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Bone Densitometry
Also called dual-energy X-ray absorptiometry (DXA), bone densitometry is an enhanced form of X-ray technology used to measure bone mineral density (BMD). The DXA machine uses a thin, invisible beam of low-dose X-rays with two distinct energy peaks.
One peak is absorbed mainly by soft tissue
and the other by bone. The soft tissue amount
is subtracted from the total and what remains
is a patient's BMD.
A bone densitometry 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. This test can also track the effects
of treatment for osteoporosis and other
conditions that cause bone loss.
How is bone densitometry
(DXA) performed?
Bone densitometry is a simple, non-invasive
procedure performed on an outpatient basis.
The study is usually completed in 10 to 30
minutes, depending on the body parts
examined. Typically, the lower back and
hips are measured.
The patient lies on a padded examination
table and remain still for a short time while
the arm of the machine passes over their body
taking measurements. It is important that you
stay as still as possible during the procedure
to ensure a clear and useful image.
The procedure is painless and radiation exposure
is minimal.
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