absorptiometry


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absorptiometry

 [ab-sorp″she-om´ĕ-tre]
in radiology, the measurement of the degree to which the radiation emitted by a radioisotope is completely dissipated within a tissue.
dual energy absorptiometry (DEXA) an imaging technique that uses two low-dose x-ray beams with different levels of energy to produce a detailed image of body components; used primarily to measure bone mineral density.
dual photon absorptiometry measurement of bone mineral content in the axial skeleton, particularly the lumbar spine, by comparing transmission of the two separate photoelectric energy peaks emitted by gadolinium 153 through both soft and bone tissues.

absorptiometry

Measurement of absorption, for example, of radiation.

absorptiometry

(əb-zôrp′tē-ŏm′ĭ-trē, -sôrp′-)
n.
A method of chemical analysis in which a sample of a substance is exposed to electromagnetic radiation, and the amount of radiation absorbed is measured to determine the chemical composition or concentration of the substance.

Absorptiometry

A technique used to assess bone mass, which measures the degree to which radiation emitted by a radioisotope is dissipated in a tissue. 
Types Single photon absorptiometry, dual X-ray absorptiometry

ab·sorp·ti·om·e·try

(ăb-sōrp'shē-om'ĕ-trē)
A measure of the absorption of one thing by another, as in the use of x-rays as a means of measuring bone density.
References in periodicals archive ?
Role of dual-energy X-ray absorptiometry in the diagnosis and treatment of osteoporosis.
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.
Keywords: Cerebral Palsy, CP, Bone mineral density, BMD, Dual energy X-ray absorptiometry, DEXA, Lumber vertebra.
Detection of small changes in body composition by dual-energy x-ray absorptiometry.
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.
2008) Estimation of stature and length of limb segments in children and adolescents from whole-body dual-energy X-ray absorptiometry scans.
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.
Men at higher risk for osteoporosis--including men aged 70 or older, and men between ages 50 and 69 who have risk factors (such as smoking, high alcohol consumption and/or gastrointestinal diseases that affect calcium absorption)--should be tested using dual-energy x-ray absorptiometry (DXA).
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.
The studies will evaluate as co-primary endpoints the effect of Ostarine on lean body mass assessed by dual x-ray absorptiometry (DXA) and on physical function assessed by the Stair Climb Test (each endpoint ?