What is the role of quantitative CT (QCT) in the workup of osteoporosis?

Updated: Sep 26, 2019
  • Author: Monique Bethel, MD; Chief Editor: Herbert S Diamond, MD  more...
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Answer

Quantitative computed tomography (QCT) is another method employed to measure spinal BMD. At the spine, it measures BMD as a true volume density in g/cm3, which is not influenced by bone size. This technique can be used in both adults and children. QCT scanning of the spine is the most sensitive method for diagnosing osteoporosis, because it measures trabecular bone within the vertebral body. At the hip, QCT produces DXA-equivalent T-scores and BMD measures in g/cm2. [99, 100]


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