quantitative computed tomography


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quantitative computed tomography

A type of CT scan used to measure density of bone in the vertebrae or in the extremities (peripheral QCT), usually the wrist.

Cons
QCT is rarely used because it is expensive, results in higher radiation exposure, and is less accurate than DEXA, P-DEXA or DPA.

quantitative computed tomography

Abbreviation: QCT
A method for determining the bone mineral density of a three-dimensional bony specimen, e.g., in the vertebral bodies or the forearms. It is used in the diagnosis of osteopenia and osteoporosis.
See also: tomography
References in periodicals archive ?
Nazemi, "On prediction of the strength levels and failure patterns of human vertebrae using quantitative computed tomography (QCT)based finite element method," Journal of Biomechanics, vol.
Peripheral quantitative computed tomography is useful to monitor response to alendronate therapy in postmenopausal women.
Quantitative computed tomography (QCT) of the forearm using general purpose spiral whole-body CT scanners: accuracy, precision and comparison with dual-energy X-ray absorptiometry (DXA).
Quantitative computed tomography characteristics of study population.
Fracture threshold in the femur and tibia of people with spinal cord injury as determined by peripheral quantitative computed tomography. Arch Phys Med Rehabil.
Muscle and bone adaptations after treadmill training in incomplete Spinal Cord Injury: a case study using peripheral Quantitative Computed Tomography. J Musculoskelet Neuronal Interact.
However, when perimenopausal women are separated from premenopausal women, there are evident differences between these groups: in our study, peripheral quantitative computed tomography demonstrated a decrease in trabecular bone density in perimenopausal women.
Overestimation of osteopenia using standard analysis software for peripheral quantitative computed tomography. Clin Invest 1993;71:600-3.
In the present study, we used quantitative computed tomography (QCT) to investigate the prevalence of low BMD in patients with COPD and correlated our findings with DXA measurements, which are considered the gold standard.
Adams, "Quantitative computed tomography," European Journal of Radiology, vol.
Abbreviations: ANOVA = analysis of variance, ASIA = American Spinal Injury Association, BMC = bone mineral content, BMI = body mass index, DEXA = dual-energy X-ray absorptiometry, DOP = duration of paralysis, FM = fat mass, LM = lean mass, NLOI = neurological level of injury, pQCT = peripheral quantitative computed tomography, SCI = spinal cord injury, SD = standard deviation, SNS = sympathetic nervous system, SSI = stress-strain index, [SSI.sub.2] = SSI at 14% of tibia length, [SSI.sub.3] = SSI at 38% of tibia length, T = thoracic, [SSI.sub.3-2] = difference between [SSI.sub.3] and [SSI.sub.2].
Whereas absorptiometers measure the absorption of radiation by skeletal calcium, quantitative computed tomography (QCT) scanners measure the actual density of a volume of bone.

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