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3647011 
Journal Article 
ILO 'A' and 'B' Reader Classification 
Hodous, TK 
1990 
Yes 
Journal of Occupational Medicine
ISSN: 0096-1736
EISSN: 2332-3795 
NIOSH/00232210 
32 
3 
267 
The NIOSH A-reader and B-reader certification program, and the International Labour Office (ILO) classification system for chest X-ray films were discussed in this letter to the editor. The Department of Health and Human Services mandated that both the ILO opacity classification system and NIOSH A-readers and B-readers be used in its surveillance program for coal miners. OSHA also mandated that chest X-ray films of asbestos (1332214) exposed workers be interpreted by ILO readers. OSHA does not require that these films be read by certified B-readers. 
DCN-232635; NIOSH Author; Chest X rays; X ray diagnosis; Asbestos workers; Regulations; Occupational medicine; Coal miners; 1332-21-4