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Diagnosis > Diagnostic Techniques and Procedures > Diagnostic Imaging > Radiography > Absorptiometry, Photon
Investigative Techniques > Chemistry Techniques, Analytical > Photometry > Densitometry > Absorptiometry, Photon

Preferred term

Absorptiometry, Photon  

Type

  • Topical Descriptor

Broader concept

Related concepts

Entry terms

  • Photon Absorptiometry

Scope note

  • A noninvasive method for assessing BODY COMPOSITION. It is based on the differential absorption of X-RAYS (or GAMMA RAYS) by different tissues such as bone, fat and other soft tissues. The source of (X-ray or gamma-ray) photon beam is generated either from radioisotopes such as GADOLINIUM 153, IODINE 125, or Americanium 241 which emit GAMMA RAYS in the appropriate range; or from an X-ray tube which produces X-RAYS in the desired range. It is primarily used for quantitating BONE MINERAL CONTENT, especially for the diagnosis of OSTEOPOROSIS, and also in measuring BONE MINERALIZATION.

History note

  • 90; was see RADIONUCLIDE IMAGING 1985-1989; for DUAL-ENERGY RADIOGRAPHIC ABSORPTIOMETRY use DENSITOMETRY, X-RAY

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URI

http://www.yso.fi/onto/mesh/D015502

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