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 uniform.
Barium exhibits high radio-opacity, and the condition might manifest after a few months of exposure. Extremely dense, isolated small opacities measuring 2–4 mm in diameter, occasionally arranged in a star-like pattern, are visible on the radiograph. Their distribution is consistent.