Alex Simotas, MD

Hospital for Special Surgery
Board Certified Physiatrist
Specializing In Spine & Sports Medicine

Home > Diagnosis > Quantitative Computed Tomography

Quantitative Computed Tomography

Quantitative computed tomography (QCT) is used to measure bone mineral density (BMD) for osteoporosis. It is similar to a normal CT scan, but uses a computer software package that determines bone density in the hip or spine. This technique provides for true three-dimensional imaging and reports BMD as true volume density measurements. This enables the physician to focus on a particular area. QCT uses a higher dose of radiation than the standard test for osteoporosis, the dual-energy X-ray absorptiometry test, and may also be more expensive. (See Computed Tomography, Dual-Energy X-ray Absorptiometry.)