Learning Objectives: 1) Describe the fundamental components of a flat panel x-ray system and its operation. 2) Highlight the similarities and differences between the various detector configurations (ie. direct/indirect detectors). 3) Describe the physical reasons for their improved imaging performance. 4) Discuss the potential of this new technology for "advanced" procedures such as dual energy and tomography. Disclosure: (J.Y. is employed by Eastman Kodak Company.)