Standard ILO chest radiograph of large "A" nodular opacities

Reproduced with permission from: Guidelines for the use of the ILO International Classification of Radiographs of Pneumoconioses: ILO Standard Digital Images (ILO 2011-D) in DICOM Format. Copyright © 2011 International Labour Organization. Available at: http://www.ilo.org/safework/info/publications/WCMS_168337/lang--en/index.htm.