Baritosis is a benign type of pneumoconiosis, which is caused by long-term exposure to barium dust. Barium has a high radio-opacity and the disease may develop after few months of exposure. Extremely dense, discrete small opacities of 2–4 mm diameter, sometimes of a star-like configuration, are seen on the radiograph. Their distribution is unifo... Found on http://en.wikipedia.org/wiki/Baritosis