[en] Calculations have been performed of the kerma to radiographic film and to silicon from a number of x-ray spectra generated at 30 to 140 kV with tungsten and molybdenum targets. These results have been compared with the air-kerma values due to the same beams. It is concluded that both film and silicon can be used as practical dosemeters with an accuracy of ±5% to 15%, provided that correction factors are applied based on the generating potential or preferably the beam quality, expressed as half-value thickness. 8 refs., 2 tabs., 5 figs