[en] The results of a survey of 2,257 dental offices recording dental radiology practices are presented and compared to earlier surveys. In many practices patients were exposed to radiographs at predetermined intervals; the variables of manual processing are not well controlled, and darkrooms had excessive light

[en] Inadvertent exposure of film badges to environmental factors may produce fogging of the film and yield higher radiation exposure readings. Common environmental factors in everyday living were studied to assess their effect on film badge readings. Only heat appeared to have any significant effect, because moisture, chemicals, pressure, cold temperature, and non-work-related electromagnetic radiation did not substantially alter film badge readings. Therefore not all unexplained high readings on personnel film badge reports may be due to heat or other common environmental factors evaluated in this study

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