Particle Contents of Human Lungs
An automated analysis technique utilizing scanning electron microscopy, energy dispersive x-ray analysis, and image analysis was used to determine the exogenous particulate burdens for 48 urban lung specimens from the Cincinnati, Ohio area. Over 60,000 individual particle analyses were performed for the sample group. The mean exogenous particle concentration was 508 ± 417 × 106 particles per gram of dry lung, with a range of 107 − 1844 × 106 particles/g. The particle compositions found in all lungs were very similar. Major particle types included various aluminum silicates, silica, rutile, iron oxide, talc, and alumina. This data will serve as baseline data for lungs with no overt pneumoconioses against which the particle contents of diseased lungs can be compared.
KeywordsParticle Content Magnesium Silicate Aluminum Silicate Welding Fume Automate Analysis Technique
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