He is also the inventor of fourteen issued US patents. Dr. Ruola Ning is the Director of the Cone Beam CT Imaging Lab. Currently his research interests include the development of cone beam CT technology, cone beam CT breast imaging, x-ray phase contrast imaging, cone beam CT angiography imaging, 3-D and 4-D medical imaging, and computer-aided detection and diagnosis. He also collaborates on a project of cone beam CT-based evaluation of bone cancer treatment using allografting.