dual-energy x-ray absorptiometry


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Related to dual-energy x-ray absorptiometry: DEXA, DEXA scan, Bone densitometry

dual-energy x-ray absorptiometry (DEXA),

Use of low-dose x-radiation of two different energies to measure bone mineral content at different anatomic sites.

dual-energy x-ray absorptiometry

n. Abbr. DEXA or DXA
Absorptiometry using two x-ray beams at different energy levels, especially in determining bone mineral density.

dual-energy x-ray absorptiometry (DEXA)

an imaging technique for quantifying bone density, used in the diagnosis and management of osteoporosis.

dual-energy X-ray absorptiometry

A technique using two different X-ray beams to estimate bone density in vertebrae and hip, which is the most accurate way to measure bone mineral density. Strong, dense bones allow less of an X-ray beam to pass through them; the amounts that each beam are blocked by bone and soft tissue are compared to each other.

Pros
DEXA can measure as little as 2% bone loss/year; it is fast and uses very low doses of radiation

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.

dual-energy X-ray absorptiometry

; DEXA imaging modality allowing bone mass evaluation, e.g. in osteoporosis

dual-energy x-ray absorptiometry,

n diagnostic test used to determine bone density and to diagnose and monitor osteoporosis.
References in periodicals archive ?
Fundamentals and pitfalls of bone densitometry using dual-energy X-ray absorptiometry (DXA).
Comparison of multi-frequency bioelectrical impedance analysis with dual-energy X-ray absorptiometry for assessment of percentage body fat in a large, healthy population, Am J Clin Nutr.
Dual-energy x-ray absorptiometry has received the 'gold standard' title from many resources (5,6,8-10,21).
Comparison of hand-to-hand bioimpedance and anthropometry equations versus dual-energy X-ray absorptiometry for the assessment of body fat percentage in 17-18-year-old conscripts.
This study has shown that there is no statistically significant difference between T-score values obtained by quantitative ultrasound and those obtained by dual-energy x-ray absorptiometry measurement.
2009) Prediction of appendicular skeletal and fat mass in children: excellent concordance of dual-energy X-ray absorptiometry and magnetic resonance imaging.
Bone mineral density (BMD) of lumbar spine, forearm, hip and whole body was assessed at baseline and at the end of the study using dual-energy X-ray absorptiometry.
Central dual-energy X-ray absorptiometry (DXA) screening for bone density is the standard test by which osteoporosis is detected, but these are expensive and subject patients to radiation.
Goldstein recommended annual use of the FRAX tool (WHO fracture risk assessment tool) in patients with osteopenia to determine when pharmacologic intervention is warranted, suggesting that it should be the "standard of care" He also advised against follow-up dual-energy x-ray absorptiometry (DXA) imaging at any arbitrary interval, but urged that the interval be based on FRAX findings.
Bone mineral density and body composition were measured with a GE Lunar Prodigy dual-energy X-ray absorptiometry.
Theirs is the first study to use high-resolution peripheral quantitative CT scanning as well as the usual dual-energy x-ray absorptiometry to examine bone.
Body composition was measured by dual-energy X-ray absorptiometry bi-weekly, resting energy expenditure was measured weekly by ventilated hood, and total energy expenditure by doubly labelled water prior to the overeating and weight stabilisation periods and at weeks 7 - 8.