Quantitative computed tomography (bone)

Dr Henry Knipe and Dr Ayush Goel et al.

Quantitative computed tomography (QCT) in bone imaging is a bone mineral density (BMD) measurement technique in which the CT scanner is calibrated using solid phantoms (made of calcium hydroxyapatite, representing various bone mineral densities) placed under the patient in a pad. With this calibration, the Hounsfield units are converted to bone mineral density values.

The technique can be used for both peripheral and central BMD measurements, with lumbar spine and hip being preferred locations.

Disadvantages
Advantages
  • can be used in cases of scoliosis
  • can be helpful in obesity
  • spinal degenerative process does not significantly affect the results (c.f. DEXA)
  • can be used for both trabecular and cortical bone

See also

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Article information

rID: 31443
Section: Physics
Synonyms or Alternate Spellings:
  • QCT: bone

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