1. A CT scanner for imaging a region of interest of a subject, the CT scanner comprising: a source of one or more X-ray beams, wherein the source is adapted to provide at least one beam for acquiring a CT image of the subject; a support that supports the subject; and a controller that controls the X-ray source to illuminate the region of interest with X-rays to acquire stereo image data for the region of interest and controls the position of the support responsive to the stereo image data.