Dexa Scan / Bone Density Test
Navigating
Bone Health
With DEXA
Scan
Dual Energy
X-ray Absorptiometry (DEXA) scan is a medical technique used primarily to
measure and assess bone density through spectral imaging. Also known as bone
density scan, this imaging technique is majorly used to assess bone health,
body composition, and determining the risk of fractures. This imaging technique
leverages low-dose X-rays to effectively measure the density of bones and other
body tissues. Commonly used to diagnose bone disorders such as osteoporosis,
monitor response to ongoing treatment, and generate a proper evaluation of the
body composition. The test is primarily used to measure bone density in
different parts of the body such as spine, hip, and wrist.
Overview of the Key Aspects of the DEXA Scan
Uses of DEXA Scan:
DEXA scan is
majorly used to determine and measure the bone mineral density of different
parts of the body including spine, wrist, and hips. Measurement of bone mineral
density enables healthcare providers to screen and assess the bone strength and
determine the chances of fractures. Low bone mineral density is often an
indication of osteoporosis; wherein bones become brittle and more susceptible
to fractures and hairline cracks. In addition, DEXA can also be indicative of
body composition and provides detailed information about lean muscle mass, fat
mass, and visceral fat measurement.
Procedure:
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Before the scan begins,
patients may be advised to wear loose fitting and comfortable clothing that do
not have metal fasteners, chains, or buttons as they can interfere with the
scan.
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The patient is then made to lie
down on the examination table and the DEXA machine which consists of a scanning
arm and a detector is arranged close the patient.
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The scanning arm then passes
over the area to be screened and emits low-dose X-rays that passes through the
patient’s body.
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The detector then measures the
amount of X-rays that have been absorbed by the bone and the tissues.
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It is important for the
patients to lay still during the procedure to avoid any blurry scans or
complications.
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The scan is relatively quick
and takes about 10-30 minutes depending on the areas to be examined and the
need for the procedure.
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The collected data from the
scanning arm and detector are then transferred to a computer to generate images
and measurements of the bone mineral density and body composition.
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In some cases, repeat scans may
be advised to the patients to monitor the progress of the treatment
administered.
Benefits:
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Relatively quick and painless
procedure
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Valuable diagnostic tool for
monitoring conditions such as osteoporosis and osteopenia
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Helps in timely identification
of individuals at risk for fractures and administer proper treatment
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Beneficial for athletes,
fitness professionals, and individuals who want to keep track of their muscle
mass and weight due or availability of comprehensive body composition analysis
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Critical in monitoring
treatment administered for osteoporosis or bone-related conditions
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Used in clinical research
studies to study bone health, body composition, and their impact on health
conditions
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Enables healthcare providers to
develop personalised health care plans
It is important for the patients to inform their healthcare providers if they have recently undergone any CT or PET-CT scans as dyes can interfere with the result outcome. Although considered safe, this scan uses low dose of ionizing radiation so it is important for the patients to inform their healthcare providers if they are pregnant or might be pregnant. In case the patients are under any medications or supplements, it is advisable to inform their doctors as some supplements can affect bone density and may interfere with the bone scan.
