Xeroradiography and ionography: new technologies to replace the x-ray film.

Novel methods of radiogram imaging are described and compared with conventional means. They include: xeoradiography, low- and high-pressure ionography and liquid phase ionography. The possibility of real time operation is considered also. Of these systems, xeroradiography is already in use for a limited range of applications. High pressure gas ionography shows great promise and practical systems may be expected to appear in the near future.