Dual Photon Absorptiometry



- Discussion:
    - this technology allows subtraction of soft tissue density from bone density of bone mass of the hip, pelvis, and spine;
    - dual-photon absorptiometry uses transmission scanning w/ isotope source that emits two photoelectric peaks;
          - it allows(bone density to be measured independently of soft-tissue thickness and composition;
    - has good reproducibility (2-3 %) & accuracy (4 percent);
    - has low radiation exposure (less than 10 mrem);
    - dual-photon absorptiometry (DPA) measurements of spine have equivalent to appendicular SPA measurements in predicting both spinal and appendicular fractures and have become favored in clinical practice



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Thursday, August 23, 2012 9:52 am