The chest radiograph appearance seen in this condition is graded according to standards set out by the International Labour Office. These gradings are:
0 : no evidence of pneumoconiosis
1 : there are definitely small round opacities present on CXR but they are few in number
2 : there are numerous small round opacities but the normal lung markings are still visible
3 : there are numerous small round opacities on CXR and the normal lung markings are totally obscured
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