Portable X-ray machines have been around for nearly 100 years, but they are only portable in the sense that they can be budged at all. Most are heavy, large, and require as much power as an electric-fired home water heater to use.
"Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover." -- Mark Twain