Quantitative computed tomography (bone)

Last revised by Daniel J Bell on 30 Mar 2021

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.

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

See also

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.