What technology can quantitatively assess bone density using CT imaging?

Quantitative CT (QCT) is specifically designed to quantitatively assess bone density through computed tomography imaging. This technology uses advanced imaging techniques to create detailed 3D images of bone structures, allowing for the precise measurement of bone mineral density (BMD). QCT is advantageous because it provides both BMD information and spatial visualization of the bone, which can help in the diagnosis and monitoring of conditions like osteoporosis.

The other technologies listed do not serve the same purpose in assessing bone density. Quantitative Ultrasound involves measuring the speed of sound in bone but does not use CT imaging nor provides the same depth of detail as QCT. Positron Emission Tomography is primarily used for metabolic imaging and does not quantitatively assess bone density. Computed Tomography Angiography focuses on visualizing blood vessels and is not intended for measuring bone density. Hence, the capability and specificity of Quantitative CT make it the correct choice for assessing bone density using CT imaging.