X-ray CT imaging will provide a potentially revolutionary capability to characterize and measure complex three-dimensional ice shapes. There are a number of technical questions and potential hurdles that need to be overcome. However, if successful, this technique will provide a means to measure the exterior and interior details of extremely complex over-lapping feathers and scallops. This would provide unique measurement capabilities that, to the best of the authors knowledge, have never been available in any other icing facility. It should also be noted that the authors believe that there is no fundamental limitation to operating an X-ray CT scanner in cold temperatures, down to -25C. If the X-ray CT imaging techniques prove to be successful and if a reasonable path can be identified in Phase II to create X-ray testing devices that can be adapted for use in icing tunnels then X-ray CT imaging could impact a wide range of government and commercial testing facilities. This technique would provide an alternate means to characterize complex 3D wing icing, engine icing and icing on more complicated three-dimensional geometries that are difficult to characterize by other methods. If materials can be identified that are suitable for tunnel testing and are transparent to X-rays then the X-ray CTs could also provide a unique means to measure icing within confined geometries (such as the blade passage of a compressure).