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Quantitative CT

- Discussion:
    - quantitative CT is unique in that it can determine both bone density and distribution in three dimensions at any skeletal site;
          - bone density can be estimated separately in trabecular and cortical bone compartments;
    - generally performed at the lumbar spine using routine CT scanners;
    - quantitive CT has the best sensitivity and specificity for distinguishing patients with spinal osteoporosis from subjects without it;
          - after QCT, most specific and sensitive tests are DXA and dpa, and finally SPA