Our understanding of the behavior of rapidly evolving or moving bodies has been advanced considerably by the use of high-speed cine-photography. This technique is concerned essentially with the exter-nal aspect of the bodief or with associated luminous phenomena. The internal structure or behavior of bodies that are opaque to visible light can be investigated by means of X-rays.These two techniques can be combined by using fast-response X-ray image-intensifier tubes. These two techniques which incorporate phosphors having a very short response time (about 0.25 µs), permit forming X-ray images obtained with pulsed energies of 50 keV to several MeV at frequencies of up to 106 images per second.
"X-Ray Image Intensifiers For High-Speed Cineradiography", Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); doi: 10.1117/12.957606; https://doi.org/10.1117/12.957606