National Cancer Institute
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Constructs > Construct Information
Body Composition
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Construct Name: Body Composition
Definition of Construct: Dual-energy X-ray absorptiometry DXA is one of the most widely used methods to assess body composition. A densitometer scanner device is used to scan the entire body or specific body sites such as the hip, spine, and limbs. DXA uses X-ray energy to measure body fat, muscle, and bone mineral and as a result, a small amount of radiation is delivered to the body during the DXA scan procedure. The results from a whole body DXA scan can be used to estimate total mass gm, bone mineral content BMC gm, bone area cm2, bone mineral density, fat mass, lean mass excluding BMC gm, lean mass including BMC gm, and percent body fat %. DXA scanner manufacturers produce special software that is used to analyze the DXA scan data to produce body composition results. Source: Centers for Disease Control and Prevention, National Center for Health Statistics, National Health and Nutrition Examination Survey NHANES 2001-2002 DXA file documentation. URL: http://www.cdc.gov/nchs/data/nhanes/dxa/dxx_b.pdf Accessed January 22, 2009
Related Content Area(s):
  • Anthropometrics
Theoretical Foundation:
Similar Constructs:
Keywords: PhenX
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(Last Updated: 2/10/2014 1:07:34 PM by Dave Garner)

     

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