January 3, 2021

JAN 3, diagnostic imaging: DEXA (BMD)

Authors' Note  DEXA, or Dual Energy X-ray Absorptiometry, is a simple standardized imaging test to assess bone mass in the context of osteoporosis. It actually measures bone mass in a peculiar form, i.e, mass per unit area (rather than volume) of tissue; differential attenuation (blocking by tissue) for the 2 photons of different energies is assessed for each spatial element in a planar field. The technique is however, excellent for serial tests in the same patient, and is now used  so widely that its results are regarded as synonymous with Bone Mineral Density (BMD).

 You can review all our verses on this intriguing topic by proceeding to a post on 'Edifying Nonsense' entitled 'Selected Topics in Diagnostic Imaging'. Click HERE!

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