There is increase use of low power x-rays being used for security. It is in the testing phase. This X-ray may cut down on the current pat downs being down on female passengers. They can check humans and cargo at airports, border crossings and other security checkpoints. A lot of the use of this new technology will depend on its general acceptance.
http://www.boston.com/news/nation/articles/2004/11/27/covert_x_rays_tested_as_security_tool/
http://www.boston.com/news/nation/articles/2004/11/27/covert_x_rays_tested_as_security_tool/