An X-ray image amplifier using an image orthicon camera tube

Special requirements of a television camera for use as an X-ray image amplifier are outlined. In television, illumination can be controlled, whereas in this X-ray application illumination is controlled by the thickness of the subject under examination. Details are given of the special camera tube which has been developed to operate under these conditions and also of the ancillary apparatus required to obtain maximum sensitivity and definition from such a tube. The reason for adopting a scanning system not compatible with any of the accepted standards is also discussed.