ILO description of radiographic features of pneumoconioses C

The definition of each symbol should be understood as being preceded by an introductory qualifying word or phrase such as "changes indicative of," "opacities suggestive of," or "suspect."
aa: atherosclerotic aorta; at: significant apical pleural thickening; ax: coalescence of small opacities; bu: bulla(e); ca: cancer, thoracic malignancies excluding mesothelioma; cg: calcified non-pneumoconiotic nodules (eg, granuloma) or nodes; cn: calcification in small pneumoconiotic opacities; co: abnormality of cardiac size or shape; cp: cor pulmonale; cv: cavity; di: marked distortion of an intrathoracic structure; ef: pleural effusion; em: emphysema; es: eggshell calcification of hilar or mediastinal lymph nodes; fr: fractured rib(s) (acute or healed); hi: enlargement of non-calcified hilar or mediastinal lymph nodes; ho: honeycomb lung; id: ill-defined diaphragm border; ih: ill-defined heart border; kl: septal (Kerley) lines; me: mesothelioma; pa: plate atelectasis; pb: parenchymal bands; pi: pleural thickening of an interlobar fissure; px: pneumothorax; ra: rounded atelectasis; rp: rheumatoid pneumoconiosis; tb: tuberculosis; od: other disease or significant abnormality.