[On the topic of work fitness examinations].
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Biomedical subjects
Publications and source records attributed to W F Diller.
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The relative radiographic densities of the basic ingredients and commercially available plastic materials were studied with the help of a water phantom. Surprisingly, the relative radiographic density showed a wide spectrum from 0.25 to 7.0, as is shown in an extensive table. Particles with a relative radiographic density of greater than 4.0 can be identified over the lumbar spine. Particles with a density of less than 0.5 as well as greater than 1.5 can be seen in the soft tissues of the hand at 50 kv. All known plastics have higher radiographic transparency than the barium sulphate suspensions used for gastro-intestina examinations.
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Personal experience and analysis of the medical literature on isocyanate asthma shows, that the reported incidence of this disease varies between 0 and 25%. Reasons for differences in observed incidence are intensity of isocyanate exposure, criteria for diagnosis, mode of calculation, sensitizing capacity of different isocyanates, individual predisposition and confounding factors (adjuvants). There is no geographical or ethnical prevalence. Work places at risk are those with isocyanate concentrations above 20 ppb (ceiling).