Although the American Association of Physicists in Medicine has developed a means to estimate the size of a patient for the purpose of calculating radiation doses, this is not a volumetric measurement, and can lead to an underestimation of the dose in smaller patients and overestimation in larger patients. So a system based around the Kinect has been developed that could help predict the precise dose of ionizing radiation that patients require during a CT scan by providing a more accurate estimate of whole-body volume. The researchers evaluated the effect of the position of a number of individuals by estimating their whole-body volume when their arms were by their sides, extended above their heads, or crossed over their chests. The density of an individual was then calculated by dividing each individual's weight by their volume.