dual x-ray absorptiometry


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du·al x-ray ab·sorp·ti·om·e·try

(DXA) (dū'ăl eks'rā ăb-sorp'shē-om'ĕ-trē)
Use of low-dose x-radiation of two different energies to measure bone mineral content and fat:lean ratios at different anatomic sites.
References in periodicals archive ?
"Dual x-ray absorptiometry would allow packers to know just what they are paying for: the true value of the meat and not a large amount of fat that gets cut off before shipping," says Mitchell.
Sixty-two women and 48 men were measured for whole body R and Xc at 50 kHz (RJL Systems Quantum X) and for body composition by pencil beam dual x-ray absorptiometry (Hologic, Inc.
Campaigners argued the Dual X-ray Absorptiometry (DXA) scanner would soon ``pay for itself'' because of the savings to the NHS from the costs of treating fractures or hip replacements.
One commonly used is the dual X-ray absorptiometry method (DEXA), which takes measurements at the spine, hip, or forearm and converts them to a T-score of standard deviations (SD) comparing the patient's reading with that of a young adult.
Single and dual photon absorptiometry (SPA/DPA) are now obsolete, but were important forerunners for the current methods of single and dual x-ray absorptiometry (SXA/DXA).[3]
While computed tomography, magnetic resonance imaging, densitometry, and dual x-ray absorptiometry (DEXA) are commonly used reference methods to provide accurate body fat percentage (%Fat) measurements, they are expensive, time-consuming, and often inaccessible to the general population.
Last year, the Endocrine Society issued guidelines calling for osteoporosis screening with dual X-ray absorptiometry (DXA) imaging scans for all men over age 70 and men ages 50-69 at higher risk of osteoporosis.
Study participants also underwent measurement of bone density by dual X-ray absorptiometry (DEXA) and by a portable heel ultrasound device.
In one randomized, double-blind study, for example, 51 postmenopausal women with osteopenia were treated with alendronate or placebo and followed over a 2-year period by 3-T MRI of the radius, tibia, and femur; hr-pQCT of the radius and tibia; and dual x-ray absorptiometry measures of bone mineral density.
The study confirmed previous reports that bone mineral density (BMD) as measured by dual x-ray absorptiometry (DXA) is higher in women with type 2 diabetes than in women without diabetes.
Bone mineral density screening with dual X-ray absorptiometry (DXA) every two years is advised for women who entered-menopause before age 45, postmenopausal women under age 65, women who have had a fracture as an adult, those with a family history of osteoporosis, and women who take medications such as thyroid hormones or corticosteroids.
At the beginning and end of the school year, they underwent fasting evaluation of insulin and glucose and measurement of body composition by dual x-ray absorptiometry.

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