Quantitative computed tomography

Dr Henry Knipe and Dr Ayush Goel et al.

Quantitative computed tomography (QCT) 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 obese
  • spinal degenerative process does not significantly affect the results (c.f. DEXA)
  • can be used for both trabecular and cortical bone

See also

Share article

Article information

rID: 31443
Section: Physics
Tags: refs, cases
Synonyms or Alternate Spellings:

Support Radiopaedia and see fewer ads

Updating… Please wait.
Loadinganimation

Alert accept

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

Alert accept Thank you for updating your details.