Metal--phosphor intensifying screens for high energy imaging applications

For energy in the range 1 to 25 MeV, phosphor screens alone provide an image of unsatisfactory diagnostic quality. The combination of a metal and phosphor intensifying screen provides improved image quality. The dependence of the light output of such a screen system upon choice of metal, metal thickness, choice of phosphor, and phosphor thickness is presented. Certain metal and phosphor combinations are shown to have sufficient light output for viewing with a low-light-level TV camera.