Radiology Info Website www.radiologyinfo.com. |
Interpreting
the Results
T score — This number shows the amount of bone you have compared
to a young adult of the same gender with peak bone mass. A score above
-1 is considered normal. A score between -1 and -2.5 is classified
as osteopenia, the first stage of bone loss. A score below -2.5 is
defined as osteoporosis. It is used to estimate your risk of developing
a fracture.
Z score — This number reflects the amount of bone you have
compared to other people in your age group and of the same size and
gender. If it is unusually high or low, it may indicate a need for
further medical tests.
This Information was obtained from the Radiology Info Website www.radiologyinfo.com.
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