[Intensifying screens: speed, definition, afterglow and abrasion resistance (author's transl)]. / Ecrans renforçateurs. Rapidité, définition, rémanence et résistance à l'abrasion.

Main characteristics of radiological intensifying screens were measured. Speed and definition under conditions described before. The different screens-film systems were ranged after their speed factor, at 40, 70 and 120 kV with mention of definition of these systems when measured. Afterglow and abrasion resistance were measured under experimental well definite conditions. Results show that are extant rare earth screens allowing a decrease of X-ray exposure without too great afterglow or mechanical frailty.

[Experimental study of intensifying screens used in diagnostic radiography (author's transl)]. / Etude expérimentale des écrans renforçateurs utilisés en radiographie.

A physical experimental study of intensifying screens for diagnostic radiography was set up. Experimental conditions were identical with those of medical practice. Spectra speeds of several films and spectral emission of intensifying screens were built up. Speeds of screen-film combinations, as well as definitions, were measured. Results are available to range the different screens-film systems after their speed factor, at 40, 70 and 120 kV, with mention of definition of these systems. It so objectively appears that rare-earth intensifying screens make possible a decrease of X-ray exposure for patient under a factor 2 to 2,5 and a less early wearing of apparatus, namely of X-ray tubes.